Drip irrigation system is one of the most suitable for solar greenhouse irrigation, time-saving, provincial irrigation system, is currently widely used in the world and promote.

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MULTI SPAN GLASS GREENHOUSE FROM CHINA JIANDA FACTORY TO EXPORTED.
OUR GREENHOUSE WITH 20 YEARS WARRANTY FOR THE STEEL FRAME BODY.

we designed the multi span sawtooth greenhouse covering 150 micron film for grow vegetables

Glass intelligent greenhouse, refers to the glass as a lighting material greenhouse, belongs to a greenhouse greenhouse in the cultivation facilities, glass greenhouse as the longest service life of a form, suitable for a variety of regions and a variety of climatic conditions under the use of intelligent.

Tomato is a temperature-loving vegetable. Under normal conditions, its optimal growth and development temperature is 15℃--29℃, and the suitable temperature for photosynthesis is 20--25℃. When the temperature is lower than 15°C, it cannot bloom, or pollination and fertilization are poor after flowering, resulting in physiological disorders such as flower and fruit drop; when the temperature is lower than 10°C, the plant stops growing; when the temperature is lower than 5°C, it will cause low temperature damage over time; -2°C ~-1℃, it can be frozen and die in a short period of time; when the temperature is higher than 30℃, its assimilation effect is significantly reduced; when the temperature is higher than 35℃, flowering and fruiting are inhibited, and reproductive growth is interfered with or destroyed; short-term High temperatures of 40°C will also interfere with physiological growth, leading to flower and fruit drop or poor fruit development.

What is the cost of a commercial polycarbonate greenhouse?

sawtooth roof greenhouses are divided into three types: fully serrated, sharp serrated and blunt serrated according to the different forms of roof serrations. The corresponding structural forms are also different. The sawtooth openings of the fully sawtooth roof are set up vertically from the roof ridge to the gutter. According to the shape of the roof, fully sawtooth roof greenhouses can be divided into pitched roof sawtooth greenhouses and arched roof sawtooth greenhouses. Regardless of the roof type, the greenhouse structure generally connects the columns directly to the greenhouse roof, and forms a slope roof or semi-circular arch roof from the roof ridge to the gutter. The sawtooth opening of the sharp sawtooth roof is from the ridge of the greenhouse to the middle of the greenhouse roof. If the greenhouse ridge is in the middle of the span, an asymmetrical greenhouse roof with high and low ridges can be formed. When the roof ridge is in the middle of the span, vertical poles can be set on the horizontal tie rods of the columns to connect with the left and right roof arches to form mid-span sawtooths. Columns can also be set up in the middle of the greenhouse span, and the tops and middle upper parts of the columns are connected to the two columns respectively. The roof arch bars on the side form saw teeth in the middle of the span. The former has fewer indoor columns and a large working space, while the latter has high structural strength. The greenhouse arch pole can completely adopt the arch pole method of the round arch roof.

There is also a structure in the form of main and auxiliary beams in the arched circular structure greenhouse. The main beams are directly connected to the columns, and the secondary beams are connected to the gutters. The main beam spacing is the bay size of the greenhouse, which is generally 3~4m. Some greenhouses have the same main beam and auxiliary beam structure, and the main and auxiliary beams are spaced apart; some greenhouse auxiliary beams only use a simple arch rod, and 2 to 3 auxiliary beams are generally set between every two main beams. An extreme variation of this structure is that there are no main beams on the entire roof, which is called a full lead beam structure. It is similar to a floor-standing plastic greenhouse installed on the gutter. In this form, the spacing of the arch poles is usually within 1m.

Plastic greenhouse structure form 1. The dome structure is the most commonly used building shape of plastic greenhouses, but there are many structural forms that make up this building shape. This kind of greenhouse has a simple structure, clear stress, and large amount of materials. It is widely used in areas with small wind loads. The characteristic of this form of greenhouse structure is that it has horizontal tie rods, which affects the internal space of the greenhouse to a certain extent and limits the height of the greenhouse. For this reason, an improved roof beam structure came into being. In fact, the existence of horizontal tie rods can not only reduce the horizontal thrust of the arch rods on the columns, but also provide convenience for indoor installation of sunshade curtains, circulation fans, and hanging crops. Another form is to use the Venlo-type glass greenhouse structure, fully consider the role of horizontal tie rods, and evolve it into a horizontal truss, which not only facilitates the installation and hanging of indoor equipment, but also greatly simplifies the upper arch. Like the traditional Venlo-type greenhouse, two or three small roofs can be installed on the horizontal frame, which not only greatly reduces the cross-sectional size of the arch, making the installation more convenient and faster, but also makes the indoor lighting fractal more uniform.

