What is the effect of applying organic fertilizer on food safety?

What is the effect of applying organic fertilizer on food safety? Please introduce the current quality and safety of agricultural products in China, which has attracted more and more attention from the society. The factors that lead to the safety of agricultural products, especially the quality safety, include both natural and man-made aspects, in which the pollution of ecological environment, that is, water, soil, air and hygiene, is an important source leading to the decline of the quality of agricultural products. From the input of the means of production, that is, the source of chemical fertilizers and pesticides, preventing pollutants from entering the soil and improving the soil ecological environment is essential to ensure the safety of agricultural products. The main problems of agricultural product safety and soil pollution at present, the soil pollution that our country faces mainly has the following aspects: first, excessive and unscientific application of chemical fertilizer will cause soil pollution. In recent years, the average amount of chemical fertilizer applied to cultivated land in China is more than 220 kg/hm2. In the 1990s, the average application rate of 17 provinces exceeded the internationally recognized upper limit of 225kg/hm2, of which 4 provinces reached 400kg/hm2. The contents of nitrate and nitrite nitrogen in drinking water and agricultural products in some areas obviously exceeded the standard. In 2001, agricultural exports of individual provinces in the Yangtze River Delta lost hundreds of millions of dollars due to unqualified monitoring. Secondly, the total amount of pesticides used in China has reached more than 1.3 million tons (proprietary medicines), which is twice as high as that of developed countries. Especially with the reform of planting structure, the sown area of vegetables, melons and fruits increased greatly, which was 1-2 times higher than that of grain crops. The residue of pesticide in soil after application is 50%-60%. At present, the detectable rate of BHC and DDT in soil which has been discontinued for a long time is still very high. Third, heavy metal pollution is becoming more and more serious. According to relevant statistics, the soil area polluted by heavy metals in China has reached 20 million hm2, accounting for 1 hm2 of the total arable land. Due to nearly 7 million kg of farmland polluted by industrial "three wastes", grain production has been reduced by 10 billion kg per year. Fourth, solid wastes such as plastics, solid domestic waste and dry organic fertilizers can become solid wastes in agro-ecosystem if they are not properly disposed of. At present, the most harmful thing is waste plastic. The importance of organic fertilizer to food safety and agricultural sustainable development China has a large population and little land, and the per capita area of cultivated land is only 1.5mu (1.95 billion mu), which is less than half of the world average. The soil nutrients of cultivated land in China are poor. Except for the black soil in the northeast and the old vegetable gardens in various places, the organic matter in dryland soil is mostly 1.0%-1.5%, and the soil organic matter in paddy field is 1.5%-2.0%. Most of the soil available N, P, K are in the middle and lower levels. Therefore, China's agriculture will face greater challenges in the 21st century. How to make good use of organic and inorganic fertilizer resources, how to deal with the relationship between fertilization and benefit, between fertilization and ecological environment, and between fertilization and the safety of agricultural products? it is a major issue related to the national economy and people's livelihood. As a new type of environmental protection fertilizer, one of the most prominent characteristics of organic fertilizer is to improve crop quality, improve soil fertility and purify the environment. The content of soil organic matter is closely related to the level of fertility and supply capacity, such as very low fertility of sandy alkali land, desert and other barren land, it is difficult to maintain crop growth and increase production with a large amount of chemical fertilizer. Therefore, the enhancement of organic fertilizers is also a necessary measure to continue to increase crop production. The implementation of the "fertile soil Project" and the "pollution-free Action Plan" of the Ministry of Agriculture is bound to speed up the development and production of organic fertilizers, in which the demand for pollution-free fertilizers for grade A green food will be even greater. Subsequently, the agricultural means of production required for AA green food also increased again, especially the Ministry of Agriculture, the Environmental Protection Bureau and relevant departments, as well as local governments at all levels, actively supported and promoted the development and production of organic fertilizers, and formulated a series of policies and management measures. The No. 1 document of the Central Committee in 2008 emphasizes that we should speed up the implementation of fertile soil projects and expand the scale of soil testing and formula fertilization. Support farmers to return straw to the field, plant green manure and increase the application of organic fertilizer. To actively develop green food and organic food, cultivate famous agricultural products, support the production of high-quality agricultural products and the development of characteristic agriculture, we should reduce costs and increase income, vigorously develop conservation-oriented agriculture, and promote the resource utilization of straw and other by-products and domestic wastes, so as to improve the efficiency of agricultural production. The Premier of the State Council presided over an executive meeting of the State Council on May 28, 2008, which gave important instructions on China's agricultural material supply, especially the development of organic fertilizer industry: rectify and standardize the order of chemical fertilizer market, strengthen price and quality supervision; popularize the technology of soil testing and formula fertilization, guide farmers to apply fertilizer reasonably, and encourage more organic fertilizer. The Ministry of Finance and the State Administration of Taxation issued the notice on exemption of value-added tax for organic fertilizer products, which will be exempted from value-added tax for taxpayers' production and retail of organic fertilizer products from June 1. The introduction of new national policies and management methods shows that the state pays more and more attention to the organic fertilizer industry, and provides a better development platform for the development of the organic fertilizer industry through policy support, which lays a good foundation for the healthy development of organic fertilizer. under this background, the development prospect of organic fertilizer is very broad. Click to get more organic fertilizer application technology click to get more fertilizer application technology