A method for soil pollution remediation and soil fertilization based on powder ridge farming

Abstract

A method for soil pollution remediation and soil fertilization based on powder ridge farming. The steps are: (1) Dig deep trenches around the cultivated land to form a drainage system to meet the requirements of drainage and irrigation; (2) Fen ridge farming on cultivated land, the first time The depth of the Fenlong cultivation is more than 40 cm in the dry land, and the depth of the paddy field is above 25 cm. After each Fenlong cultivation, green manure is sown, and the Fenlong cultivation is carried out every 2-3 months combined with the green manure returning to the field; (3) Each Fenlong cultivation Afterwards, depending on the climatic conditions such as the rainy season, alternate dry and wet water management is carried out to allow the residual heavy metals and pesticides and other harmful substances in the soil to move down from the upper layer of the cultivation layer to the bottom layer, and use the rain in the rainy season to store water in the field. The drainage system is quickly discharged to the outside; (4) Fenlong and green manure planting, alternate 2-3 times within a year, and crops can be planted after the second year. The method uses powder ridge farming to realize low-cost soil pollution remediation and soil fertilization.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for quickly loosening and discharging soil based on powder ridge farming for soil pollution remediation and soil fertilization. Background technique [0002] With the continuous development of my country's industry and urbanization, the problem of soil heavy metal pollution caused by industrial and domestic wastewater discharge, sewage irrigation and excessive use of chemical fertilizers and pesticides has become increasingly serious. Sources of soil heavy metal pollution include metal mining and smelting, chemical industry production, heavy metal pesticides, sewage irrigation and chemical fertilizer application, and high geological background values. The dissolution and diffusion of solid waste into the soil is the main way of heavy metal pollution. According to Luo Xiwen, an academician of the Chinese Academy of Engineering, about 300 million mu of arable lan...

AI Technical Summary

Problems solved by technology

The excessive use of chemical fertilizers and pesticides makes the soil rich in salinity, and the number and amount of microbial communities in the soil are greatly reduced, resulting in poor soil permeability, soil compaction, reduced colloids, difficult cultivation, and greatly reduced fertilizer retention capacity. The acid-base response of the soil is out of balance

2. The phenomenon of shallow soil cultivation is intensified, the oxidation-reduction potential decreases, and the toxic substances increase

Soil or secondary gleization, with green interlayer and poor permeability; or low maturity, poor fertility and lack of nutrition

4. Mineral Toxic Pollution Hazards

"However, planting plants that do not enter the food chain is the most feasible, but it does not match the modern farming model that maximizes economic benefits, and it is difficult to achieve in a short period of time; the cost of adding organic fertilizers and soil conditioners that passivate heavy metals is high and requires The continuous use of crops in each season will have better results, which is not enough for the current development of China's agriculture to meet this demand

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