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| Residue and Pollution Characteristics of HCHs and DDTs in Crops and Soils in Caohai Watershed in Guizhou |
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| KeyWord:soil; crop; DDTs; HCHs; residues; Caohai watershed |
| Author Name | Affiliation | | ZHANG Jia-chun | Guizhou University, Guiyang 550025, China | | LIN Shao-xia | Guizhou Research Center of Physical Test and Chemical Analysis,Guiyang 550002, China | | ZHANG Qing-hai | Guizhou Research Center of Physical Test and Chemical Analysis,Guiyang 550002, China | | HE Teng-bing | Guizhou University, Guiyang 550025, China | | LIN Chang-hu | Guizhou University, Guiyang 550025, China
Guizhou Academy of Sciences, Guiyang 550001, China |
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| Abstract: |
| We collected whole crop plants at their maturity stage and soils in the watershed of Caohai, measured concentrations of DDTs and HCHs in both crops and soils, and then determined their enrichments in crops. The detection rates of both HCHs and DDTs in soils were 100%, and their residues ranged 0.06~16.66 μg·kg-1 and 0.08~39.77 μg·kg-1, respectively. The concentrations of HCHs and DDTs in soils were below the first class levels of the National Soil Environmental Quality. The residues of DDTs, HCHs and Σ（DDTs，HCHs） were significantly different among three crops, with the highest HCHs in corn, and greatest DDTs and Σ（DDTs，HCHs） in potato. The risk factors of HCHs and DDTs were 1.1 for three crops, belonging to low risk. The Security Index（IFSC） of DDTs, HCHs and Σ（DDTs，HCHs） were all less than 1 in three crops. Therefore, the risks of HCHs and DDTs in three crops were acceptable. |
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