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A kind of method of middle-season rice-wheat rotation in cadmium slightly polluted soil

A technology for polluted soil and middle rice, which is applied in the field of polluted soil environmental treatment, achieves the effects of less investment, simple technical management, and improved human nutrition and health

Active Publication Date: 2021-02-09
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, there are relatively few in situ remediation methods for cadmium that do not interrupt agricultural production at all.

Method used

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  • A kind of method of middle-season rice-wheat rotation in cadmium slightly polluted soil
  • A kind of method of middle-season rice-wheat rotation in cadmium slightly polluted soil

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Embodiment 1

[0035] 1. Implementation location: Xinzhong Village, Yulin Street, Xinchang County, Shaoxing City, Zhejiang Province

[0036] The soil in Xinzhong Village, Yulin Street, Shaoxing City belongs to the paddy soil category, a subcategory of paddy soil, and the soil type is brown big mud field. The total cadmium content is 0.35mg / kg, exceeding the limit value for farmland in the Soil Environmental Quality Standard (GB 15618-2008).

[0037] The low-accumulation crop varieties are: mid-season rice-Yongyou 7850, wheat-Ningmai 13, all of which are low-accumulation high-quality varieties obtained by our laboratory's previous screening.

[0038] Soil cadmium high-efficiency passivation conditioner is independently developed by our laboratory. The components are: lime 30%, sepiolite 30%, zeolite 20%, biochar 20%, mix well and add appropriate amount of water to granulate, apply 200L per mu , and mix it with the plow layer soil, then flood the fields, and transplant mid-season rice a week ...

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Abstract

The invention discloses a method for cropping mid-season rice-wheat in lightly cadmium-polluted soil, and belongs to the technical field of polluted soil environment treatment. The method comprises: (1) 5-8 days before crop transplanting, applying soil cadmium passivation conditioner on cadmium lightly polluted soil, and mixing with plow layer soil; (2) transplanting mid-season rice Yongyou 7850 , the entire growth period was flooded, and zinc-enhanced cadmium inhibitors were sprayed on the leaves at the tillering stage, booting stage, and grouting stage, and the field water was drained one week before the mid-season rice was harvested; (3) After the mid-season rice was harvested, the straw was all removed Then the wheat Ningmai 13 was broadcast directly, cultivated until harvested, and all wheat stalks were removed. According to the mid-season rice-wheat rotation mode of the present invention, the restoration of cadmium-contaminated soil is completed under the condition that agricultural production is completely normal, without loss of economic benefits, and is easily accepted by farmers, and the harvested straw is removed from the farmland without causing secondary pollution. Pollution.

Description

technical field [0001] The invention relates to the technical field of environmental treatment of polluted soil, in particular to a method for avoiding restoration of mid-season rice-wheat rotation in cadmium-slightly polluted soil. Background technique [0002] Soil cadmium pollution is an important environmental problem faced by human beings, and the polluted area is increasing year by year. Cadmium in farmland can inhibit plant growth, reduce crop yields, and enter the human body through the food chain, endangering human health. At present, the technologies used in the remediation of cadmium-contaminated soil in my country mainly include guest soil method, freezing method, solidification method, chemical leaching method, ion exchange method and chelation method, etc. It is easy to cause secondary pollution and is difficult to be applied in a large area. [0003] Rice and wheat are the main grain crops in my country, accounting for more than 80% of the total grain output,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G22/20A01G22/22A01G7/06A01B79/02
CPCA01B79/02A01G7/06A01G22/20A01G22/22
Inventor 杨肖娥唐琳亚西尔·哈米德林强
Owner ZHEJIANG UNIV
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