Method for repairing cadmium-contaminated soil by sedum alfredii hance, soil dressing method and low-absorption corn

A technology of cadmium-contaminated soil and guest-soil method, which is applied in the field of soil-contaminated phytoremediation, can solve the problems of remediation cost and economic loss increase, easy rotten roots, low reproduction coefficient, etc., to improve survival rate and remediation efficiency, easy to accept, The effect of rich planting experience

Inactive Publication Date: 2020-02-04
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology

However, in the high temperature environment of Guangdong in summer, the roots of Sedum sedum are easy to rot and even die, and the reproduction coefficient is low. Therefore, high temperature and high humidity are the key limiting factors for the growth of Sedum sedum (Zhi Zhongzhen, He Lihong, Yu Tuyuan, et al. Research on propagation of stem cuttings and leaf cuttings[J]. Northern Horticulture, 2011(22):64-67.), which reduces its ability...

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  • Method for repairing cadmium-contaminated soil by sedum alfredii hance, soil dressing method and low-absorption corn
  • Method for repairing cadmium-contaminated soil by sedum alfredii hance, soil dressing method and low-absorption corn

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Embodiment Construction

[0025] The method for remediating cadmium-contaminated soil by utilizing Sedum sedum, guest soil method and low absorption corn comprises the following steps:

[0026] (1) In the cadmium-contaminated farmland in eastern Guangdong where the total amount of cadmium is 0.9-1.5 mg / kg, divide it into two farmlands A and B according to the area ratio of 10:1, and build a ridge between the two fields. The width of the field ridge is 0.4m, the height is 0.3m, and the two sides of the field ridge are separated by impervious membranes, and the depth is 0.5m to avoid water passing between two fields.

[0027] A farmland is repaired by planting crops, and B farmland is used to stack the root soil of plants.

[0028] (2) In September, plant Sedum sedum seedlings grown in soil with a cadmium content of less than 0.3 mg / kg at the regular planting density in September, and remove the part of Sedum sedum above 5 cm above the ground for harmless treatment every other month. After the Sedum...

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Abstract

The invention relates to a method for repairing cadmium-contaminated soil by sedum alfredii hance, a soil dressing method and low-absorption corn, wherein the method comprises the following steps: (1)a cadmium-contaminated farmland in the eastern Guangdong region with the total cadmium content of 0.9-1.5 mg/kg is divided into a farmland A and a farmland B, and constructing a ridge between the twofarmlands; (2), sedum alfredii hance is planted in the farmland A in September, after the sedum alfredii hance grows for six months, earth surface plants are removed, innocent treatment is carried out, and then soil at roots of the sedum alfredii hance plants is dug out and placed in the farmland B; (3) in March of the next year, Jingzhongyu corn seeds are directly sown in the soil in the farmland A, and the soil covers and tread down after sowing is completed; after corn matures in the middle ten days of August, earth surface plants are removed, innocent treatment is carried out, soil at theroots of the plants is taken out and put into the farmland B, and the operation is circulatingly repeated multiple times untill the farmland A is completely repaired; and (4) sedum alfredii hance isplanted in the farmland B all the time, and the operation is circulatingly repeated multiple times until the farmland B is completely repaired. The method is safe, stable, economical and high in repairing efficiency.

Description

technical field [0001] The invention relates to the technical field of soil-polluted phytoremediation, in particular to a method for remediating cadmium-contaminated soil by using Sedum sedum, guest soil method and low-absorbing corn. Background technique [0002] Soil is the material basis for human survival. However, the rapid economic and social development in recent years has caused serious soil cadmium pollution in my country. At present, the cultivated land area polluted by heavy metals in my country is about 2000×10 4 hm 2 , as many as 1200×10 grains are polluted by heavy metals every year 4 t , the economic loss is at least 200×10 8 Yuan. Cadmium (Cd) is one of the most toxic heavy metal elements. It is difficult to degrade and accumulate in metabolism. The toxicity to human tissues and organs is mainly to damage the kidneys and cause osteoporosis and other diseases. Therefore, how to control and reduce cadmium pollution in soil has become an urgent problem ...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 曹建军田泓张剑李空明冯明铭赵慧君张丽萍
Owner NORTHWEST NORMAL UNIVERSITY
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