Ecological field ridge for reducing lateral seepage of rice field diffused pollution

Abstract

The invention relates to an ecological field ridge for reducing lateral seepage of rice field diffused pollution. The ecological field ridge aims at solving the problem that the existing field ridge cannot improve utilization efficiency of a rice field and effectively prevent water and nutrition loss caused by the lateral seepage simultaneously. The arrangement way of the ecological field ridge is that a rectangular or an inverted trapezoidal ditch with depth of 70cm-100cm, bottom width of 40cm-80cm and top width of 50cm-100cm is dug at the position 5cm-10cm far away from the rice field, the ditch is divided into three filtering belts through bamboo poles and straw mats, a gravel belt is positioned close to the rice field, a biochar belt is positioned in the middle, and a clay belt is positioned close a trench. By means of the ecological field ridge, utilizing efficiency of the field ridge is increased, the lateral seepage water yield is reduced by 50%-90%, and diffused pollutant nitrogen and phosphorus are decreased by 70%-100%. The ecological field ridge is suitable for lateral seepage rice soil in northeast China regions.

Description

technical field [0001] The invention relates to an ecological field ridge. Background technique [0002] With the improvement of point source pollution control technology in my country, non-point source pollution has become an important factor affecting the water environment, especially with the increase in agricultural investment, excessive use of chemical fertilizers and pesticides has exacerbated the ecological risk of non-point source pollutants. The first national survey of pollution sources showed that chemical oxygen demand, total nitrogen, and total phosphorus emitted from agricultural sources accounted for 43.7%, 57.2%, and 67.3% of the total emissions, respectively. Paddy fields are in a state of flooding for a long time except during the sun-drying period. Therefore, lateral infiltration is an important way of nitrogen output from paddy fields. In the Taihu Lake Basin, the area of ​​lateral seepage paddy soil accounts for 13.3%. The study of "Export Mechanism an...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing field ridges cannot simultaneously improve the utilization efficiency of paddy fields and effectively prevent the loss of water and nutrients caused by side seepage, and provide an ecological field ridge that reduces side seepage of rice field non-point source pollution.

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