Shade net, also known as cool yarn, cool yarn, is a lightweight, high-strength, polyolefin resin as the main raw material, adding appropriate light stabilizers, antioxidants and a variety of pigments, etc., made by drawing after melting , Anti-aging plastic woven mesh. After covering, it can play a variety of functions such as cooling, shading, sheltering from rain, wind protection, bird protection, moisturizing and drought resistance, warming and preventing frost. Compared with ordinary curtains, bamboo curtains, straw curtains, it has the advantages of long life, light weight, easy operation, convenient cutting and splicing, convenient storage, small size, labor saving and labor saving. At present, as a new type of covering material, sunshade nets are widely used in vegetable production as well as agricultural plastic films, and are mainly used in the summer and autumn high-temperature seasons, and are expanded to annual use. They are indispensable auxiliary materials for the annual use of greenhouse facilities. Shade net investment 600-700 yuan per mu, available 4 to 6 per year, can be used for more than 3 years, the cost per mu per mu is only 40 to 60 yuan. With the continuous development of production, the scope of application of shade nets has also expanded from vegetable production to flower seedlings, edible fungi, animal husbandry, and aquatic products, and it has become more diversified in terms of coverage. There are many types of shade nets, which should be selected according to different needs during the cultivation. colour. Commonly used shade nets are black, silver grey, blue, yellow, green and many others. It is most commonly used in vegetable-covered cultivation in black and silver grey. The shading and cooling effect of the black shading net is better than that of the silver-gray shading net. Generally, it is used in crops with low heat and high temperature and low light requirements and less harmful to the virus, such as autumn cabbage, baby food, Chinese cabbage, and celery. Cover cultivation of green leafy vegetables such as parsley and spinach. Silver-gray shading nets have good light transmission and avoiding choking. They are generally used for the cultivation of early summer and early autumn seasons, as well as for crops that are highly susceptible to light and susceptible to viral diseases, such as radishes, tomatoes, and peppers. For winter and winter frost cover, black, silver shade net can be, but silver shade net is better than black shade net. Shading rate. In the weaving process, the shade net can adjust the density of the weft so that the shading rate can reach 25% to 75% or even 85% to 90%. In cover cultivation, they can be selected according to different needs. Summer and autumn cover cultivation, the requirements of light is not too high, non-high-temperature cabbage and other green leafy vegetables can use high shading rate shade net. The lighting requirements are relatively high, and the shade vegetables with lower shading rate can be selected for fruits and vegetables that are more resistant to high temperatures. Antifreeze and frost protection are covered in winter and spring, and the effect of shade net with high shading rate is good. In general production applications, shade nets with a shading rate of 65% to 75% are generally used. When covering and using, it should be adjusted according to different seasons and weather conditions by changing the cover time and adopting different covering methods to meet the growth needs of different crops. Width. The general product range is 0.9 meters to 2.5 meters, the widest is 4.3 meters, and some manufacturers can also be customized according to need. At present, the use of 1.6 meters and 2.2 meters is more common. In covering cultivation, multiple splicing is used to form a large-area whole-slab cover, which is convenient for uncovering the cover when in use, convenient for management, labor-saving, labor-saving, and easy to fix, and is not easily blown by strong winds. According to the coverage of the length and width of the selected shade of different sizes to splicing. When cutting the shade net, cut the mouth with a soldering iron. When splicing, do not use cotton thread, nylon thread suture should be used to increase the splicing firmness.
Black Garlic Fermentation Machine, independent research and development of precise structure, fast heating speed, high precision of temperature control, automatic temperature control, timing system, dual temperature alarm device. Can be customized according to customer requirements, reasonable structure, high thermal efficiency, energy saving, simple operation, easy maintenance, improve production efficiency and product quality. The noise is small, smooth operation.
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