Method for solving agricultural non-point source pollution

Abstract

The invention discloses a method for solving agricultural non-point source pollution, which belongs to the field of agricultural ecology and environmental protection, and comprises the following steps: constructing a denitrification ditch along the vertical direction of the water flowing direction between ridges, backfilling the denitrification ditch with filler until the filler is 0.2-0.3 m away from the ground, and filling soil until the ditch is flush with the land; planting a flower and grass belt at the runoff water outlet end of the field side; constructing an ecological ditch between the riverway around the farmland and the riverway outside the farmland area; constructing an ecological interception dam at a water outlet of the ecological ditch, and constructing a drainage check gate on the ecological interception dam; planting emergent aquatic plants at the ditch bottom of the ecological ditch, and constructing plant zones on the ditch wall and the ditch side embankment; the original drainage ditch is fully utilized, the farmland drainage ditch is subjected to certain engineering transformation, and an ecological interception type ditch system is built, so that the ecological interception type ditch system has the original drainage function, and the ecological functions of adsorption, absorption, degradation and the like of nutrients such as nitrogen and phosphorus carried in farmland drainage are added.

Description

technical field [0001] The invention relates to the fields of agricultural ecology and environmental protection, in particular to a method for solving agricultural non-point source pollution. Background technique [0002] Farmland non-point source pollution refers to the environment formed by the surface runoff and seepage of farmland through the surface runoff and farmland seepage of nutrients such as nitrogen and phosphorus, pesticides, and other organic or inorganic pollutants during farmland production activities. pollute. Agricultural non-point source pollution is an important factor affecting the environment, which restricts the sustainable development of agriculture and rural economy in my country. The main reason for this is the unreasonable application and use of chemical fertilizers and pesticides, and a large amount of residual nitrogen and phosphorus enter the water body, resulting in eutrophication of algae The problem of globalization is prominent and the harm ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for solving agricultural non-point source pollution, in order to solve the problems existing in the above-mentioned prior art, the method forms a vegetable field drainage ecological interception and water purification system through the internal reduction and external resistance control of the farmland, and promotes the dissolution N and P absorption in the state, realize the function of double retention of runoff and sediment in the small vegetation buffer zone, interception and purification of nitrogen and phosphorus pollutants

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