Construction method for nitrogen and phosphorus loss system of greenhouse soil of intercept river network area

Abstract

The invention relates to a construction method for a nitrogen and phosphorus loss system of greenhouse soil of an intercept river network area, which comprises the following steps that: an ecological canal is constructed on the earth surface of greenhouse soil, the ecological canal is formed by splicing pipes with U-shaped cross sections, the bottoms of the U-shaped pipes are poured with concrete, a side wall joint between every two U-shaped pipes is provided with a gap, and plants are planted in the gap; the bottom of the ecological canal is provided with a growth box, a growth medium is arranged in the growth box, plants are planted in the growth box, and the growth medium is coal cinder, detritus or ceramsite; the ecological canal is communicated with a water collecting tank, the water collecting tank is connected with a wetland rice field, two ends of the wetland rice field are provided with buffer zones, rice is planted in the middle zone between the buffer zones, and stored water flowing out from the water collecting tank flows into the wetland rice field through the buffer zone, and then flows out from the buffer zone at the other end of the wetland rice field. According to the invention, the load of nitrogen, phosphorus nutrient and other nutrient substances can be effectively reduced, the runoff load of the greenhouse soil is effectively reduced, and the problem of eutrophication of river network water near the greenhouse soil can be solved.

Description

[0001] technical field

[0002] The technology of the present invention belongs to the technical field of water supply and drainage of facility vegetable fields. It can carry out ecological ditch interception treatment for the runoff pollution of facility vegetable fields, and at the same time use the wetland paddy field system to absorb and reuse the surplus nutrients in the vegetable field drainage that has been intercepted by ecological ditch. In particular, it has a strong reduction effect on pollutants such as nitrogen and phosphorus.

[0003] Background technique

[0004] Non-point source (also known as non-point source) pollution is a serious environmental problem that exists in the world today. Studies in developed countries such as the United States and the European Union have shown that agricultural activities are the largest source of non-point source pollution. In 1985, the United States conducted the most extensive survey of non-point source pollution so far. T...

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