Method for controlling rice heavy metal mercury accumulation by salicylic acid

A technology for applying salicylic acid and heavy metals, applied in the fields of application, rice cultivation, fertilization methods, etc., can solve practical problems, reduce soil effective mercury content, unfavorable rice growth and other problems, and achieve the application method Simple, non-toxic and side effects, low-cost effect

Inactive Publication Date: 2014-12-24
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 for controlling rice heavy metal mercury accumulation by salicylic acid
  • Method for controlling rice heavy metal mercury accumulation by salicylic acid
  • Method for controlling rice heavy metal mercury accumulation by salicylic acid

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Experimental program
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Embodiment Construction

[0015] 1. Test materials

[0016] 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.

[0017] Table 1 Basic physical and chemical properties of soil

[0018]

[0019] 2. Specific experimental design

[0020] 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 for controlling rice heavy metal mercury accumulation by salicylic acid. The method is characterized by sequentially comprising the following steps that (1) after the soil preparation, rice seedlings are transplanted; (2) the salicylic acid is prepared into a water solution with the concentration being 1 to 50mg/L, after 7 to 21 days of the rice transplanting, on the 1st to 7th days of the jointing period, the 1st to 7th days of the flowering period and the 7th to 21st days of the flowering period, the salicylic acid solution is sprayed on leaf surfaces by a sprayer, and 3L salicylic acid solution is uniformly sprayed in each region with the dimension being 3.5m*4.0m. Through the spraying of the salicylic acid solution with the proper concentration in each growth period of the rice, the mercury contents of the produced rice are respectively reduced by 30 percent to 60 percent, and in addition, a conventional agricultural method can be adopted for soil preparation, seedling culture, transplanting and field management in the rice production process.

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 salicylic acid. 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, irrigation of sew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G16/00A01G1/00A01C21/00A01G22/22
Inventor 朱诚王飞娟刘周萍丁艳菲江琼孙骏威
Owner CHINA JILIANG UNIV
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