%0 Journal Article
%T Temporal trend of organic chlorinated pesticides residues in soils of orchard, Beijing<br>果园土壤有机氯农药残留的时间趋势研究
%A SHI Yajuan~
%A <br>史雅娟
%A 郭非凡
%A 孟凡乔
%A 吕永龙
%A 王铁宇
%A 张红
%J 环境科学学报
%D 2005
%I 
%X With barren and vegetable soils as control, in 1993 and 2003, the concentrations of Organic Chlorinated Pesticides (OCPs) were measured in topsoils of a selected orchard in Beijing, which was divided into old and new orchard groups, according to the different cultivation history. The results indicated that OCPs (HCHs and DDTs) degraded greatly in the 20 years after the prohibition of their usage. And the levels of total DDTs and HCHs in the old orchard were significantly higher (P<0.05) than those in the new. Moreover, the residual levels of HCHs and DDTs in the orchard were higher than those in barren and vegetable soils (P<0.05). The pollution potential was assessed on the basis of environmental limits of the greenfood production area in China. New orchard was suitable for the production of greenfood, while old orchard was not suitable, due to relatively higher DDT and HCH pollution.
%K Organic Chlorinated Pesticides (OCPs)
%K Persistent Organic Pollutants (POPs)
%K temproral trend
%K greenfood<br>土壤污染
%K 有机氯农药
%K 农药残留量
%K 绿色食品
%K 持久性有机污染物
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=3593E31792E590AF&yid=2DD7160C83D0ACED&vid=C5154311167311FE&iid=38B194292C032A66&sid=C2F76551C0111538&eid=3C6F5C97A07587AE&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=12&reference_num=28