Shade net is a new kind of agricultural plastic covering material which is lightweight, high-strength and anti-aging, which is made of polyolefin resin as the main raw material, anti-aging agent and various color materials. Sunshade net covering cultivation, with shading, humidity control, moisture protection, anti-rainstorm, anti-wind, antifreeze, pest prevention and other effects.
The shading nets have 75% and 45% shading rates, and the high shading rate is only suitable for use on flowers and shade-tolerant vegetables. Generally, 45% shading nets are commonly used for producing vegetables.
Celery, Chinese wolfberry, and onions and garlic are used to produce cold and low-light vegetables in summer and autumn. The use of black shade nets such as SZW-12 and SZW-14, which have a high shading rate, mainly covers the production.
Tomatoes, cucumbers, eggplants, peppers and other thermophilic mid- and high-glossy vegetables are produced in summer and autumn. Silver shade nets or black shade nets with low shading rate such as black SZW-10 are selected depending on the light intensity; avoiding radon and antivirus diseases, most Good choice of SZW-12, SZW-14 and other silver gray network or black and gray color shade net coverage.
Spinach, asparagus, Wuxu and other cold-resistant, semi-cold leafy winter coverage, the use of silver shade net is conducive to moisturizing anti-frost.
Short-term coverage of nursery seedlings or seedlings in the fall, mostly covered with black shade nets. In order to prevent virus diseases, silver gray net or black and grey shade nets can also be covered.
For all-weather coverage, screens with a shading rate of less than 40%, or black-and-grey color screens should be selected; shaders with high shading rates such as SZW-12, SZW-14, etc., can also be used to cover 30-50 centimeters, or erected. Narrow small flat cover.
Nuts can generally be divided into two types: one is seeds, such as sunflower seeds, pumpkin seeds, peanuts, etc.; the other is tree nuts, such as pistachios, hazelnuts, cashews, walnuts, pine nuts, walnuts, chestnuts, almonds. And the macadamia and pecans that have been very hot in the past two years. These nut foods contain more protein, calcium and a variety of vitamins, which can provide the body with a variety of nutrients needed by the brain and body.
In general, a nut is a closed fruit classification of a nutrient-covered woody or leathery hard shell. The skin is hard and contains one or more seeds. It includes two types of tree nuts and fruit seeds, walnuts, chestnuts, pistachios, almonds, etc., which belong to the fruit seed class.
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