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Rice grain heavy metal pollution risk forecasting method based on soil heavy metal DTPA (diethylenetriamine pentaacetic acid) extractable state content

A technology for risk prediction and rice grains, which is applied in soil material testing, preparation of test samples, electrical excitation analysis, etc., to achieve the effect of improving the level of hygiene and safety, ensuring physical health, and high prediction accuracy

Active Publication Date: 2014-03-05
ZHEJIANG JIAXING AGRI SCI ACADEMY INST
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Problems solved by technology

However, there is no relevant report on the relationship between the content of heavy metals in the soil DTPA extraction state and the accumulation of rice grains

Method used

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  • Rice grain heavy metal pollution risk forecasting method based on soil heavy metal DTPA (diethylenetriamine pentaacetic acid) extractable state content
  • Rice grain heavy metal pollution risk forecasting method based on soil heavy metal DTPA (diethylenetriamine pentaacetic acid) extractable state content
  • Rice grain heavy metal pollution risk forecasting method based on soil heavy metal DTPA (diethylenetriamine pentaacetic acid) extractable state content

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0029] Example.

[0030] see Figure 1-9 , the method for predicting the risk of heavy metal pollution in rice grains based on the extracted state content of soil heavy metal DTPA according to the present invention mainly consists of the following steps:

[0031] (1) For two consecutive years in 2002 and 2003, a total of 51 pilot sites (N 29°52′- N 30°50′, E 119°46′-E 121°34′) soil and rice ear samples, including 35 pilot sites in 2002 and 16 pilot sites in 2003. The sampling points are all representative fields in the local area, and the rice varieties are the main varieties in the local area. The sampling time was at the maturity stage of rice, and 5 clusters of about 30-40 ears were randomly selected from each pilot site, and 1 kg of surface soil (0-15 cm) was collected at the same time.

[0032](2) After 30 d...

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Abstract

The invention belongs to the technical field of quality and safety of agricultural products and in particular relates to a model forecasting method for forecasting a rice grain heavy metal accumulation amount based on a soil heavy metal DTPA (diethylenetriamine pentaacetic acid) extractable state content. The key points comprise the following steps: extracting and measuring the heavy metal extractable state content of the soil by using 0.005MDTPA, and sampling and measuring the heavy metal content in the rice produced in the corresponding soil simultaneously, wherein the heavy metal types mainly aim at As, Cd, Cr, Cu, Pb and Ni with great risk of polluting the domestic rice at present; then analyzing data and establishing a forecasting model, forecasting the rick through the forecasting model, comparing the forecasted data with a standard specified by WHO (World Health Organization) or a pollution-free rice standard specified by the nation, and forecasting the heavy metal pollution rick of the rice planted in the region. The invention aims at providing a rich grain heavy metal pollution rick forecasting method which has an environmental-friendly effect, is convenient to operate and high in reliability, so that a basis is provided for selecting production bases of safe and high-quality rice and taking a corresponding complete set of techniques in production in advance.

Description

technical field [0001] The invention belongs to the technical field of agricultural product quality and safety, and in particular relates to a model prediction method for predicting the accumulation of heavy metals in rice grains based on the extracted state content of heavy metal DTPA in soil. Background technique [0002] Many studies have shown that the amount of heavy metals absorbed and accumulated by crops mainly depends on the available soil content rather than the total amount. The availability of soil heavy metals depends on soil factors, mainly including pH, CEC, organic matter content, soil texture, and the interaction effect between heavy metal elements. There are many extraction methods for the effective state of soil heavy metals. ) extracted soil trace elements are considered to be effective for plants. In recent years, many studies have also confirmed that the extracted content of soil heavy metal DTAP is a good indicator for evaluating the content of availa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/66G01N33/24G01N1/28G01N1/38G01N1/44
Inventor 程旺大张国平张红梅邬飞波
Owner ZHEJIANG JIAXING AGRI SCI ACADEMY INST
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