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...

Examples

Embodiment 1

[0032] The following steps can be used to complete soil pollution remediation and soil fertilization based on powder ridge farming:

[0033] (1) Dig deep ditches around cultivated land polluted by chemical fertilizers, pesticides and or heavy metals to form a drainage system to meet the requirements of drainage and irrigation; The dry land is more than 40 cm, and the depth of the paddy field is more than 25 cm. After each plowing, green manure is sown, and the green manure is returned to the field for the second time after 2-3 months, and then the third time is 2-3 months apart. (3) After each Fenlong cultivation, according to the rainy season and other climate conditions, alternate dry and wet water management, so that the residual heavy metals and pesticides and other harmful substances in the soil can move down from the upper layer of the cultivated layer To the bottom layer, use the rain in the rainy season to store water in the field, and quickly discharge it through the ...

Embodiment 2

[0035] The following steps can be used to complete soil pollution remediation and soil fertilization based on powder ridge farming:

[0036] (1) Dig deep ditches around cultivated land polluted by chemical fertilizers, pesticides and or heavy metals to form a drainage system to meet the requirements of drainage and irrigation; The dry land is more than 40 cm, and the depth of the paddy field is more than 25 cm. After each plowing, green manure is sown, and the green manure is returned to the field for the second time after 2-3 months, and then the third time is 2-3 months apart. (3) After each Fenlong cultivation, according to the rainy season and other climate conditions, alternate dry and wet water management, so that the residual heavy metals and pesticides and other harmful substances in the soil can move down from the upper layer of the cultivated layer To the bottom layer, use the rain in the rainy season to store water in the field, and quickly discharge it through the ...

Embodiment 3

[0040] The following steps can be used to complete soil pollution remediation and soil fertilization based on powder ridge farming:

[0041] (1) Dig deep ditches around cultivated land polluted by chemical fertilizers, pesticides and or heavy metals to form a drainage system to meet the requirements of drainage and irrigation; The dry land is more than 40 cm, and the depth of the paddy field is more than 25 cm. After each plowing, green manure is sown, and the green manure is returned to the field for the second time after 2-3 months, and then the third time is 2-3 months apart. (3) After each Fenlong cultivation, according to the rainy season and other climate conditions, alternate dry and wet water management, so that the residual heavy metals and pesticides and other harmful substances in the soil can move down from the upper layer of the cultivated layer To the bottom layer, use the rain in the rainy season to store water in the field, and quickly discharge it through the ...

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...

Examples

Embodiment 1

[0032] The following steps can be used to complete soil pollution remediation and soil fertilization based on powder ridge farming:

[0033] (1) Dig deep ditches around cultivated land polluted by chemical fertilizers, pesticides and or heavy metals to form a drainage system to meet the requirements of drainage and irrigation; The dry land is more than 40 cm, and the depth of the paddy field is more than 25 cm. After each plowing, green manure is sown, and the green manure is returned to the field for the second time after 2-3 months, and then the third time is 2-3 months apart. (3) After each Fenlong cultivation, according to the rainy season and other climate conditions, alternate dry and wet water management, so that the residual heavy metals and pesticides and other harmful substances in the soil can move down from the upper layer of the cultivated layer To the bottom layer, use the rain in the rainy season to store water in the field, and quickly discharge it through the ...

Embodiment 2

[0035] The following steps can be used to complete soil pollution remediation and soil fertilization based on powder ridge farming:

[0036] (1) Dig deep ditches around cultivated land polluted by chemical fertilizers, pesticides and or heavy metals to form a drainage system to meet the requirements of drainage and irrigation; The dry land is more than 40 cm, and the depth of the paddy field is more than 25 cm. After each plowing, green manure is sown, and the green manure is returned to the field for the second time after 2-3 months, and then the third time is 2-3 months apart. (3) After each Fenlong cultivation, according to the rainy season and other climate conditions, alternate dry and wet water management, so that the residual heavy metals and pesticides and other harmful substances in the soil can move down from the upper layer of the cultivated layer To the bottom layer, use the rain in the rainy season to store water in the field, and quickly discharge it through the ...

Embodiment 3

[0040] The following steps can be used to complete soil pollution remediation and soil fertilization based on powder ridge farming:

[0041] (1) Dig deep ditches around cultivated land polluted by chemical fertilizers, pesticides and or heavy metals to form a drainage system to meet the requirements of drainage and irrigation; The dry land is more than 40 cm, and the depth of the paddy field is more than 25 cm. After each plowing, green manure is sown, and the green manure is returned to the field for the second time after 2-3 months, and then the third time is 2-3 months apart. (3) After each Fenlong cultivation, according to the rainy season and other climate conditions, alternate dry and wet water management, so that the residual heavy metals and pesticides and other harmful substances in the soil can move down from the upper layer of the cultivated layer To the bottom layer, use the rain in the rainy season to store water in the field, and quickly discharge it through the ...

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