Treatment method for remediation of heavy metal polluted soil by interplanting economic crops and leguminous plants
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A technology of leguminous plants and economic crops, which is applied in the field of soil phytoremediation, can solve the problems of unbalanced soil nutrient consumption and single crop rotation form, and achieve the effects of reduced application, balanced soil nutrients, and high beneficial ingredients
Active Publication Date: 2019-01-15
湖南新九方科技有限公司
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Abstract
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Problems solved by technology
The various repair methods mentioned above use the crop rotation of two kinds of crops with the ability to absorb and enrich the soil to repair the soil. The crop rotation form is relatively simple, and it is easy to cause unbalanced soil nutrient consumption.
Method used
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Embodiment 1
[0024] Example 1: For mild heavy metal cadmium pollution of paddy land.
[0025] 1. Plant oil sunflower according to the conventional method.
[0026] The planting time is in early and mid-May. Before planting, apply organic fertilizer according to the conventional amount, and do a good job in field management, fertilizer and water management, and pest control. In mid-September, the back of the oil sunflower disk turns yellow, the stems turn yellow, and when the middle and upper leaves turn green and turn yellow, they reach physiological maturity and are harvested.
[0027] 2. Interplant soybeans according to conventional methods.
[0028] During the oil sunflower planting period, soybeans were interplanted and sowed at the same time as the oil sunflower. After maturity, the soybean stalks are harvested, and the roots are reserved for plowing into the soil for fertilizer.
[0029] 3. After the oil sunflower is harvested, continue to plow the land, and plant rapeseed accordi...
Embodiment 2
[0040] Example 2: Moderately heavy metal cadmium, lead and arsenic compound polluted dry land.
[0041] 1. Plant corn according to the conventional method first, and interplant soybeans during the period.
[0042] 2. Plant rapeseed according to the conventional method, during which milk vetch is routinely interplanted.
[0043] 3. Plant oil decane according to conventional methods, during which soybeans are routinely interplanted.
[0044] Fourth, plant rapeseed according to the conventional method, during which milk vetch is routinely interplanted.
[0045] 5. Plant sorghum according to conventional methods, and interplant soybeans during the period.
[0046] Sixth, plant rapeseed according to conventional methods, during which milk vetch is routinely interplanted.
[0047] 7. Then plant oil decane according to the conventional method, during which soybeans are routinely interplanted.
[0048] 8. Finally, rapeseed was planted according to conventional methods, during whic...
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Abstract
The invention relates to a treatment method for remediation of heavy metal polluted soil by interplanting economic crops and leguminous plants. According to the method, the planted economic crops include sunflowers, corn, broomcorn and oilseed rape, the economic crops are subjected to crop rotation through a conventional cultivation method according to a sunflower-oilseed rape, corn-oilseed rape and broomcorn-oilseed rape mode, and the leguminous plants are interplanted through a conventional cultivation method during sunflower-oilseed rape, corn-oilseed rape and broomcorn-oilseed rape planting periods. The soil is remediated through crop rotation of various crops and the same kind of crops, and the monotonous mode of an existing crop rotation method in which two crops are subjected to crop rotation is broken through. The crop rotation crops are reasonably matched according to the heavy metal pollution problem of the to-be-restored soil, the aim of remediation of the heavy metal polluted soil can be achieved, and meanwhile soil nutrients can be effectively balanced. Meanwhile, the leguminous plants are interplanted to cooperate with remediation to serve as green manure, and it is guaranteed that the remediated soil is high in beneficial component content. By means of the remediation method, considerable economic benefits can be generated while the plants are planted for soil remediation, and double benefits can be achieved.
Description
technical field [0001] The invention relates to the field of phytoremediation of soil, in particular to a treatment method for interplanting leguminous plants of economic crops to remediate heavy metal polluted soil. Background technique [0002] With the continuous deterioration of the ecological environment, industrial or domestic pollution, the problem of soil environmental pollution caused by metals is becoming more and more serious. As a large agricultural country in my country, the arable land environment plays a decisive role. Cultivated land is used as a breeding base for crops. In order to ensure food security, most of the cultivated land is far away from industrial areas and mining areas, so it generally does not produce heavy metal pollution. However, due to improper control of the discharge of domestic wastewater, waste gas, and waste residues, it will still cause medium and light pollution of cultivated land, especially cadmium pollution is more easily absorbed...
Claims
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Application Information
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