Applications and advantages of non-woven fabrics in agriculture
As a new type of covering insulation material, non-woven fabrics are used in greenhouse vegetable production and have achieved good economic benefits. It has several benefits in agriculture:
1. Insulation. The transmittance of non-woven fabrics for long-wavelength light is lower than that of plastic films. Because the heat dissipation in the radiation area at night mainly relies on long-wave radiation, the covering effect is outstanding.
2. Breathable and humidity control. The non-woven fabric is made of filaments laid on each other into a mesh, with a high void ratio, which can be breathable, water-permeable, and automatically adjust humidity.
3, shading and cooling. Covered with colored non-woven fabrics, it has the effect of shading and cooling. Different colors of non-woven fabrics have different shading and cooling effects. The shading effect of black is better than yellow, and yellow is better than blue.
4. Anti-aging. The agricultural non-woven fabric has undergone anti-aging treatment, and the thicker the fabric, the lower the strength loss rate.
Through the application practice of vegetable farmers, non-woven fabrics are mainly used in the following aspects in greenhouse vegetable production:
Used at the bottom of thatch as a 'secondary' thermal insulation material. The shed surface of many shanty houses is not only covered with grass thatch, but also adds a layer of non-woven fabric to the bottom of the grass thatch. According to vegetable farmers, by adding 'two-way' thermal insulation material (non-woven fabric), the thermal insulation performance of the greenhouse can be significantly improved, which is 2°C-3°C higher than that of simply covering grass, which is beneficial to the growth of vegetables. In addition, the application of non-woven fabrics on the shed where the roller shutter machine is used can also protect the thatch and prolong its service life.
Used on the back wall of the greenhouse as a 'slope protection' rainproof material. The entire rear wall is wrapped with multiple non-woven fabrics and fixed with steel wire, which can reduce the heat loss of the rear wall; it can prevent rain and snow, and protect the wall;
Other applications. It is used in the production of watermelon in multi-film covered arched sheds in early spring.
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