quality Light Deprivation Greenhouse & Agricultural Glass Greenhouse factory

The types of multi-span greenhouses on the market are classified differently according to different covering materials, and are also different from single-span greenhouses. The details are as follows:       1. Sawtooth multi-span greenhouse Greenhouses with vertical vents on the roof are collectively called Sawtooth greenhouses. Sawtooth greenhouses can be divided into half-arch and full-arch. The roofing materials are mostly made of plastic film or PC board. This kind of greenhouse has larger vents than the round-arch greenhouse, so the ventilation effect is better. However, the insulation effect is average and when building a Sawtooth greenhouse, special attention should be paid to the local wind direction.       2. Round arched multi-span greenhouse The dome-shaped multi-span greenhouse adopts a semicircular or reasonable curved skeleton form as the roof structure. It is the most commonly used building shape for plastic film greenhouses. It can also be used for PC board greenhouses. Its structure is simple, the stress is clear, the roof slope is gentle, and the opening The window position is flexible and the cost is low. In the south, single-layer films are mostly used to increase light transmittance. In the north, in order to reduce energy consumption in winter, single-layer plastic films are changed to double-layer plastic films.   3. Venlon greenhouse The Venlo type greenhouse is a small-roofed double-slope greenhouse. It splits the roof of the ridge-type greenhouse into 2 to 4 small roofs of 3.2 (or 4m) m each span, which reduces the roof height and thus reduces the wind Effect of load. The roof frame is an aluminum alloy profile, and the covering material is mostly made of glass or PC boards. The Venlo-type greenhouse components have small cross-sections, resulting in higher light transmittance of this type of greenhouse. In addition, it has a long service life, strong environmental control capabilities, and large operating space. Large, it is currently the most widely used large-space multi-span glass greenhouse in the world.     Multi-span greenhouses have many advantages over single-span greenhouses, so the construction area of multi-span greenhouses is getting larger and larger. Here are the main advantages and disadvantages of a multi-span greenhouse. Advantages:   Better control of the environment. As the air volume of a multi-span greenhouse increases, the fluctuations in indoor temperature will decrease. The ratio of the enclosure surface area to the ground area of a small greenhouse is large, and the enclosure surface is the main way for the greenhouse to gain or lose heat, so the air temperature changes quickly. Heating costs are lower. Because the ratio of the enclosure surface area to the ground area is smaller, the heat loss is smaller. Moreover, the entire multi-span greenhouse space only needs to be equipped with one heating system. The land utilization rate is higher. The waste of land caused by the spacing between single-span greenhouses is overcome in multi-span greenhouses. The internal space is more fully utilized. In single-span greenhouses such as Quonset, the side walls are curved sloping walls, and the ground is not fully utilized. This problem does not exist with multi-span greenhouses. Easy to expand. An attached greenhouse extension is easily attached to an existing greenhouse by adding a few rows of gutter posts. Existing gables or side walls can be removed completely or retained for use as greenhouse partitions. Flexible partitioning. Partition walls can be installed in multi-span greenhouses to carry out zoning management in the greenhouse.       Disadvantages of multi-span greenhouses: 1. Single plant area. Without partition walls, the greenhouse would become a single growing area, limiting the possibility of growing multiple plants at the same time. 2. The initial investment is high. 3. Plant diseases and insect pests spread easily. Lack of physical barriers to prevent pests and diseases. 4. Uneven areas of hot and cold may occur. Multi-span greenhouses have a large area and are prone to ventilation dead spots, especially when circulating fans are not used. This phenomenon is more obvious. 5. The gutters may be covered with snow. Although snow in greenhouse gutters will melt when heated, it is still necessary to monitor the snow accumulation in the gutters to avoid structural damage. Multi-span greenhouses have improved the degree of automation. Arm-type sprinkler irrigation systems, hanging basket cultivation systems, hot water heating pipes and sunshade systems can be installed in the multi-span greenhouse space. Saves more manual labor. In multi-span greenhouses, workers do not have to go back and forth to each greenhouse to perform production operations like they do in single-span greenhouses. In addition, multi-span greenhouses make it easier to use equipment such as forklifts, carts, and monorail transportation to reduce the amount of manual labor. Multi-span greenhouses can prevent crops from being exposed to the cold outdoor air in winter during operation. Some multi-span greenhouses can also be built very tall to meet the space requirements for loading large trailers of animals.

