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Method for improving phytoremediation efficiency of farmland soil with light cadmium pollution by using potash fertilizer

A technology for phytoremediation and cadmium pollution, which is applied in the field of remediation of polluted environments, can solve the problems of not being able to effectively increase the accumulation of cadmium in the aboveground parts of plants, and achieve the effects of improving restoration efficiency, easy cultivation and management, and increasing accumulation

Inactive Publication Date: 2012-07-18
ZHEJIANG UNIV
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Problems solved by technology

[0006] In the article "Nitrogen Fertilizer and Potassium Fertilizer Strengthen Solanum Solanum to Remediate Cadmium Contaminated Soil", the author compared the effect of three concentrations of potassium chloride fertilizer, 100mgkg-1, 300mgkg-1 and 600mg kg-1, on the restoration of cadmium pollution; but the results showed that the application of chloride Potassium cannot effectively increase the accumulation of cadmium in the aboveground parts of plants, so as to achieve the purpose of improving the restoration efficiency

Method used

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  • Method for improving phytoremediation efficiency of farmland soil with light cadmium pollution by using potash fertilizer
  • Method for improving phytoremediation efficiency of farmland soil with light cadmium pollution by using potash fertilizer
  • Method for improving phytoremediation efficiency of farmland soil with light cadmium pollution by using potash fertilizer

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Embodiment 1

[0028] Embodiment 1, a kind of method that utilizes potash fertilizer to improve the phytoremediation efficiency of mild cadmium polluted farmland soil, carries out the following steps successively:

[0029] 1) In mildly cadmium-contaminated soil, transplant cadmium super-accumulating plants—Sedum alfredii H. seedlings (the height of the aboveground part of the seedlings is 5-8 cm) for planting, and plant them at a rate of 5-8 cm per mu. Apply 2.3 to 2.5kg of pure K potassium sulfate fertilizer for fertilization;

[0030] The above-mentioned transplanting is cutting transplanting or transplanting after pre-cultivation under hydroponic conditions.

[0031] Potassium sulfate fertilizer is applied as a base fertilizer all at once; when applied, it is directly applied to the soil in solid form. During the planting period of sedum sedum, regular watering is required so that the slightly cadmium-contaminated soil planted with sedum sedum maintains 60% to 80% of the field water capa...

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Abstract

The invention discloses a method for improving phytoremediation efficiency of farmland soil with light cadmium pollution by using potash fertilizer, which comprises the following steps in sequence: (1) transplanting seedlings of a plant with super cadmium accumulation, particularly referring to the seedlings of sedum alfredii hance, in soil with the light cadmium pollution and fertilizing 2.3-2.5Kg of pure potassium in a form of sulfate fertilizer per mu; and (2) harvesting overground parts of the sedum alfredii hance when the overground parts of the sedum alfredii hance are 50-60cm high. after used for repairing the farmland soil with the light cadmium pollution, the method disclosed by the invention has the advantages of being high-efficiency, economical, green, environment-friendly and the like.

Description

technical field [0001] The invention relates to the technical field of remediation of polluted environment, in particular to a method for improving phytoremediation efficiency of mildly cadmium-polluted farmland soil by using potassium fertilizer. Background technique [0002] With the rapid growth of industrial and agricultural production and economy in our country, the problem of heavy metal pollution in the soil-plant-environment system is becoming more and more serious. According to statistics, the area of ​​cultivated land polluted by heavy metals such as cadmium in my country is nearly 20 million hectares, accounting for about 1 / 5 of the total area of ​​cultivated land in my country. Soil is the foundation of agricultural production, and food safety issues caused by soil heavy metal pollution are often reported in the newspapers. For example, the cadmium depth in rice produced in a sewage irrigation area in Shenyang is as high as 0.4-1.0mg kg -1 , reaching or exceedin...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 杨肖娥高峻
Owner ZHEJIANG UNIV
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