According to the survey, there are about 3.3 million hectares of moderately and heavily polluted cultivated land in China. The annual application of chemical fertilizers exceeds 41 million tons, and the area of ​​sewage irrigation farmland exceeds 3.3 million hectares. The soil is seriously polluted. More seriously, the current soil pollution has spread from industry to agriculture, urban areas to rural areas, surface to underground penetration, and upstream to downstream.
Gao Xiangzhao, chief expert of the National Agricultural Technology Extension Service Center of the Ministry of Agriculture, believes that long-term unreasonable fertilization has led to considerable pressure on the agricultural ecological environment. At the same time, the voice of scientific fertilization in the industry is getting higher and higher. He said that scientific fertilization is not only related to the change in the amount of fertilization, but also related to fertilizer content, form and fertilization. Ecological fertilizer can effectively alleviate the environmental pressure caused by fertilization.
Shang Zhaocong, director of the National Fertilizer Quality Supervision and Inspection Center (Shanghai), said that according to the classification principle, the fertilizer can be divided into ecological grade, farmland grade and garden grade. Among them, ecological grade fertilizer refers to a kind of nutrient that can provide one or more essential nutrients for plants, improve soil traits, improve soil fertility, not bring negative effects to ecosystems, maintain stable and stable agricultural production and ecological safety. fertilizer. In the current environment, ecological grade fertilizers are receiving more and more attention and are well received by the market.
As a kind of ecological fertilizer, microbial fertilizer has ushered in new development opportunities. Li Jun, director of the Microbial Fertilizer Quality Inspection Center of the Ministry of Agriculture, believes that microbial fertilizers are environmentally friendly ecological fertilizers, with the function of “four or two poundsâ€, and have been sustained, rapid and stable development in the past 10 years.
It is divided into three categories: agricultural microbial agents, bio-organic fertilizers, and compound microbial fertilizers. Microbial fertilizers can provide or activate nutrient functions, produce a variety of active substances, carry out soil improvement and repair, promote the maturity of organic materials, improve the quality of agricultural products, and enhance crop resistance.
Liu Jianming, director of the Institute of Geology and Geophysics of the Chinese Academy of Sciences, said that soil has three basic functions: nutrient function, structural function and environmental function. All soil remediation and improvement are carried out around these three functions.
Analysis of the soil structure shows that minerals, organic matter, and biomass are important components of the soil, while mineral elements are the only nutrients for all green plants. He believes that mineral-organic-microbial ternary ecological compound fertilizer is a technical solution to achieve soil remediation improvement and ecological agriculture.
This article URL: Ecological fertilizer can effectively alleviate the pressure on environmental protection caused by fertilization
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