In the process of greenhouse construction, the choice of greenhouse plastic film is very important. It can not only affect the growth and development of crops, but also play a protective role when disaster strikes. Therefore, choosing a suitable film has become a big problem for vegetable farmers. Today we will learn more about it.                               In many cases, vegetable farmers choose greenhouse films based on the thickness of the film, because thicker greenhouse films are easier to use and have higher thermal insulation effects. If the greenhouse is planted in a rainy and windy area, we recommend that you choose this thicker film, because this film has a strong protective effect, is not easily damaged, and is easier to maintain.   If the greenhouse planting location is in an area with drought and little rainfall, then a relatively thin film should be selected, which is not only beneficial to the photosynthesis of crops, but also cheap and reduces unnecessary expenses.                                 In the past, most greenhouse films were colorless and transparent. With the development of science and technology, light blue films have become the mainstream. In addition, films in black, purple, pink, yellow and other colors have also been born one after another, and colored films Films can change the nature of light in a greenhouse.   Compared with colorless films, colored films can increase vegetable yields and reduce pests and diseases. For example, yellow films can obviously promote the growth of cucumbers, but light blue films can increase the yield of coriander but reduce the yield of cucumbers. Therefore, we need to conduct a detailed analysis of the greenhouse film we need based on the planting area and the types of planting materials.

  Temperature and climate control:   Greenhouses provide temperature and climate control. By using heating and ventilation systems, agricultural practitioners can adjust the temperature and humidity in the greenhouse under different seasons and climate conditions to create the most suitable growing environment for crops. In contrast, traditional planting methods are subject to the natural climate and cannot precisely control temperature and climate.     Water resource utilization efficiency:   Greenhouses usually use water-saving irrigation systems, such as drip irrigation or micro-sprinkler irrigation. These systems provide precise control of water supply, delivering water directly to the plant's root zone, minimizing evaporation and wastage of water. In contrast, irrigation in traditional planting methods usually uses flood irrigation or sprinkler irrigation, which results in greater water loss.       Crop protection:   Greenhouses provide physical barriers to insects, pathogens and pests. In addition, by controlling the environmental conditions within the greenhouse, such as temperature, humidity and ventilation, the occurrence of pests and diseases can be reduced. In contrast, in traditional planting methods, crops are susceptible to pests and diseases found in the natural environment.     Extend the production season:   Greenhouses can provide stable environmental conditions, allowing the crop production season to be extended. Whether it is cold winter or hot summer, greenhouses can provide a suitable growing environment, allowing agricultural practitioners to plant and harvest throughout the year. In contrast, traditional planting methods are subject to seasonal restrictions and can only be planted during suitable seasons.       Yield and quality control:   Greenhouses provide better control of the growing environment and can optimize crop growing conditions, thereby increasing yield and quality. Agricultural practitioners can precisely control factors such as irrigation, fertilization, light and temperature, making crops grow more uniformly, quickly and healthily. In addition, crops in greenhouses are not affected by natural disasters, such as storms, hail, etc., further ensuring the stability of output and quality.     Save land and resources:   Greenhouses use technologies such as vertical planting and cascading planting to maximize the use of limited land resources. In addition, in greenhouses, agricultural practitioners can more precisely control the amount of fertilizers and pesticides used, reducing pollution to soil and water resources. In contrast, traditional planting methods usually require larger areas of land, and the application of fertilizers and pesticides is not precise enough, which can easily lead to environmental pollution and waste of resources. Compared with traditional planting methods, greenhouses have obvious advantages in temperature and climate control, water use efficiency, crop protection, production season extension, yield and quality control, and land and resource conservation. These advantages make greenhouses an efficient and sustainable way of agricultural production.

