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Method for mid-season rice-wheat rotation in cadmium mild contamination soil

A technology for polluted soil and middle rice, which is applied in the field of polluted soil environmental management to achieve the effects of simple technical management, improved human nutrition and health, and low investment.

Active Publication Date: 2019-04-02
ZHEJIANG UNIV
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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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  • Method for mid-season rice-wheat rotation in cadmium mild contamination soil
  • Method for mid-season rice-wheat rotation in cadmium mild contamination 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 mid-season rice-wheat rotation in cadmium mild contamination soil and belongs to the technical field of contamination soil environment management. The method includes: (1), in 5-8d before crop transplanting, applying a soil cadmium passivation conditioner on the cadmium mild contamination soil, and well mixing with plough layer soil; (2), transplanting mid-season rice Yongyou 7850, waterflooding in the whole growth period, spraying a zinc reinforced cadmium blocking and controlling agent to leaves in the tillering period, the booting period and the groutingand fruiting period respectively, and draining field water in one week before harvesting mid-season rice; (3), fully moving out straw after the mid-season rice is harvested, directly sowing wheat Ningmai 13, cultivating to harvesting, and removing wheat straw completely. According to the mid-season rice-wheat rotation mode in the method, repair of the cadmium mild contamination soil is completedwhen agricultural production is completely normal, and the method is free of economic benefit loss and easy for farmers to accept; harvested straw is moved out of farmland, so that no secondary pollution is caused.

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 Applications(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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