The mulching can keep the soil moisture, maintain the soil suitable humidity, and increase the volumetric heat capacity of the soil in the cultivating layer. It is easy to adjust the temperature difference between day and night in the greenhouse, so that the temperature in the shed will not increase too quickly, the temperature will not be too high, and the shed temperature in the night will decline slowly. The temperature is not too low.
The cover film can reduce the evaporation of surface moisture, which can reduce the air humidity in the shed, which is conducive to disease prevention, and can alleviate the contradiction between air release and heat preservation.
Plastic film cover avoids direct contact between certain pathogens and pests and soil, and can effectively prevent certain soil-borne diseases and underground pests.
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