【作者】 李新荣； 赵同科； 李鹏； 李顺江； 张成军；

【Author】 LI Xin-rong,ZHAO Tong-ke~+,LI Peng,LI Shun-jiang,ZHANG Cheng-jun (Institute of Plant Nutrition and Natural Resources,Beijing Academy of Agriculture and Forestry Sciences,Beijing,100097,China)

【机构】 北京市农林科学院植物营养与资源研究所；

【摘要】 为掌握密云县蔬菜地土壤中有机氯农药（OCPs）污染状况及其来源,以密云县太师屯村面源污染技术示范区为研究区域,开展了菜地土壤中有机氯农药残留及来源分析。2009年5月在对密云水库太师屯面源污染核心示范区蔬菜产地随机采集了25个表土样品（0-20cm）测定分析了有机氯农药（包括六六六（HCH）、滴滴涕（DDT）及六氯乙烷、七氯、艾氏剂等16种有机氯农药）的残留水平。实验结果表明,HCH、DDT的浓度算术平均值分别为1.07±0.84、6.54±7.88ng·g^-1（干重）。HCH和DDT的检出率均为100%,但均未超过国家土壤标准,残留污染较轻。根据土壤样品中异构体的比值,可以初步判断HCH主要来自过去施用农药的残留;而DDT可能仍然有新的来源输入,其他种类有机氯农药污染较轻,只有异艾氏剂(浓度范围30.0 ng·g^-1-476.66 ng·g^-1)超标,表明该区域土壤中有该种农药的施用或残留。更多还原

【Abstract】 This paper presents the results of organochlorine pesticides（OCPs） in the surface soil of vegetable plots in Miyun County,Beijing.Twenty-five topsoil samples（0-20cm） were collected to determine the organochlorine residues from the vegetable base in the Taishitun Village,the research sites of agricultural non-point source pollution.The average measured concentrations of HCH and DDT were 1.07±0.84 and 6.54±7.88 ng·g^-1,separately（dry weight;n = 25;shown as arithmetic mean and standard deviation）,which were lower than most of the results reported in literatures.Both of the detectable rates of HCH and DDT were 100%and the residual levels was lower than most of other Chinese region.According to the values of isomers ratios,it show that HCH mainly from residues,but there were still new DDT have entered soil of the studied area.Other types of organochlorine pesticide contamination were lighter,but isodrin(range,30.0 ng·g^-1-476.66 ng·g^-1) exceeded the standard,indicating that the new application or residues of this kind of pesticides in the research region.更多还原