Agriculture tunnel greenhouse with plastic film

Maintenance and upkeep of vegetable steel greenhouse

Maintenance is conducted when steel greenhouses are idle. The best frequency is once a year. To avoid rusted steel frame, steel frame should be painted anti-rust painting once a year, particularly in places that are already rusted, prone to go trust and connecting parts of steel frames. If fractured steel frame and connecting pieces arise during the maintenance, they should be timely replaced in order to avoid collapse of greenhouses. Moreover, in case of wind, heavy rain and so forth during production, collapsed steel frames should be timely strengthened and replaced. When much ponding is found in the ceiling, artificial water drainage is in need.

Both weather and temperature should be taken into account during production. Coverage film should be timely uncovered using flat and blunt objects in case that membrane is scratched. If cleft is found when sorting out the thin membrane, dispatch it with transparent adhesive tape. Membrane is usually replaced once every two to three years. It is suggested that new film be in use for growing seedlings in winter.

Production and management of vegetables in steel frame greenhouses

Production and management of vegetables in steel frame greenhouses includes temperature, sunlight, water, fertilizer and control of insects. During winter and spring, cultivation is dominated by heat rise to facilitate growth. During summer and autumn, it is dominated by prevention of raindrops.
In order to make better use of light, the requirements of the greenhouse film should be light, no drops, eliminate fog and other functions, film clean dust, to ensure that the film through the light. The average film transmittance of 70% to 80%, better quality of the film through the light transmission rate of 85% or more, with the extension of the time, film aging, dust accumulation, light transmission rate decreased, it is recommended that every 2 to 3 years to replace a film. According to the greenhouse temperature changes and suitable varieties of vegetable growth temperature requirements, strengthen the greenhouse temperature regulation and management, the shed temperature control at 25 ~ 30 ℃. Under normal circumstances, the higher the temperature outside the shed, the greater the temperature within the shed, the shed outside the temperature is low, small value within the shed; sunny day temperature difference is large, rainy day temperature difference is small, the higher the temperature, the greater the temperature difference The lower the temperature difference between the smaller.




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