Nowadays, growing crops is almost inseparable from greenhouses. Greenhouse technology can not only improve the ability to withstand natural environmental disasters and resist droughts and floods, but can also advance or delay cultivation, extend the growth period of economic crops, and achieve early maturity, late maturity, increased and stable yields. purpose and is very popular among farmers. Due to different climates and applied research around the world, the specifications of greenhouses also vary. We will introduce and analyze several of the most common greenhouse data types in current society, talk about their advantages and disadvantages, and help friends choose a suitable greenhouse more reasonably.       1.Plastic Greenhouse Large-scale multi-span plastic greenhouse is a greenhouse type that has appeared in the past decade and has achieved rapid economic development among enterprises. Compared with glass greenhouses, it has the advantages of light weight, less skeleton material, small shading rate of structural parts, low cost, and long service life. Analysis of its environmental management and regulation learning ability basically allows us to achieve the same results as a glass greenhouse at the same time. Living standards, the use of film greenhouses worldwide is far higher than that of glass greenhouses, and has become the mainstream of the development of China's modern agricultural greenhouse industry.     2. Glass greenhouse A glass greenhouse is a greenhouse with glass as a transparent covering material. In foundation design, in addition to meeting strength requirements, it should also have sufficient stability and resistance to uneven settlement. The foundation connected to the inter-column supports should also have sufficient horizontal force transmission and spatial stability. The bottom of the greenhouse should be located below the frozen soil layer. The impact of heating on the freezing depth of the foundation can be considered based on climate and soil conditions. The foundation foundation should be more than 0.5 meters lower than the outdoor ground, and the distance between the top surface of the foundation and the outdoor ground should be greater than 0.1 meters to prevent foundation exposure and adverse effects on cultivation. Except for special requirements, the distance between the top surface of the greenhouse foundation and the indoor floor should be greater than 0.4 meters.     3. Solar Greenhouse The front slope is covered with thermal insulation at night, and the east, west and north walls are single-slope plastic greenhouses, collectively called solar greenhouses. Its prototype is a single-slope glass greenhouse. The front slope transparent covering material uses plastic film instead of glass and evolved into an early solar greenhouse. Solar greenhouses have the properties of good thermal insulation performance, low investment, and energy saving. They are very suitable for use in China's economically underdeveloped rural areas.   4. Film Greenhouse The greenhouse covering material is Film, the roof structure of the single-span arch greenhouse. The construction of film greenhouse is easy to use and requires low investment. It is a simple protected land cultivation facility. With the development of the film industry, it is widely used all over the world. Film greenhouse systems generally rely on the greenhouse environmental effect to accumulate heat without heating the room. The minimum operating temperature is generally 1~2°C higher than the outdoor temperature, and the average operating temperature is 3~10°C higher than the outdoor temperature.

The multi-span greenhouse is an economical greenhouse that is very popular among users for its beautiful arc shape and low cost. The curved roof is beautiful and elegant, and the line of sight is smooth. The structure uses a small amount of steel and has good thermal insulation performance. The manufacturing cost is relatively low and it is an economical greenhouse.                                      The multi-span greenhouse is an upgrade of the greenhouse. It is actually a super large greenhouse, or it can be understood as an expansion. Use scientific means, reasonable design, and excellent materials to connect the original independent single-room model greenhouses. Compared with traditional greenhouses, greenhouses and greenhouses in the form of continuous buildings have a brighter space utilization than traditional greenhouses, and their utilization area is much larger than traditional greenhouses.       How to dehumidify a multi-span greenhouse? Today I will talk to you about this topic. 1. Ventilation and dehumidification. Ventilation is a good way to reduce humidity. Ventilation must be carried out when the temperature is high, otherwise it will cause the indoor temperature of the multi-span greenhouse to drop. If the temperature drops too quickly during ventilation, close the vents in time to prevent the sudden drop in temperature from harming the vegetables.     2. Mulch covering. Covering with plastic film can reduce the evaporation of soil moisture and is an important measure to reduce indoor air humidity.     3. Raise temperature and lower humidity. This method can not only meet the temperature needs of vegetables, but also reduce the relative humidity of the air. When the plants grow to be resistant, water the closed shed to raise the temperature to about 30°C for 1 hour, and then ventilate and drain the moisture. It can be repeated once after 3-4 hours when the shed temperature is lower than 25℃.     4. Use thermal insulation curtain materials with good hygroscopicity. Insulation curtain materials with good moisture permeability and moisture absorption, such as non-woven fabrics, can prevent dew condensation on the surface of the greenhouse and prevent dew from falling on the plants, thereby reducing the air humidity of the multi-span greenhouse.     5. Natural moisture absorption. Materials such as straw, wheat straw, and quicklime can be used to spread between rows to absorb water vapor or fog to achieve the purpose of dehumidification.                               

