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Method for controlling the accumulation of the heavy metal cadmium in the rice corn

A heavy metal, rice technology, applied in horticultural methods, botanical equipment and methods, rice cultivation and other directions, can solve the problem of no feasible method, and achieve the effect of overcoming adverse consequences, wide application range, and improving rice mineral nutrients.

Inactive Publication Date: 2008-03-05
CHINA NAT RICE RES INST
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  • Description
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Problems solved by technology

And regulating the redox potential of soil is only the current theoretical speculation, and there is no practical method in actual research and production.

Method used

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Examples

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with specific embodiments and test examples.

[0019] 1. Preliminary verification of iron fertilizer controlling cadmium accumulation in rice

[0020] 1 Experimental design

[0021] 1.1 Test material preparation

[0022] 1.1.1 Cadmium-contaminated soil preparation

[0023] The cadmium-contaminated soil cultivated with purple paddy soil in the Fuyang Experimental Base of China Rice Research Institute and planted with rice for two years was used as the experimental soil for this study. Main physical and chemical properties of the soil: organic matter content 36.9g / kg, total nitrogen 2.73g / kg, total phosphorus 0.6g / kg, total potassium 20.1g / kg, alkaline nitrogen 232mg / kg, ammonium nitrogen 9.7mg / kg, available phosphorus 25.2mg / kg, available potassium 65mg / kg, pH 7.3. The total cadmium content is 5.70mg / Kg, and the cadmium content in DTPA extraction state is 1.76mg / kg. The cadmium-contaminat...

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Abstract

The present invention relates to a method for controlling heavy metal cadmium content in the rice, belonging to the field of paddy rice planting technology. It is characterized by that in the course of land preparation before rice field seedling transplantation the ferrochelate can be applied into the soil, and said ferrochelate and the soil are uniformly mixed; and in the spike formation stage and filling stage of rice the ferrochelate also can be respectively applied in the rice field. Said method can make cadmium content in the rice be less than 0.2mg / kg.

Description

technical field [0001] The invention belongs to the technical field of rice planting, and in particular relates to a method for controlling the accumulation of heavy metal cadmium in rice. Background technique [0002] Cadmium is a toxic heavy metal with a long half-life and an environmental pollutant. In addition to causing acute and chronic poisoning of humans and animals, it also has a strong carcinogenic effect. In recent years, due to industrial "three wastes", sewage irrigation, and large-scale application of pesticides and fertilizers, heavy metal pollution in farmland has intensified, and the safety of heavy metals in rice has become increasingly prominent. According to the results of the 2002 and 2003 rice quality and safety surveys conducted by the Rice and Product Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture, one of the quality and safety problems of rice is that heavy metals such as cadmium and lead exceed the standard, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G16/00A01G7/00B09C1/00B09C1/10A01G22/22
Inventor 邵国胜陈铭学王丹英徐春美章秀福曹赵云牟仁祥覃都
Owner CHINA NAT RICE RES INST
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