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Method for producing rape-middle rice in crop rotation way in cadmium-contaminated soil while repairing

A technology for cadmium-contaminated soil and rapeseed, which is applied in the field of environmental governance of polluted soil, can solve the problems of slow growth and small biomass, and achieve the effects of small engineering volume, no loss of economic benefits, and simple technical management

Active Publication Date: 2019-03-29
ZHEJIANG UNIV
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Problems solved by technology

However, hyperaccumulative plants are mostly slow-growing herbs with small biomass, so simple phytoremediation usually takes at least 2-3 years

Method used

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  • Method for producing rape-middle rice in crop rotation way in cadmium-contaminated soil while repairing
  • Method for producing rape-middle rice in crop rotation way in cadmium-contaminated soil while repairing

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Embodiment 1

[0036] 1. Implementation location: Zhangjiadian Village, Meizhu Town, Xinchang County, Shaoxing City, Zhejiang Province

[0037] The soil in Zhangjiadian Village, Meizhu Town, Shaoxing City belongs to the paddy soil category, a subcategory of paddy soil, and the soil type is yellow mud sand field. The total cadmium content is 0.45mg / kg, exceeding the limit for farmland in the Soil Environmental Quality Standard (GB 15618-2008).

[0038] The enriched crop variety is: Rapeseed-Zheyou 50, which is a cadmium-enriched variety obtained from the previous screening in our laboratory.

[0039] Rape cadmium high-efficiency activator is a compound endophytic bacterial agent fermentation liquid independently developed by our laboratory. It is disclosed in the patent document with the publication number CN105950502A. It is 1L per mu, diluted 20 times with water, and sprayed during the bolting and flowering stages of rapeseed.

[0040] Soil cadmium high-efficiency passivation conditioner i...

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Abstract

The invention discloses a method for producing rape-middle rice in a crop rotation way in cadmium-moderately-contaminated soil while repairing, and belongs to the technical field of environmental governance of the contaminated soil. The method comprises the following steps: (1) planting rape Zheyou 50 in the cadmium-contaminated soil, spraying a cadmium activator on rape leaf surfaces respectivelyin a bolting period and a flowering period, cultivating until harvest, and removing all; (2) leveling the soil, applying a cadmium passivation conditioner and evenly mixing with surface soil; and (3)after 6-8 days, transplanting middle rice Yongyou 15, performing submergence treatment during a whole growth period, spraying a zinc-enhanced cadmium resistance control agent on leaf surfaces respectively at a tillering stage, a booting stage and a grain-filling stage, draining water in the fields one week before the harvest of the middle rice, and removing all straw after the harvest of the middle rice. The method disclosed by the invention utilizes crop rotation of the cadmium-enriched rape and the cadmium low-accumulation high-quality middle rice to cooperate with reasonable water management, and can be used for repairing the soil while guaranteeing the safe and high-quality production of crops.

Description

technical field [0001] The invention relates to the technical field of environmental treatment of polluted soil, in particular to a method for repairing rapeseed-medium rice rotation while producing moderately cadmium polluted soil. Background technique [0002] Modern industry promotes economic development and speeds up the modernization process, but at the same time, the problem of heavy metal pollution is becoming more and more serious. The area of ​​soil pollution is increasing year by year, and the pollution degree is becoming more and more serious. Cadmium is the first of the inorganic pollutants, and the problem of cadmium pollution in farmland is one of the main environmental problems facing our country at present. Cadmium in farmland has a serious toxic effect on crops, manifested as growth retardation, reduced yield, and reduced quality. Moreover, cadmium in crops will enter the human body through the food chain, endangering human health. [0003] Rice is the mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 杨肖娥唐琳亚西尔·哈米德曹雪蕊林强王小子陈锋
Owner ZHEJIANG UNIV
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