水稻及其根际土壤中六六六、滴滴涕残留量探析

Study on the residues amount of hexachloro-cyclohexane and dichlorodiphenyl trichloroethane in rice and its rhizosphere soil

对四川省水稻及其根际土壤中主要有机氯农药六六六(BCH)和滴滴涕(DDT)残留现状研究结果表明,在抽检的10套样品水稻籽实中均未检出有机氯污染物六六六和滴滴涕,符合国家颁布的食品卫生标准。而根际土壤中普遍检出滴滴涕农药残留,且德阳孝泉镇还检出六六六农药残留,但根据土壤环境质量标准(GB15618—95)其土壤中六六六和滴滴涕的残留尚未超标,符合自然土壤背景值标准。建议继续禁用六六六和滴滴涕农药,并应间断性对食用农产品进行抽样调查,同时尽快禁止食用性植物生产中使用三氯杀螨醇。

The residue status of hexachloro-cyclohexane （BHC） and dichlorodiphenyl trichloroethand （DDT） in rice and its rhizosphere soil in Sichuan Province was studied. The results show that BHC or DDT still exists in soil, however, they are not detected in rice samples. BHC and DDT residue levels accord with the National Health Food Standard. Although DDT is detected in most of rhizosphere soil, BHC is also found in soil from Xiaoquan Town in Deyang County, the status of these two organochlorine pesticides residues in soil don＇t exceed the standard content according to the GB15618-95. So,all the investigated soils accord with the standard of natural background value. In addition, BHC and DDT are advised to be forbidden from using continuously,whilst the code must be established as soon as possible so as to forbid the use of dicofol in the edible vegetable production.