The correct way to cover non-woven fabrics in agricultural greenhouses in winter (pure dry goods sharing)

Generally in winter, warm-loving eggplants, melons, beans and other off-season vegetables are grown in greenhouses. Commonly used methods are to cover with multiple layers of plastic film or cover with shading nets and straw flakes. If only covered with multiple layers of plastic film, although the effect of heat preservation is particularly good, the humidity in the shed is relatively high, which may cause leaf disease or rot of the pulp. The technicians used long-fiber non-woven fabrics for experiments, and then covered a layer of non-woven fabric on the small shed in the big shed. The heat preservation performance has achieved particularly good results. Covering with plastic film and non-woven fabric (specification 80-100 g/m2) has a good thermal insulation effect, and the temperature in the shed can be kept above 8 ℃ during the growth of vegetables. The detailed method is: cover the uneven ground with mulch, cover the trench with straw, and then build a small shed or middle shed in the big shed according to the plant size of melons, eggplants and other vegetables. When it gets dark, cover it with a layer. For non-woven fabric, cover it with a layer of plastic film, or cover the film first and then the non-woven fabric. When the weather drops to 0~-2℃, the temperature in the shed can be maintained at least above 8℃; if there is a cold current, you can also cover it with a layer of non-woven fabric and film, even if the weather is -5℃ Below, the temperature in the shed can still be kept above 5°C. Using this method to maintain the temperature can allow eggplants and melons in the greenhouse to grow and bear fruit normally in winter. The moisture absorption effect is strong, and there are no water droplets on the leaves of the crops in the non-woven shed, which can prevent or reduce leaf diseases and rot. Sunlight during the day, the water vapor in the non-woven fabric evaporates, and it can absorb the moisture emitted by the crops in the shed at night. According to surveys in recent years, vegetables are rarely diseased.