The choice of greenhouse construction has strong regional suitability and is largely restricted by local climate conditions. Among them, solar radiation, winter temperature, summer temperature, relative humidity of summer air, wind pressure, snow pressure and other conditions that affect the greenhouse Important factors in the safety and economy of greenhouses.                                      1. Temperature. On the basis of understanding the temperature change process in various areas where greenhouses may be built, we focus on estimating the energy consumption that may be required for heating in winter and cooling in summer. When there is no data on the temperature change process, we can focus on a comprehensive analysis and evaluation of the main influencing factors on temperature such as its latitude, altitude, and surrounding mountains, rivers, and forests.     2. Lighting. Light intensity and illumination hours have a very important impact on the photosynthesis of plants in greenhouses and indoor temperature conditions. They are mainly affected by geographical location and air quality. Therefore, the terrain of the greenhouse construction site must be flat and open, in line with tall buildings. Or the distance between protective forest belts should be such that it does not hinder the ventilation and lighting of the greenhouse.     3. Wind speed and direction. Wind speed, direction and distribution of wind bands must also be considered during site selection. For greenhouses that are mainly used for winter production or greenhouses in cold areas, they should be constructed in a leeward and sunny area; greenhouses for year-round production should also pay attention to using the dominant wind direction in summer for natural ventilation; avoid openings or strong winds Build greenhouses in areas to facilitate the safety of the greenhouse structure; avoid building greenhouses in cold areas in winter to facilitate thermal insulation and energy saving in winter; avoid choosing greenhouse construction locations at canyon exits, wind outlets, etc. to prevent excessively strong wind or Floods damage greenhouses, and excessive wind vibration will reduce their service life. Due to the frequent northwest winds in winter, greenhouses should generally be built in the south; large-scale greenhouse groups should choose places with natural artificial barriers in the north, and the other three barriers should be kept at a certain distance from the greenhouse to avoid insufficient light.     4. Snowfall. Structurally speaking, snow pressure is the main load for lightweight structures such as greenhouses. Especially for large and medium-sized multi-span greenhouses where snow drainage is difficult, construction in areas and zones with heavy snowfall should be avoided.                                      5. Hail disaster. Hail is crucial to the safety of ordinary glass greenhouses. The hazards of hail should be determined based on meteorological data and local area surveys, so that ordinary glass greenhouses can avoid being built in areas that may cause hail hazards, or try to keep them in this area as much as possible Build a greenhouse with solar panels.     6. Environmental quality. Air quality mainly depends on the degree of pollution in the atmosphere. The main pollutants in the atmosphere are ozone, perchlorethylene nitrate (PAN), sulfur dioxide, nitrogen dioxide, hydrogen fluoride, ethylene, ammonia, mercury vapor, etc. These pollutions caused by cities, industrial and mining enterprises, etc. have serious harm to plants in different growth stages. In order to ensure that the soil and water sources are not polluted, and thus ensure the high quality of greenhouse products, greenhouse construction locations cannot be selected near factories, downstream of rivers, or downwind from cities. Smoke from burning coal, dust from industry and mining, and dust from dirt roads fall on the greenhouse, which will seriously reduce the amount of light that penetrates the greenhouse; on cold days, the water vapor clouds and mist discharged from thermal power plants into the sky will cause partial shading. Therefore, when selecting a site, you should try to avoid urban polluted areas and choose an area upwind of the areas where the above-mentioned pollution occurs and in an area with good air circulation. Pay attention to whether nearby buildings are affected by highway, industrial and mining dust, and detect the extent of the impact.

With the development of technology, agricultural production methods have also undergone significant changes. In many regions, agricultural production tends to be mechanized. In addition, greenhouses are becoming more and more common, especially in some northern regions.                                     So why do many regions need to build greenhouses? Compared to traditional agriculture, what are the advantages of greenhouse agriculture production methods?   Greenhouses, mainly consisting of large connected greenhouses, have rapidly developed in recent years and can be seen in many places. However, the products grown in different regions also vary. In the south, large greenhouses mainly produce flowers, while in the north, vegetables are mainly grown. Of course, there are also a few greenhouses used for cultivating seedlings.                                        Advantages Of Greenhouse:   In agricultural production in our country, sunlight greenhouses are the main type of facility structure. They can fully utilize solar thermal resources, while also saving resources and reducing environmental pollution. Nowadays, most of them use multi story greenhouses, which can efficiently use land and make environmental regulation very easy.   Greenhouses provide a controlled environment, including temperature, humidity, light, etc., which can solve the regional and seasonal planting restrictions of crops and enrich market supply. Enable people to eat fresh vegetables in winter and various fresh fruits outside of the current season.   Due to the controlled environment and technological support, the growth cycle of agricultural products has been shortened, production risks have been reduced, and farmers' income has been increased. With the continuous improvement and development of facility cultivation technology, as well as the emergence of biotechnology and microcomputer automatic control, labor production efficiency has been greatly improved, resulting in increased yield and quality of cultivation, and improved economic benefits.

