let us learn what is Mulching filmlet us learn what is Mulching film
Mulching film is the ground covering film, usually transparent or black PE film, also green and silver film, which is used for ground covering to improve soil temperature, maintain soil moisture, maintain soil structure, prevent pests from invading crops and diseases caused by some microorganisms, and promote plant growth.
The mulch seems to be a thin layer, but it has a great effect. It can not only improve the soil temperature, water, soil and fertilizer, but also kill grass, prevent diseases and pests, prevent drought and waterlogging, suppress salt and protect seedlings, improve the near surface light and heat conditions, and make the products clean. For those newly unearthed seedlings, it can protect roots and promote growth. For the three north areas of China, the factors that restrict the development of agriculture, such as low temperature, little rain, drought and poor ridge, and short frost free period, have strong pertinence and applicability, and also play a role in the cultivation of two season rice seedling and a variety of crops. It has been popularized and applied in 31 provinces, cities and autonomous regions in China. It is used in more than 40 kinds of crops, such as grain, cotton, oil, vegetables, melons and fruits, tobacco, sugar, medicine, hemp, tea, forest, etc. it has generally increased the yield of crops by 30% - 50%, and increased the value by 40% - 60%, which is welcomed by farmers.
The effect of mulching film on soil temperature, soil and fertilizer
▪ side effect
4 new technology
▪ Features and advantages
Mulch plastic film
Explanation: the ground is covered with film.
In the early 1970s, some areas in China used the waste common agricultural film to carry out small-scale cultivation experiments on vegetables, cotton and other crops, and achieved some results, but it was not popularized due to economic and technical reasons. In 1978, the Ministry of agriculture, animal husbandry and Fisheries introduced a complete set of plastic film mulching technology from Japan through foreign scientific and technological exchanges, including operation methods, special plastic film and mulching machinery. After several years of digestion and absorption, it provides necessary technical, human and material conditions for large-scale popularization and application, and combines with traditional Chinese agricultural farming technology to form a film mulching cultivation technology system with Chinese characteristics. In the aspect of basic theoretical research, through the in-depth study of covering effect and its influence on crop growth, as well as the problems of crop physiology and biochemistry, the theory of "relatively stable effect of covering cultivation environment" is put forward, and the experience of covering cultivation technology in different regions and crops is summarized. In 1979, the special film for floor covering was successfully trial produced, and then a variety of new products such as colored mulch film, reflective film, weeding film, photodegradation film, aging resistant long-life film, incision film were successfully trial produced. In 1983, HDPE and LLDPE ultra-thin mulch films were developed. In 1980, the film mulching machine was successfully trial produced. In 1984, more than 60 types of mulching machines with different power traction were produced. In 1984, the China Film Mulching Cultivation Research Association was established. In 1985, China's film coverage area reached 1.80 × 1010 square meters, ranking first in the world. Film mulching has been successful in more than 80 kinds of crops, and there are more than 40 kinds of mulching crops with practical value and economic benefits.
The food and vegetables of more than one billion people in China are completely self-sufficient, and they can also be exported, without the thin film covering the seedlings, which is one of the reasons for the complete change in the output of China's agriculture and various economic crops.
The mulch film is the polyethylene product of petrochemical industry. China's mulching technology was introduced from Japan in 1978. In the first few years, the project was carried out in 13 provinces and autonomous regions, including Northeast China, Beijing, Shanghai and Inner Mongolia. After production demonstration in 16 provinces and autonomous regions, it was determined to be a scientific technology suitable for promoting the transformation from traditional agriculture to modern agriculture on this land in China. Since 1983, it has been promoted as a national key promotion project to a large area nationwide.
In the past 20 years, the application and development of plastic film is very rapid, and the effect of increasing production and income is particularly significant. In 1979, a small area experiment was carried out mainly on vegetables. In 1983, the mulch area of various crops increased sharply to 629000 hectares. During the 11 years from 1982 to 1992, the area covered by plastic film was 25.067 million hectares. In 1996, the area covered by plastic film was more than 100 million mu, reaching 7 million hectares, of which corn, cotton, rice, peanuts, vegetables, melons and tobacco were 1.761 million hectares, 1.816 million hectares, 605000 hectares, 589000 hectares, 743000 hectares, 600000 hectares and 380000 hectares respectively.
This technology can effectively increase the accumulated temperature, overcome the bad natural conditions such as low temperature and drought, short growth period and so on, and make the late maturing, high-yield and high-quality maize varieties get a good harvest, and the yield is doubled. In the "food and clothing project" implemented in 16 provinces and cities from 1989 to 1991, this technology enabled more than 32 million farmers to surpass From 1993 to 1996, 28.667 million hectares of plastic film mulched maize seedling transplanting and rice seedling throwing cultivation were popularized, including 23.333 million hectares of plastic film mulching. The total output of various agricultural products was over 100 million tons, the output value was 11.4312 billion yuan, and the net income was 97.165 billion yuan. The popularization of mulching technology also promotes the development of chemical industry, light industry, agricultural machinery manufacturing, agricultural material supply and marketing, transportation and other related industries. With the development of plastic film mulching technology to greenhouse vegetables, people can also eat fresh vegetables in cold seasons, improving and improving people's living standards.
Vigorous development of mulching technology