Agricultural Pest Control on Rural Water Pollution and Countermeasures
Water pollution prevention and control is a work that affects social development and people's interests. At present, chemical control is still the most commonly used, economical, effective and convenient control method in rural areas. That is to use pesticides to control diseases, insects, grass, mice and other agricultural pests. Pesticides are indispensable means of production in agricultural production, has made the huge contribution to the agricultural production, but simultaneously has caused the harm to the ecological environment. The effects of agricultural pollutants on water environment are considered in this paper. First of all, the amount of agricultural pollutants (COD, TN and TP) entering the river was calculated, and the spatial difference of agricultural pollutants was analyzed. Second, the pollution indexes of agricultural organic pollutants (COD) and total nitrogen (TN) were calculated by using the pollution model, and the spatial difference of pollution was analyzed. In the end, a model of agricultural pollution pressure was established to quantitatively evaluate the impact of agricultural pollutant discharge on water environment. According to this study, the variation of fluctuation asymmetry is not only related to the pollution degree of agricultural non-point source, but also to the anti-pollution degree of indicator organism. Biological control with the same genetic background has the least asymmetric change in the optimal environment for rural water pollution.