 Greenhouses have many profit points, and you can flexibly choose planting and management directions based on local market demand and unique advantages to achieve more economic benefits.   In addition to the traditional cultivation of vegetables, flowers, fruits and other crops, greenhouses also have the following profit points:                                     Cultivation Of Medicinal Materials   Cultivation of medicinal herbs is a profitable way for greenhouses. As people's recognition and demand for traditional Chinese medicine continues to increase, good economic benefits can be obtained by planting some high-value traditional Chinese medicine, such as ginseng, Ganoderma lucidum, and astragalus. The environment of the greenhouse can be adjusted to provide suitable conditions such as temperature, humidity and light, which is conducive to the growth and quality improvement of Chinese medicinal materials.   Edible Fungi Cultivation   The growth of edible fungi requires suitable temperature and humidity conditions, and the greenhouse environment can provide these conditions. Therefore, various edible fungi, such as mushrooms, shiitake mushrooms, king oyster mushrooms, etc., can be grown in the greenhouse. Edible fungi have a short growth cycle, high yield, and large market demand. Growing edible fungi can bring considerable profits.     Breeding   The temperature and humidity conditions in the greenhouse are very beneficial to the growth of some small animals. Birds, fish, etc., such as meat pigeons, egg-laying pigeons, koi, etc., can be raised in the greenhouse. Aquariums, fish ponds and other facilities can be installed in the greenhouse to provide a good growth environment, which is conducive to the growth and reproduction of animals. Breeding animals not only provides food such as meat and eggs, but also provides ornamental value.     Seedling Cultivation   The environment in the greenhouse can be controlled and can provide suitable conditions such as temperature, humidity and light, which is conducive to the cultivation of plant seedlings. In greenhouses, seedlings of various flowers, vegetables and other plants can be grown, and then sold to other farms or plantations, or grown oneself. The demand for seedlings is relatively high, and the price is relatively high, so considerable profits can be obtained.     Sightseeing   The greenhouse has a unique architectural shape and a warm and humid internal environment, making it very suitable for tourism. Various business formats such as park tours, farm entertainment, and parent-child activities can be carried out in the greenhouse to increase tourists' experience and interactivity. At the same time, additional income can also be obtained by selling self-produced vegetables, fruits and other products and other agricultural and sideline products.                                     Plant Flowers   The environment in the greenhouse is suitable for flower growth, and various flowers can be planted, such as roses, carnations, tulips, etc., and different types of flowers can be provided in different seasons to meet market demand. Planting flowers can yield high-value benefits, and at the same time, it can also increase the beauty and ornamental value of the greenhouse.     Grow Green Vegetables   Growing green vegetables in greenhouses is a common way to make money. The environment in the greenhouse can be controlled and can provide suitable conditions such as temperature, humidity and light, which is conducive to the growth and quality improvement of vegetables. Growing green vegetables in greenhouses can achieve pollution-free, pesticide-free cultivation and meet the market demand for green vegetables. At the same time, the price of green vegetables is also higher than that of ordinary vegetables, and you can get good profits.     Grow Fruit   Growing fruits in greenhouses is also a profitable way. Various fruits can be grown, such as strawberries, blueberries, raspberries, etc., and different types of fruits can be provided in different seasons to meet market demand. The quality of fruits grown in greenhouses is better than those grown outdoors, and the price is also higher, so you can get considerable profits.     Greenhouses can be profitable in a variety of ways. Growing high-value agricultural products, breeding animals, traveling, growing green vegetables and fruits, etc. can all achieve considerable economic benefits. At the same time, the environment in the greenhouse can be controlled, which can improve the quality and yield of agricultural products, reduce production costs, and improve market competitiveness.

