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Method of quickly repairing cadmium polluted cultivated land by crop rotation of cadmium super-enriching plant and energy plant

A technology of super-enrichment plants and energy plants, applied in the restoration of polluted soil, etc., can solve the problems of difficult to meet the rapid restoration of cultivated land pollution, low heavy metal concentration, slow economy, etc., to improve the efficiency of cadmium restoration and increase the cadmium Extraction amount, effect of reducing idle time

Inactive Publication Date: 2018-06-05
北京复天科技有限公司
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Problems solved by technology

However, most hyperaccumulator plants have small biomass, slow growth, and poor economic efficiency, while plants with economic benefits and large biomass generally have low concentrations of heavy metals in their bodies, and often have too long remediation cycles, making it difficult to meet the needs of rapid remediation of cultivated land pollution.

Method used

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  • Method of quickly repairing cadmium polluted cultivated land by crop rotation of cadmium super-enriching plant and energy plant
  • Method of quickly repairing cadmium polluted cultivated land by crop rotation of cadmium super-enriching plant and energy plant

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Embodiment 1

[0044] Embodiment 1, cadmium polluted cultivated land remediation test

[0045] 1. Overview of the test area

[0046] The test area is located in a county in Hunan Province, which has a subtropical monsoon climate, with an average annual temperature of 17°C and an average annual precipitation of 1392 mm. The test site is the farmland polluted by heavy metals in the mining area. Due to the long-term atmospheric deposition and sewage irrigation of the upwind metal smelter, the cadmium in the farmland soil slightly exceeds the standard, the soil pH value is 5.2, and the average cadmium concentration in the soil plow layer is 0.6mg / kg .

[0047] 2. Experimental design

[0048] The experimental area includes 1 control plot and 2 treatment groups, which are repeated 3 times, the number of plots is equal to the number of treatments, and each treatment group is 6m×10.5m.

[0049] The specific treatments were as follows: treatment group 1 was a single species of sedum with sedum (CK...

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Abstract

The invention discloses a method of quickly repairing a cadmium polluted cultivated land by crop rotation of a cadmium super-enriching plant and an energy plant. The method comprises the following step: planting the cadmium super-enriching plant and the energy plant in the cadmium polluted cultivated land in the natural growth periods thereof for conventional cultivation to achieve the purpose ofrepairing the cadmium polluted cultivated land by means of adsorbing and enriching abilities of the cadmium super-enriching plant and the energy plant, wherein the cadmium super-enriching plant is sedum plumbizincicola and the energy plant is sorghum or oilseed rape. The invention provides a planting mode which is not limited by growth seasons. Based on one year as the repair period, the soil repair efficiency of the polluted cultivated land is increased by means of a relatively long growth period in multi-cropping plantation, and the method is short in repair period, high in operability and low in cost, and repairs the land more thoroughly.

Description

technical field [0001] The invention relates to a method for rapidly repairing cadmium-contaminated cultivated land by using hyperaccumulator plants and energy plants in rotation and planting, and belongs to the technical field of phytoremediation of polluted soil. Background technique [0002] With the accelerated development of urbanization and industrialization, the increasingly serious problem of soil heavy metal pollution has posed a serious threat to human health and social development. The aggravation of soil heavy metal pollution not only affects the normal use of farmland soil and causes the deterioration of groundwater quality, but also brings about problems in the quality and quality of agricultural products, which seriously threatens the safety of human settlements and ecological environment. In recent years, there have been frequent incidents of heavy metal pollution in a large area of ​​cultivated land across the country. The State Council issued the "Soil Pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 黄惠范天立陈四海张罡周贵宇刘彬杨槟赫王志刚罗志海张隆隆张伟
Owner 北京复天科技有限公司
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