Film cover cultivation - white revolution

film cover cultivation, that is, transparent plastic film covering the ground, sowing under the membrane and protecting the growth of crop seedlings;measures in low-temperature cold, low-calorie areas to increase temperature preservation, increase production and income effect. Generally speaking, it is equivalent to extending the growing season for crops by 20 to 30 days. In winter and spring, the ground temperature increases by 2 to 4 degrees C, and the temperature of the near-ground layer increases by 4 to 8 degrees C, and the hot summer can reduce the temperature of the film interior. The coating reduces the evaporation of soil moisture and also plays the role of water storage preservation. Fertilizers planted into the soil under the protection of the film will not be lost due to wind, sun and rain, and will effectively control the growth of weeds. Colorless film reflects light with a strong ability to increase sunlight 10% from 15 cm above the ground and improve the photothermal conditions of the near-ground gas layer. Mulum cultivation also promotes soil
bial
activities, accelerates the decomposition of
organic
substances, improves the physical and chemical structure of soil, and creates a suitable ecological environment for crop growth.cultivation has become an important measure to increase agricultural production in the world, but the fastest development, the largest area, the best effect will be counted as China. China's mulberry cultivation from cold areas to the suburban plains, from fruit and vegetable crops to grain and cotton crops, significantly improve the efficiency of labor, emergency access to agriculture, save land, less investment, high efficiency. In the 1990s, The cultivation area of crop mules in China reached more than 60 million mu. Especially in the cold and cold areas, the effect of increasing production is more significant, known as the mountainous areas out of poverty and get rich "food and clothing project."is located in the high cold and cool areas of northern Fujian, cold climate, short growth, has long been a corn production "no-go zone", the general year of corn can not mature, the use of mulp cultivation, increased the effective accumulation of temperature, corn in the local can be safely matured, yield per acre reached 400 to 500 kg. In the dry-growing areas of Gansu Province, wheat mulum-covered cave-sowing technology has been adopted to solve the problem of water shortage and insufficient heat, and to achieve water-saving and high-yield cultivation, with wheat yield of more than 500 kg per mu.use of plastic film in agriculture, the problem of pollution of farmland caused by waste has attracted more and more attention. Because polyethylene or PVC in plastic residues contain toxic substances, harmful to livestock and poultry and soil microorganisms. In the 1990s, scientists succeeded in using agricultural by-products as raw materials for agricultural degradation films or starch films, which also added
herbicides
and various nutrients. Covering the agricultural film with the growth of crops and temperature increase by microbial degradation and gradually seep into the soil, not only to completely solve the problem of soil pollution, but also to prevent weeds potions and roots to absorb nutrients.cultivation is a model of the combination of traditional fine agronomy and modern science and technology in China. British scientists, after examining China's achievements in the development of mulum cultivation, marveled that the modern plastics industry revolution originated in Europe and was popular with Japan, but first of all, it bloomed brilliant flowers in China's agricultural production, which will undoubtedly have a profound impact on the future development of agriculture.