Secondary salinization refers to the process in which good cultivated land becomes "salinized" due to unreasonable human cultivation and irrigation measures, as well as changes in vegetation.   Saline alkali land is divided into two types of saline alkali soil: saline soil and saline soil, alkaline soil and alkaline soil, based on soil salt content and pH value. Soluble salts (chloride, sulfate, and carbonate) accumulate too much on the surface of the soil, and if the salt content is too high, they are saline soil and saline soil; The surface salt content of soil may not be high, but when the adsorbed sodium ions on soil colloids exceed a certain amount and the pH value exceeds 8.5, it becomes alkaline soil or alkaline soil. In fact, saline soil and alkaline soil are coexisting in agricultural production, commonly referred to as saline alkali soil. Salinization occurs when the salt content in the surface layer of soil (0-20cm) exceeds 0.1% and the pH is greater than 7.5. With the increase of salinity and pH value, the soil surface will exhibit several typical characteristics such as "green", "white", and "red". "green" refers to the growth of green moss; "White" refers to the accumulation of a layer of salt frost on the surface area, while "red" refers to the appearance of "purple algae" on the ground, which is an indicator plant of saline alkali land. Its appearance indicates that the salt content in the soil is already high, reaching around 0.5%, which can cause serious yield reduction   The occurrence of the above three phenomena indicates that the soil has become saline alkali, and the reduction in production generally reaches 20%. At this point, the soil needs to be improved.   After soil salinization, it manifests as soil structural damage, sticky compaction, reduced ventilation and permeability, and slow water infiltration.                                     Prevention and Control Measures for Secondary Salinization in Greenhouses   （1） Scientific fertilization Using formula fertilization technology, nitrogen, phosphorus, potassium, and trace elements are reasonably proportioned according to the fertilizer requirements of different crops and soil nutrient conditions, and promoting root dressing. The application of organic fertilizers, especially bio organic fertilizers made from high carbon raw materials, or the combination of microbial agents can achieve better results. Promote integrated water and fertilizer technology, improve fertilizer utilization efficiency, and reduce surface soil salt accumulation.   （2） Membrane removal and washing According to the principle of "salt comes with water, salt goes with water", use the summer shed period to remove the film, wash with heavy rain, or irrigate with large amounts of water, with a depth of 5-7cm, soak for 3-5 days, and repeat 2-3 times.   （3） Soil conditioning When applying saline alkali soil amendments, it is best to choose multifunctional saline alkali soil amendments that can increase soil organic matter, regulate soil pH, reduce soil salinity, and contain salt tolerant microorganisms.   （4） Deep plowing and deep plowing Regular deep plowing and plowing can loosen the compacted soil in the deep layers of vegetable greenhouses, increase soil aeration, and improve the utilization rate of nutrients in the deep layers of soil.   （5） Biological desalination Planting a crop of fast-growing vegetables or green manure during the summer break in a greenhouse can effectively absorb nutrients from the vegetable field, thereby achieving the goal of reducing soil salt content.   （6） Crop rotation Select vegetables from different families and genera for rotation to prevent soil borne diseases. Adopting a deep root and shallow root vegetable rotation method to avoid excessive consumption of soil nutrients in the same soil layer.   （7） Plastic film coverage By covering with plastic film, the evaporation of soil moisture is reduced, thereby reducing the salt content of the soil surface.                                  

Glass greenhouse is a modern agricultural facility that is characterized by high efficiency, energy conservation, environmental protection, and aesthetics, and is widely used in the field of modern agriculture. Below, we will provide a detailed introduction to the structure, characteristics, advantages, and other aspects of the glass greenhouse.                                 1,The structure of a glass greenhouse   Glass greenhouses are usually made of transparent glass, aluminum alloy profiles, steel, and other materials. Its structural forms are diverse and can be customized according to different needs. Generally speaking, the top of a glass greenhouse adopts a curved or herringbone design to increase space utilization and lighting effects. The side is designed with sliding windows or open and close windows for easy ventilation and operation. The bottom is generally equipped with ventilation openings and shading systems to regulate indoor temperature and lighting.     2,The characteristics of glass greenhouse   1. Efficient: The glass greenhouse adopts full glass coverage, with a light transmittance of up to 80% -90%, which can fully utilize solar energy, improve indoor temperature and lighting, and provide a good growth environment for plants. 2. Energy saving: Glass greenhouses have good insulation performance and can effectively reduce energy consumption. Meanwhile, its ventilation system can regulate indoor temperature and humidity, reducing the occurrence of plant diseases and pests. 3. Environmental protection: The glass greenhouse is made of recyclable materials, which is non polluting to the environment. In addition, its enclosed design can reduce the impact of outdoor environment on indoor environment, improve the growth quality and yield of plants. 4. Aesthetics: The appearance of the glass greenhouse is beautiful and generous, and can coordinate with the surrounding environment. Meanwhile, its internal space is spacious and easy to visit and communicate with.     3,The advantages of glass greenhouses   1. Increase yield: Glass greenhouses can provide a suitable growth environment, promote plant growth and development, and improve crop yield and quality. 2. Cost reduction: Glass greenhouses can effectively reduce energy consumption and labor costs, and improve the efficiency of agricultural production. 3. Increase added value: The agricultural products produced in glass greenhouses have higher quality, which can increase their added value and market competitiveness. 4. Strong adaptability: Glass greenhouses are suitable for different climate and terrain conditions, and can be used for agricultural production in different environments.                                                      4,The application scope of glass greenhouse   Glass greenhouses are widely used in modern agriculture, including the cultivation and production of vegetables, fruits, flowers, seedlings, and other crops. At the same time, it is also applicable to fields such as ecological tourism and scientific research experiments.   In short, glass greenhouses are a modern agricultural facility with characteristics and advantages such as high efficiency, energy conservation, environmental protection, and aesthetics, providing strong support for modern agricultural production. In the future, with the continuous progress of technology and the expansion of application fields, glass greenhouses will play a more important role in modern agriculture.

