Method for reducing slope cropland non-point source pollution by biochar-improved ecological ridge

A non-point source pollution and bio-carbon technology, which is applied in the direction of site preparation, construction, soil drainage, etc., can solve the problems of insufficient utilization and improvement of bio-carbon, reduce the risk of secondary pollution, reduce costs, and solve geographical restrictions Effect
CN104094692AActive Publication Date: 2014-10-15BEIJING NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING NORMAL UNIVERSITY
Publication Date
2014-10-15

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Abstract

The invention provides a method for reducing slope cropland non-point source pollution by a biochar-improved ecological ridge, and relates to building of a telescoping ecological ridge based on ADP(NH4H2PO4) modified biochar. A layout method provided by the invention comprises the steps: firstly establishing ridges at a preset interval in a direction vertical to the slope surface of a slope cropland, wherein each ridge is formed by piling up soil mixed with biochar with a preset proportion and forms a buffer strip; forming drain holes with a preset number in each buffer strip, digging a deep pit at the rear end of each drain hole, and arranging a telescoping purification device in each deep pit, wherein each telescoping purification device is formed by combining three layers, i.e., stone strips, biochar strips and clay strips and forms a filter strip; establishing a drainage channel at the rear end of the last filter strip close to the base of a slope and connecting with a riverway, so as to form a complete ecological ridge layout. By adopting the method, the nutrient substance and water utilization efficiency of the existing slope cropland can be improved, and the problems that due to surface runoff and underflow, silt flows down and migrates, and pollution by heavy metal and organic pollutants occurs can be effectively prevented.
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Description

【Technical field】

[0001] The invention relates to an improved ecological ridge layout method of sloping cultivated land. In particular, the invention relates to a method for improving ecological field ridges by using biological carbon to reduce pollution from slope farming ground sources, and belongs to the technical field of agricultural environmental protection. 【Background technique】

[0002] China is a large agricultural country, and the problem of non-point source pollution caused by agricultural activities is becoming more and more serious. In particular, the massive application of chemical fertilizers and pesticides enters the environment and ecosystem through processes such as migration, transformation, adsorption, and degradation, which inevitably cause environmental pollution problems, including pollution to animals, plants, microorganisms, and soil and water bodies. Most of the cultivated land in my country is sloping farmland with a certain slope, and there is a...

Claims

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