The harm and key points of prevention and control of agricultural non-point source pollution to aquatic ecosystems

Agricultural non-point source pollution refers to the phenomenon of pollutants entering water bodies due to the extensive use of fertilizers, pesticides, animal and poultry manure, or improper management during the process of agricultural production, causing water pollution. The harm of agricultural non-point source pollution to aquatic ecosystems is mainly manifested in water quality deterioration, reduction in biodiversity, and impairment of ecosystem service functions, therefore, preventing and controlling the damage of agricultural non-point source pollution to aquatic ecosystems is of great significance.

I. The harm of agricultural non-point source pollution to aquatic ecosystems

Water quality deterioration: Excessive nutrients such as nitrogen and phosphorus from agricultural non-point source pollution enter water bodies, causing eutrophication, reducing water transparency, excessive algal proliferation, and deteriorating water quality, affecting the survival of aquatic organisms.

Reduction in biodiversity: Agricultural non-point source pollution leads to eutrophication of water bodies, aquatic organisms cannot grow normally, biodiversity of aquatic organisms decreases, and even leads to the death of aquatic organisms, affecting the stability and diversity of aquatic ecosystems.

Damage to ecosystem service functions: Agricultural non-point source pollution disrupts the balance of aquatic ecosystem services, affects the purification, regulation, supply, support, and cultural service functions of aquatic ecosystems, leading to the impairment of the functions of aquatic ecosystems.

II. Key points of prevention and control of agricultural non-point source pollution

Enhancing the awareness of prevention and control of agricultural non-point source pollution: The government should strengthen the publicity and education on agricultural non-point source pollution, improve farmers' environmental awareness, and encourage farmers to adopt ecological agriculture, precision fertilization, and precision medication, etc., to reduce agricultural non-point source pollution.

Promoting ecological agriculture: Promote ecological agriculture, such as ecological planting, ecological breeding, and integrated ecological farming, reduce the use of fertilizers and pesticides, improve the utilization efficiency of agricultural resources, and reduce agricultural non-point source pollution.

Strengthening the monitoring and early warning of agricultural non-point source pollution: Establish an agricultural non-point source pollution monitoring network, real-time monitoring the status of agricultural non-point source pollution, and timely early warning of the occurrence of agricultural non-point source pollution, providing scientific basis for the prevention and control of agricultural non-point source pollution.

Strengthening the control of agricultural non-point source pollution: Use physical, chemical, and biological methods to control agricultural non-point source pollution, such as using ecological interception, ecological restoration, and ecological purification technologies, to reduce the impact of agricultural non-point source pollution on aquatic ecosystems.

Policy support for strengthening agricultural non-point source pollution: The government should formulate relevant policies to encourage farmers to adopt environmental protection technologies, reduce agricultural non-point source pollution, and at the same time provide subsidies to farmers to alleviate their economic burden.

The harm of agricultural non-point source pollution to aquatic ecosystems is profound, therefore, effective measures must be taken to prevent and control it, protect aquatic ecosystems, and ensure ecological safety.