Method for remedying cadmium-contaminated soil through inter-planting of cadmium accumulator plants and fruit trees

A technology for cadmium-contaminated soil and enrichment of plants is applied in the field of restoration of cadmium-contaminated farmland by intercropping of sedum sedum sedum and commercial crop citrus, which can solve problems such as unreasonable plants, achieve high nutritional value and low input cost , the effect of strong enrichment ability

Inactive Publication Date: 2019-03-19
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Problems solved by technology

However, unreasonable plant intercropping may cause competition among plants for sunlight, water and nutrients

Method used

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  • Method for remedying cadmium-contaminated soil through inter-planting of cadmium accumulator plants and fruit trees
  • Method for remedying cadmium-contaminated soil through inter-planting of cadmium accumulator plants and fruit trees
  • Method for remedying cadmium-contaminated soil through inter-planting of cadmium accumulator plants and fruit trees

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Embodiment Construction

[0034] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0035] At first introduce the eight-treasure sedum involved in the embodiment of the present invention:

[0036] Babao Sedum is a perennial succulent herb of the Sedum family and Babao genus. The underground stems are thick, and the aboveground stems are clustered, thick and upright. The whole plant is gray-green, with a plant height of 40-50cm. Wavy teeth. The corymbs are densely shaped like flat heads, with a diameter of 10 to 13 cm. The flowers are light pink, and there are also white, purple, and rose red varieties. They are the most colorful species in the Sedum family. Babao sedum likes strong light, dry and well-ventilated environment, and can tolerate mild shade, and can withstand low temperatures of -20°C; it ...

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Abstract

The invention provides a method for remedying cadmium-contaminated soil through inter-planting of cadmium accumulator plants and fruit trees. The method comprises the steps that cadmium accumulator Sedum Spectabile Boreau and low-cadmium-accumulation commercial crop citruses are selected and inter-planted in the cadmium-contaminated soil, and a large quantity of cadmium in the soil is absorbed bya root system of the Sedum Spectabile Boreau and is transferred over the ground; when the Sedum Spectabile Boreau reaches 40-50cm, the overground parts of the Sedum Spectabile Boreau are removed fromthe cadmium-contaminated soil, so that the cadmium in the cadmium-contaminated soil is removed; the cadmium content of the harvested parts of the screened-out low-cadmium-accumulation commercial cropcitruses is lower than the relevant standard, so that the purpose of remedying the cadmium-contaminated soil during production is realized; after harvesting, the Sedum Spectabile Boreau can continue to grow to absorb cadmium in the soil, and the overgroud parts can be cut again to remedy the cadmium-contaminated soil when the Sedum Spectabile Boreau grows to 40-50 cm; and the citruses perennial crops and can continue to grow to be harvested after being harvested. The method is reasonable in design, easy to operate, low in cost and capable of being used for remedying the cadmium-contaminated soil, and has good environmental, economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to a phytoremediation technology polluted by heavy metals in soil, in particular to a method for repairing cadmium-contaminated farmland by intercropping sedum sedum sedum and economic crop citrus. Background technique [0002] Soil is the natural environment on which human beings depend and an important resource for agricultural production. The health of the soil environment is related to the quality of agricultural products and human health. In recent years, soil heavy metal pollution has become a serious environmental problem facing the world. At present, my country's farmland soil is seriously polluted by heavy metals. According to the results of the first national survey on soil pollution, the over-standard rate of cultivated land soil points in my country is 19.4%, of which the proportions of slightly, lightly, moderately and heavily polluted points are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105B09C2101/00
Inventor 杨军杨俊兴郭俊娒陈同斌
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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