The improvement of water environment is unbalanceduncoordinated, so as to solve the problem of pollution

On April 22, the Ministry of ecology and environment announced the national surface water environmental quality from January to March this year. From January to March, among 3641 national surface water assessment sections, the proportion of sections with excellent water quality (class I-III) was 88.2%, an increase of 5.2 percentage points year-on-year; The proportion of sections inferior to class V was 1.0%, a year-on-year decrease of 1.1 percentage points.

On the whole, the quality of water environment is improving. From the perspective of the plots with poor water environment in China, some unbalanced and uncoordinated problems have emerged. The Ministry of ecology and environment said that the water quality of some sections rebounded, the elimination of inferior class V in some areas lagged behind, and the problems such as "hiding dirt and accepting dirt" in the dry season and "zero deposit and lump sum withdrawal" in the rainy season were prominent... The Ministry of ecology and environment further analyzed and believed that urban and rural non-point source pollution was rising as the main contradiction restricting the continuous improvement of the water environment.

With the gradual deepening of environmental protection industry in rural areas, agricultural non-point source pollution has become the topic center of non-point source pollution. A few years ago, when explaining the situation of agricultural non-point source pollution in China, the Vice Minister of agriculture frankly said that China's agricultural non-point source pollution was generally not optimistic. Since then, the key battle of agricultural non-point source pollution prevention and control has stepped into the speed-up stage. Recently, agricultural non-point source pollution prevention and control technologies and measures have emerged, and strive to solve the environmental problem of agricultural non-point source pollution as soon as possible.

For example, in order to reduce the pollution caused by plastic film mulching to the soil environment, the Agricultural Department of Fuding City, Fujian Province launched the experimental planting of potato full biodegradable film for the first time, which has generated carbon dioxide and water river humus, greatly reducing the impact on the environment. For another example, the synchronous side deep fertilization technology of mechanized rice transplanting vigorously promoted in Zhuhai City, Guangdong Province not only realizes the overall, high-quality and efficient development of agricultural mechanization, but also provides feasible experience for the treatment of agricultural non-point source pollution.

The problem of agricultural non-point source pollution will directly affect the water quality, which has a wide range and high difficulty. At present, the experience formed is not rich enough, and the problem of non-point source pollution still needs to be solved for a long time to stabilize the deep force. Facing agricultural non-point source pollution directly, some people in the industry have studied and put forward the "quasi point source treatment" scheme of agricultural non-point source pollution. It believes that the main difference between non-point source pollution and point source pollution is information acquisition. If the polluters and emissions can be accurately identified, the pertinence of non-point source pollution control will be improved. Therefore, the "quasi point source treatment" model proposed by it is actually to improve the level of non-point source pollution monitoring and treatment by strengthening the supervision of fertilization and drug use behavior of decentralized agricultural production and management entities in China.

Last year, the implementation plan for the treatment, supervision and guidance of agricultural non-point source pollution (Trial) jointly issued by the Ministry of ecological environment and the Ministry of agriculture and rural areas has made it clear that agricultural non-point source pollution in key areas should be preliminarily controlled by 2025. Source prevention and control, monitoring level, regulatory capacity and other aspects are the focus of improvement. There is a long way to go for the prevention and control of non-point source pollution. At present, there are various measures for the prevention and control of non-point source pollution in China, but a set of universal prevention and control scheme has not yet been formed. With the strengthening of environmental protection, it is time to form a system for the prevention and control of non-point source pollution!