Application Of Agricultural Non-Woven Fabrics In Vegetable Production

　　 Non-woven fabrics Also known as the harvest cloth. It is a long fiber nonwoven fabric, which has good permeability, hygroscopicity and transmittance. New covering material 。 Nonwovens are thin, thick and thickened. They are usually represented by the number of squares per square meter, such as 20 grams of non-woven fabric per square metre, 30 grams of non-woven fabric per square meter, 40 grams of non-woven fabric per square meter, and so on. The thickness of the non-woven fabric is different from that of the non-woven fabric. The permeability, the shading rate and the ventilation degree are different, and the covering methods and uses are also different. Generally, 20 to 30 grams / square meter of thin non-woven fabric has higher water permeability and aeration, lighter quality, and can be used for covering the open surface and greenhouse and the floating surface in the greenhouse. It can also be used for thermal insulation curtain in the small arch shed, greenhouse and greenhouse, and it can raise the air temperature by 0.7 ~ 3 degrees at night. 40 to 50 grams / square meters of non-woven fabrics in the shed with low water permeability, large shading rate and heavier quality, are generally used as greenhouse curtain and greenhouse curtain, and can also replace the straw curtain cover outside the shed to enhance the thermal insulation function. This kind of greenhouse is also suitable for shading and seedling cultivation in summer and autumn. Thickening non-woven fabric (100~300 g / m2) instead of straw curtain and straw mat, together with agricultural film, will carry out multi-storey coverage in greenhouse and greenhouse. According to the research, covering the greenhouse with non-woven cloth is better than covering grass curtain for thermal insulation effect, and is lighter than grass curtain, easy to manage, and is expected to achieve mechanization or Semi mechanized Uncover.

Non-woven fabrics have been widely used in developed countries such as Japan, the United States, Holland, Canada and so on. China's introduction of non-woven technology is not long. At present, there are few products and specifications, and the price is high. The quality is two different from that of foreign similar products. At the same time, the research and promotion work of covering technology is not enough. But with the improvement of non-woven production technology and the further improvement of covering technology, non-woven fabrics will be widely used in the development of vegetable Off-season Cultivation.