Working Principle And Classification Of Greenhouse     1. Greenhouses and their working principles   Greenhouses are special facilities that use transparent covering materials and environmental control equipment to create a local microclimate and promote crop growth and development. The function of a greenhouse is to create environmental conditions suitable for crop growth and development for efficient production. The solar radiation, mainly composed of shortwave radiation, enters the greenhouse through transparent materials, causing an increase in indoor ground temperature and temperature, and is converted into longwave radiation. Longwave radiation is then blocked by the greenhouse cover material, forming an accumulation of indoor heat and causing an increase in indoor temperature. This process is called the "greenhouse effect".   Greenhouses utilize the "greenhouse effect" to create a suitable environment for crop growth and increase crop yield by regulating indoor temperature during seasons when crops are not suitable for outdoor growth. But with the advancement of science and technology, greenhouse production has far exceeded the concept of "greenhouse effect". At present, high-tech technology can be used to automatically control and adjust various environmental factors in the greenhouse, including temperature, light, humidity, CO2 concentration, etc. According to the growth habits of crops and market needs, some or even completely break free from the constraints of the natural environment, and humans create a suitable environment for crop growth, producing high-quality and high-yield products to meet the needs of different consumer groups.     2.Types of Greenhouses   Production greenhouses are generally classified based on their transparent covering materials, main structural materials, and greenhouse performance.                                       1. Classification based on greenhouse transparent covering materials   (1) Glass greenhouse   A greenhouse with glass as the main transparent covering material. A greenhouse covered with single-layer glass is called a single-layer glass greenhouse, and a greenhouse covered with double-layer glass is called a double-layer insulated glass greenhouse.   (2) Plastic greenhouse   All greenhouses covered with transparent plastic are collectively referred to as plastic greenhouses. According to the properties of plastic materials, plastic greenhouses are classified into plastic film greenhouses and rigid board plastic greenhouses. Plastic film greenhouses are divided into plastic small arched greenhouses, plastic greenhouses, and large plastic film greenhouses based on their volume size (the latter is usually directly referred to as plastic film greenhouses or plastic greenhouses). To enhance the insulation of plastic film greenhouses, double-layer plastic films are often used to cover them, and greenhouses supported by frames of two layers of plastic films are called double-layer structure plastic greenhouses, A greenhouse with two layers of plastic film separated by inflation in the middle is called a double-layer inflatable greenhouse. Hard board plastic greenhouses are divided into polycarbonate board greenhouses (including polycarbonate hollow board greenhouses and polycarbonate wave board greenhouses), fiberglass (including fiberglass reinforced polyester boards and fiberglass reinforced acrylic resin boards) greenhouses, etc. according to the different types of boards. It should be noted that if the transparent covering material of a greenhouse is not a single material, but is covered by two or more materials, the greenhouse should be classified according to the transparent covering material of the roof, and the final classification should be based on the material with the largest material area on the roof.                                     2. Classification based on the main structural materials of the greenhouse   (1) A bamboo and wood structure greenhouse is a greenhouse that uses bamboo and wood materials such as bamboo, bamboo sheets, and round wood as load-bearing structures for roof beams or indoor columns.   (2) The reinforced concrete structure greenhouse uses reinforced concrete components as the load-bearing structure of the greenhouse roof. Greenhouses with reinforced concrete components as indoor columns and bamboo and wood materials as roof structural components are still classified as bamboo and wood structured greenhouses.   (3) A steel structure greenhouse is a greenhouse that uses steel structural materials such as steel bars, steel pipes, steel plates, or profiles as the main load-bearing structure of the greenhouse.   (4) All load-bearing structures of aluminum alloy greenhouses are made of aluminum alloy profiles. The load-bearing components of the roof are aluminum alloy profiles, but greenhouses supported by steel structures such as beams, trusses, and columns are still classified as steel structured greenhouses.   5) Due to the continuous emergence of new building materials, greenhouses using these materials as load-bearing structures are also emerging, such as glass fiber reinforced cement (GRC) skeleton sunlight greenhouses, steel plastic composite material plastic greenhouses, etc.                                          3. Classification based on greenhouse performance   (1) Plastic shed   A single arch greenhouse made of plastic film as a transparent covering material is called a plastic greenhouse. Plastic greenhouse is the simplest type of greenhouse and currently has the largest number of greenhouse types in China.   (2) Sunlight greenhouse   It is a greenhouse with three insulated walls facing east, west, and south, and a curved skylight facing south. The biggest advantage of this type of greenhouse is its good insulation performance. Currently, it is the most widely available greenhouse style in the northern and northeastern regions of China.   (3)Multi-span greenhouse   A Multi-span greenhouse is a greenhouse that connects single span greenhouses. According to the roof form, Multi-span greenhouses can be divided into pointed roof greenhouses, circular arch greenhouses, serrated roof greenhouses, flat roof greenhouses, and shaped roof greenhouses. The biggest advantage of multi story greenhouse is its large indoor space, high space utilization rate, and high degree of mechanization. It is currently the most commonly used greenhouse style in developed countries and also the future development direction of greenhouse in China.

