广州地区农田土壤中有机氯农药残留分布特征

以网格法在农田土壤中均匀布点，采集土壤样品75个，对广州地区农田土壤中有机氯农药含量及分布状况进行了研究。结果表明，试区土壤有机氯农药的检出率为100％，表明广州地区农田土壤中有机氯农药残留现象普遍存在。六六六（HCHs）和滴滴涕（DDTs）的平均含量分别为42．75μg/kg、52．76μg/kg，含量范围分别在1．35—803．72和2．73—1036．90μg/kg。与国内不同区域的同类研究相比，广州地区土壤的有机氯残留水平较高。在不同利用类型土壤中，有机氯残留状况有所差异，六六六在水稻土中残留量最高，而滴滴涕在菜园土中含量最高。

Organochlorine Pesticide Residues in Cultivated Soils in Guangzhou Area

The organochlorine pesticide residues and distribution character of 75 sample in the cultivated soils were measured. The results showed that organochlorine pesticide residues were found widely in all samples, and the mean residues of HCHs and DDTs were 42. 75 μg/kg and 52. 76 μg/kg with a range of 1.35 - 803. 72 and 2.73 - 1 036. 90 μg/kg. Compared to the refence data, the residue level in soils of Guangzhou was higher than those in other areas of China. Some differences in organo- chlorine pesticide residues were found in different soils.