Method for intercepting agricultural non-point source pollution ecological ditch by utilizing waste aquaculture pond

Abstract

The invention provides a method for intercepting an agricultural non-point source pollution ecological ditch by utilizing a waste aquaculture pond. The shape of the ditch in an agricultural planting field is changed, the homocentric-square-shaped ditch is formed in the outermost periphery of the agricultural planting field, and multiple buffer mounds are arranged in the homocentric-square-shaped ditch, so that the phosphorus and nitrogen loss amount in the planting field can be effectively reduced from the source. A rainstorm accumulation pool, a daily accumulation pool, a heavy metal sedimentation pool, a multi-stage purification pool, a hydroponic plant planting pool and a benthic organism pool are divided and arranged in the waste aquaculture pond, and existing resources can be used forachieving the multi-purification of the agricultural non-point source pollution ecological ditch. Various aquatic vegetables with different phosphorus and nitrogen demands are respectively planted inthe hydroponic plant planting pool according to the phosphorus and nitrogen demand of the aquatic vegetables, and the aquatic vegetables are re-planted by utilizing the phosphorus and nitrogen lost in the agricultural planting field, so that the lost resources in the farmland can be effectively utilized, and the agricultural income is increased.

Description

technical field [0001] The invention relates to a method for intercepting agricultural non-point source pollution ecological ditches by using abandoned aquaculture ponds, and belongs to the technical field of environmental protection. Background technique [0002] Nitrogen and phosphorus are the fundamental elements of agricultural development, and also the main factors causing eutrophication of rivers. Although the excessive input of nitrogen and phosphorus fertilizers in farmland is currently reduced, due to the hardening of ditches in the field or the interception functions of farmland buffer zones and ecological ditches, etc. In the absence of nitrogen and phosphorus in farmland, there is still the loss of nitrogen and phosphorus in farmland, and the outflow of nitrogen and phosphorus is discharged into the surface water system, thereby aggravating the process of eutrophication pollution in rivers, lakes and reservoirs, and even groundwater. [0003] In order to meet the...

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Problems solved by technology

[0002] Nitrogen and phosphorus are the fundamental elements of agricultural development and also the main factors causing eutrophication in rivers. Although the excessive input of nitrogen and phosphorus fertilizers in farmland is currently reduced, due to the hardening of ditches in the field or the interception function of farmland buffer zones and ecological ditches, etc. If there is a shortage of nitrogen and phosphorus in farmland, there is still a loss of nitrogen and phosphorus in farmland, and the outflow of nitrogen and phosphorus is discharged into the surface water system, thereby aggravating the process of eutrophication pollution in rivers, lakes and reservoirs, and even groundwater.

[0003] In order to meet the current environmental protection requirements and maintain the water quality of rivers and lakes, policies have been issued all over the country to prohibit aquaculture around the rivers. As a result, many abandoned breeding ponds around the rivers have not been fully reused, resulting in a waste of resources.

[0004] At present, the method of intercepting agricultural non-point source pollution ecological ditches still has the defects of high basic investment and construction cost, inability to be popularized and applied on a large scale, and weak results. How to use the existing abandoned aquaculture ponds to intercept agricultural non-point source pollution ecological ditches, to achieve The reuse of existing resources and the ability to improve the treatment effect of agricultural non-point source pollution ecological ditches at the same time have very important development prospects

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