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Method adopting sodium nitroprusside for controlling rice heavy metal mercury accumulation

A technology of sodium nitroprusside and heavy metals, which is applied in the field of rice planting, can solve the problems of not being able to solve practical problems well, reducing the content of available mercury in soil, unfavorable rice growth, etc., and achieving no toxic side effects, low price, and mercury control. the cumulative effect of

Active Publication Date: 2015-02-04
CHINA JILIANG UNIV
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Problems solved by technology

However, controlling the accumulation of cadmium in rice through these methods also produced a large number of unavoidable side effects, such as the application of lime to increase the soil pH, while reducing the available mercury content in the soil, it also reduced a variety of mineral micronutrients such as iron, manganese, and copper. , zinc, etc., which are unfavorable for rice growth
And most of them are in the stage of theoretical speculation, failing to solve practical problems well

Method used

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  • Method adopting sodium nitroprusside for controlling rice heavy metal mercury accumulation
  • Method adopting sodium nitroprusside for controlling rice heavy metal mercury accumulation
  • Method adopting sodium nitroprusside for controlling rice heavy metal mercury accumulation

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Embodiment Construction

[0016] 1. Test materials

[0017] The test site is located in Wanshan District, Tongren City, Guizhou Province. The test rice variety is the main local variety. The seedlings were transplanted on June 16 and harvested on October 8. Planted in soil with mercury pollution level three or above (Pb, As, Cd and Cr have not reached the pollution level), the main physical and chemical properties of the test soil are shown in Table 1. The following reagents are of superior grade.

[0018] Table 1 Basic physical and chemical properties of soil

[0019]

[0020] 2. Specific experimental design

[0021] In the sample field plot experiment, the rice planting mode is: each plot covers an area of ​​3.5m*4.0m, the spacing between plants and rows is 0.35m*0.25m, and there are 135 clusters. Ridges are built between each plot and plastic film is added to prevent seepage. 3 repetitions. Unless otherwise specified, soil preparation, seedling raising, transplanting, and field management...

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Abstract

The invention discloses a method adopting sodium nitroprusside for controlling rice heavy metal mercury accumulation. The method sequentially comprises the following steps that (1) after the soil preparation, rice seedlings are transplanted; (2) the sodium nitroprusside is prepared into a water solution with the concentration being 1 to 50mg / L, the sodium nitroprusside solution is sprayed onto leaves by a sprayer on 7th day to 21st day after the rice transplanting, 1st day to 7th day in the flowering stage and 7th day to 21st day in the flowering period, and 3L of the water solution is uniformly sprayed in each 3.5m*4.0m region. The sodium nitroprusside solution with the proper concentration is sprayed in each growth period of the rice, so the mercury content of the produced rice is respectively reduced by 30 percent to 50 percent, and in addition, in the rice production process, agricultural conventional methods are respectively adopted for land preparation, seedling culture, transplanting and field management.

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 mercury in rice by using sodium nitroprusside. Background technique [0002] Mercury is a heavy metal element widely distributed in nature. It is a non-essential element for plant growth, and it is also one of the most toxic heavy metals. At present, mercury pollution has become a worldwide environmental pollution problem. In the 1950s, the "water disease" event caused by mercury pollution in Japan attracted widespread attention. [0003] Under natural conditions, mercury is widely deposited in crustal minerals. Mercury in soil mainly comes from weathering of crustal materials, volcanic activities, geothermal activities, etc. The mercury content in unpolluted cultivated soil is very low. With the development of modern industry and agriculture, the discharge of three wastes, mining of minerals, irrigat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G16/00A01G7/06A01G22/22
CPCA01G7/06A01G22/22
Inventor 朱诚刘周萍王飞娟丁艳菲江琼孙骏威
Owner CHINA JILIANG UNIV
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