荆州城郊蔬菜基地土壤农药残留污染分析

Analysis on Pesticide Residue in the Soil of Vegetables Base in Jingzhou Suburb

通过对荆州市城郊多点土壤农药残留的检测分析,结果表明,所有取样点土壤都检测出了农药的残留,均存在农药污染的情况,且存在地区差异。其中有机氯类农药由于高残留、不易降解的特性,在土壤中仍有残留;HCH的残留检测结果低于国家标准,而DDT的残留量则高于国家二级检出限;有机磷存在超标现象,与有机磷在这些地区的使用量过大,且使用不科学有关。

The soil samples in Jingzhou suburb were analyzed for the pesticide residue.The results showed that pesticide residues could be detected from all the samples,thus all the plots were contaminated,but the pollution degree differed from district to district.Among the residues detected,there remained the residues of organochloride pesticides POPs in soil because of their characters of high remnant and non-degradation.The density of HCH was lower than national standards while the density of DDT was higher than national secondary detection limit.The density of organophosphorus pesticide was out of limits due to the overuse and improper use in these districts.