First, film selection
The greenhouse covering material cultivated in winter and spring is ideal for selecting EVA (polyethylene-vinyl acetate) non-drip anti-aging multi-functional film, and its light transmittance, heat retention and dripping properties are obviously better than ordinary functional films. In the process of production management, it is necessary to strengthen the management of light. Under the premise of conducive to heat preservation, the film should be uncovered as soon as possible, and more light should be seen to prolong the time of receiving light. In the daytime, the cover in the greenhouse should be uncovered at any time, and rainy days are no exception.
Second, insulation
There are many rainy and rainy weathers in winter in our province. The lack of light and heat resources in winter greenhouse production has increased the difficulty of production. Tomatoes, eggplants, melons, melons and other vegetables and melons are cultivated in winter. Multi-layer cover insulation technology can be used to increase the temperature in the greenhouse and effectively overcome the low temperature barriers in winter. The use of "three sheds and four membranes" (green shed + medium shed + small shed + mulch) multi-layer cover insulation, plus the use of high-insulation EVA greenhouse film, winter night, the temperature difference between the inside and outside of the shed can reach about 5 °C. In addition to the film, straw curtains, shade nets, etc. can also be used to heat the greenhouse. In recent years, the tomato and eggplant in Jiashan, Changxing and other places in our province have been cultivated in winter, and the "greenhouse + medium shed + medium shed + mulch film" mode has been adopted to achieve better insulation effect.
Third, fertilizer and water gas regulation
In the production of facility vegetables, the traditional irrigation method is not conducive to high quality and high yield, and is easy to cause vegetable diseases. The application of drip irrigation technology not only has high irrigation quality, but also reduces water and fertilizer loss, and can also reduce internal air humidity and reduce the occurrence of vegetable diseases. The greenhouses in the production of greenhouse vegetables in winter are often closed, which is likely to cause serious shortage of CO2 in the greenhouse. The application of CO2 in greenhouse vegetables can promote the healthy growth of plants, accelerate the growth and development of vegetables, and ripen the fruits, which has obvious effects on improving the quality of melons, increasing yield and improving disease resistance of crops. The application of CO2 in fruit and vegetable vegetables during the flowering and fruiting period can reduce the fruit drop, increase the fruit setting rate and promote fruit growth.
The greenhouse covering material cultivated in winter and spring is ideal for selecting EVA (polyethylene-vinyl acetate) non-drip anti-aging multi-functional film, and its light transmittance, heat retention and dripping properties are obviously better than ordinary functional films. In the process of production management, it is necessary to strengthen the management of light. Under the premise of conducive to heat preservation, the film should be uncovered as soon as possible, and more light should be seen to prolong the time of receiving light. In the daytime, the cover in the greenhouse should be uncovered at any time, and rainy days are no exception.
Second, insulation
There are many rainy and rainy weathers in winter in our province. The lack of light and heat resources in winter greenhouse production has increased the difficulty of production. Tomatoes, eggplants, melons, melons and other vegetables and melons are cultivated in winter. Multi-layer cover insulation technology can be used to increase the temperature in the greenhouse and effectively overcome the low temperature barriers in winter. The use of "three sheds and four membranes" (green shed + medium shed + small shed + mulch) multi-layer cover insulation, plus the use of high-insulation EVA greenhouse film, winter night, the temperature difference between the inside and outside of the shed can reach about 5 °C. In addition to the film, straw curtains, shade nets, etc. can also be used to heat the greenhouse. In recent years, the tomato and eggplant in Jiashan, Changxing and other places in our province have been cultivated in winter, and the "greenhouse + medium shed + medium shed + mulch film" mode has been adopted to achieve better insulation effect.
Third, fertilizer and water gas regulation
In the production of facility vegetables, the traditional irrigation method is not conducive to high quality and high yield, and is easy to cause vegetable diseases. The application of drip irrigation technology not only has high irrigation quality, but also reduces water and fertilizer loss, and can also reduce internal air humidity and reduce the occurrence of vegetable diseases. The greenhouses in the production of greenhouse vegetables in winter are often closed, which is likely to cause serious shortage of CO2 in the greenhouse. The application of CO2 in greenhouse vegetables can promote the healthy growth of plants, accelerate the growth and development of vegetables, and ripen the fruits, which has obvious effects on improving the quality of melons, increasing yield and improving disease resistance of crops. The application of CO2 in fruit and vegetable vegetables during the flowering and fruiting period can reduce the fruit drop, increase the fruit setting rate and promote fruit growth.
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