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

A technology for constructing methods and facilities, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as runoff pollution of facilities and vegetable fields in water network areas, and facilitate large-scale promotion Effects of application, load reduction, and high survival rate

Inactive Publication Date: 2012-07-25
INST OF SOIL SCI CHINESE ACAD OF SCI
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Problems solved by technology

[0007]Technical problem to be solved: the purpose of this invention is to provide a construction method for intercepting the loss of nitrogen and phosphorus in water network area facilities and vegetable fields, which mainly solves the problem of water network area Runoff Pollution from Vegetable Fields in Facilities

Method used

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

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Embodiment 1

[0028] The Taihu Lake Basin covers an area of ​​36,900 square kilometers, mainly plains, accounting for 4 / 6 of the total area, 1 / 6 of the water surface, and the rest are hills and mountains. The project demonstration area is located in Binhu District, Wuxi City. With the adjustment of the agricultural structure, facility cultivation, especially greenhouse vegetable cultivation area continues to expand, and greenhouse vegetable production has become one of the important components of local agricultural production. For the Taihu Lake area, most of the protected vegetables are replanted from rice fields, and the coexistence of rice fields and vegetable fields in the same area is common. The Taihu Lake area is densely covered with river networks, and many facility vegetable fields are adjacent to water bodies. Fertilizers can easily enter the water bodies through runoff under the erosion of rainwater. Therefore, nitrogen and phosphorus runoff from vegetable fields is an important ...

Embodiment 2

[0040]The construction method of intercepting the nitrogen and phosphorus loss system of the facility vegetable field in the water network area: introduce the runoff of the facility vegetable field into the ecological ditch, absorb the nitrogen and phosphorus in the runoff through the ecological ditch, reduce the water speed, and settle the sediment; the cross section of the ditch is U-shaped , The ditch is composed of a plurality of U-shaped cement pipes arranged in length × width × height = 40 × 50 × 60 (cm), and the bottom of the middle junction of every two U-shaped pipes is connected by cement pouring, and the side wall is left with a 30cm wide soil At the bottom of the ditch, a growth box filled with adsorption materials with strong adsorption capacity for nitrogen and phosphorus is placed at a distance of 80 cm. Bermudagrass and nitrogen-efficient rice Guidan No. 4; the treated vegetable field drainage is intercepted by the ecological ditch and then poured into the sump,...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 施卫明陆扣萍闵炬杨林章
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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