In general, the unit size and overall size of a greenhouse are used to describe the architectural size characteristics of a greenhouse. (1) Unit size of a greenhouse The unit size parameters of a greenhouse mainly include span, bay, eaves height, ridge height, etc. ① Span: The horizontal distance between the axes of two adjacent columns in the greenhouse in the direction of the vertical gutter. Usually, the specifications of the greenhouse span are 6.00 m, 6.40 m, 7.00 m, 8.00 m, 9.00 m, 9.60 m, 10.80 m, and 12.80 m. ② Bay: The horizontal distance between the axes of two adjacent columns in the greenhouse along the gutter direction. Usually, the specifications of the greenhouse bay are 3.00 m, 4.00 m, 4.50 m, and 5.00 m. ③ Eaves height: The vertical distance from the indoor floor elevation to the eaves under the gutter. Usually, the specifications of the greenhouse eaves height are 3.00m, 3.50 m, 4.00 m, 4.50 m, 5.00m, 5.50 m, 6.00 m, 6.50 m, and 7.00 m. ④ Ridge height: The distance between the indoor floor elevation of the greenhouse and the highest point of the greenhouse roof truss. It is usually the sum of the eaves height and the roof height. (2) The overall dimensions of the greenhouse and the scale of the greenhouse The overall dimensions of the greenhouse mainly include the length and width of the greenhouse. ① Length: refers to the total length of the greenhouse in the direction of the larger overall size ② Width: refers to the total length of the greenhouse in the direction of the smaller overall size, ③ Total height: refers to the distance between the indoor floor elevation of the greenhouse and the highest point of the greenhouse. The highest point can be the highest point of the greenhouse or the highest point of other components outside the greenhouse roof (such as the external shading system, etc.).

Greenhouses have come a long way since their humble beginnings, evolving from simple structures to sophisticated technological marvels. This journey reflects the ever-changing needs of agriculture, horticulture, and our quest for a sustainable future. In ancient times, the concept of a controlled environment for plant growth can be traced back to the Roman Empire. The Romans built rudimentary structures known as "specularia," which were used to grow exotic plants. These early greenhouses were essentially large rooms with transparent materials, such as mica or oiled cloth, to allow sunlight to enter. However, they were mainly used for the pleasure of the wealthy and did not have the advanced features we associate with modern greenhouses. During the Middle Ages, the art of growing plants in controlled environments was largely forgotten. It wasn't until the Renaissance that interest in horticulture was rekindled. Wealthy nobles and scholars began to build small gardens with glass-covered enclosures to protect delicate plants from the harsh elements. These early glasshouses were still relatively simple in design but marked the beginning of a new era in plant cultivation. Today, greenhouses are an integral part of modern agriculture and horticulture. They come in a wide variety of sizes and designs, from small backyard hobby greenhouses to large commercial operations. Advanced technologies such as computerized climate control, LED lighting, and hydroponics are being used to optimize plant growth and maximize yields. Greenhouses are also playing an important role in sustainable agriculture by reducing water consumption, minimizing pesticide use, and enabling year-round production in areas with harsh climates.

Application prospects of soilless cultivation (I) Urban agriculture With the acceleration of urbanization, the urban population continues to increase, and urban land resources are becoming increasingly scarce. Soilless cultivation can be carried out between high-rise buildings, balconies, roofs and other spaces in the city, providing fresh vegetables and fruits for urban residents and achieving sustainable development of urban agriculture. (II) Desert Agriculture The desert area has poor land and scarce water resources, making traditional agricultural production difficult to achieve. Soilless cultivation can utilize the abundant solar energy resources in the desert area and achieve sustainable development of desert agriculture through the recycling of nutrient solution. (III) Island agriculture Island areas are far away from the mainland, with inconvenient transportation and difficult material supply. Soilless cultivation can be used for planting on islands, providing island residents with fresh vegetables and fruits, and achieving sustainable development of island agriculture IV) Space Agriculture As human beings continue to explore space, space agriculture has become an important development direction for future agriculture. Soilless cultivation can be carried out in the space environment, providing astronauts with fresh food and achieving sustainable development of space agriculture. As an important innovation in modern agriculture, soilless cultivation is leading agriculture into a new era with its unique advantages and broad development prospects. Soilless cultivation can improve land utilization, save water resources, improve the quality of agricultural products, and achieve sustainable development of agriculture. It has important practical significance and application value. With the continuous advancement of science and technology and people's increasing attention to food safety and environmental protection, soilless cultivation technology will continue to