Project Overview:   Location: Philippines Time:2019 Climate: Hot and humid, with temperatures ranging from 30-40℃ Usage: Vegetables growing Greenhouse Type: Peach peak arch greenhouse Quantity: 4 units Dimensions: Length - 36 meters, Width - Inner arch 9 meters, Outer arch 10 meters Skeleton Material: Hot-dip galvanized steel pipe Covering Material: White inner sunshade film, out transparent polycarbonate sheet

Project Overview: Location: Thailand Climate: Hot and humid, with temperatures ranging from 30-40℃ Usage: Cannabis cultivation Greenhouse Type: Double-layer arch-blackout greenhouse Quantity: 4 units Dimensions: Length - 36 meters, Width - Inner arch 9 meters, Outer arch 10 meters Skeleton Material: Hot-dip galvanized steel pipe Covering Material: White outer sunshade film, inner transparent film Innovative Greenhouse Systems: External Sunshade System: Our greenhouses are equipped with a state-of-the-art external sunshade system utilizing a white sunshade net. This system not only provides shade but also reflects a portion of the sunlight's heat, significantly cooling the interior environment. Double-Layer Insulation System: Embracing an inner and outer double-layer design, our greenhouses create a thermal insulation layer in between. This cutting-edge design effectively reduces energy consumption, ensuring optimal conditions for cannabis cultivation. Internal Blackout System: Our project is the fully automatic blackout system inside each greenhouse. This system carefully regulates lighting conditions, guaranteeing the ideal environment for the growth of cannabis plants. Air Conditioning System: To maintain the perfect indoor temperature, each greenhouse is equipped with circulation fans. These fans efficiently cool down the interior, ensuring that the cannabis plants thrive in an environment tailored to their needs. Project Installation: We have a professional construction team and experienced project engineers.This case we provide 1 professional engineer to provide on-site installation guidance, and 7-8 local construction workers. The overall construction period is 1 month.

Hunan Shimen modern agricultural science and technology exhibition center with a total investment of 13.5 million yuan, covers an area of 15 acres, greenhouse planning and construction area of 4110.72 square meters, with a total construction area of 5000 square meters, the project has started construction in July 2020 and fully completed in 2021. The greenhouse selects Venlo structure type, the top of the showroom adopts cream locking shape PC board, the top of the greenhouse adopts 5mm tempered glass, surrounded by 5+6+5 hollow float glass, the skeleton is double-sided hot-dip galvanized steel skeleton, the steel zinc layer is above 220g/㎡ (surface spray paint), the interior is equipped with external shading system, internal shading system, natural ventilation system, cooling system, IOT intelligent control system, Electric control system and power distribution system, etc., set modern intelligent agriculture, leisure agriculture, new energy, tourism and recuperation as one of the field complex demonstration garden, after the completion of the project, the development of the local modern fruit and vegetable industry, enhance the modernization of agricultural production and promote the development of modern agricultural experience tourism has a positive role.

Among the cultivation facilities, the intelligent multi-span glass greenhouse is suitable for use in various regions and climatic conditions as a long-lasting form. Glass greenhouses are costly and highly subsidized, and are currently used mostly for scientific research, sightseeing, and restaurants. The advantages are broadly as follows. 1、Large lighting area, uniform light ; 2, the use of a long time, the strength is relatively high ; 3, has a very strong anti-corrosion, flame retardant ; 4, 90 to light transmission, and does not decay with time. In the industry, the span size and opening size can be divided into different construction modes, and different use modes can be divided into: vegetable glass greenhouse, flower glass greenhouse, seedling glass greenhouse, ecological glass greenhouse, scientific research glass greenhouse, three-dimensional glass greenhouse, irregular glass greenhouse, leisure glass greenhouse, intelligent glass greenhouse, etc.