从稻田转变为菜地的土地利用变化对土壤中有机氯农药残留的影响。
Effect of land use change from paddy to vegetable field on the residues of organochlorine pesticides in soils.
作者信息
Hao Hongtao, Sun Bo, Zhao Zhenhua
机构信息
Institute of Soil Science, Chinese Academy of Sciences, No. 71 East Beijing Road, P. O. Box 821, Nanjing 210008, China.
出版信息
Environ Pollut. 2008 Dec;156(3):1046-52. doi: 10.1016/j.envpol.2008.04.021. Epub 2008 Jun 13.
The effect of land use change from paddy to vegetable field on the residues of organochlorine pesticides (OCPs) was investigated. Soil residues of OCPs were analyzed in vegetable fields which had been converted from paddy fields for 0, 5, 10, 15, 20, 30, 50 year in Yixing, China in 2003. The mean concentrations of OCPs followed a sequence of: SigmaDDTs (13.7 microg kg(-1))> SigmaHCHs (8.6 microg kg(-1)) >>HCB (2.09 microg kg(-1))>alpha-endosulfan (1.30 microg kg(-1))>endrin (1.08 microg kg(-1))>PCNB (0.76 microg kg(-1))>dieldrin (0.58 microg kg(-1)). The mean residues of OCPs especially DDTs increased significantly with vegetable planting time after land use change in the first 15 years, then decreased from 20 to 30 years and increased a little afterward. The time under anaerobic and aerobic conditions was suggested to control mainly the change of the residues of OCPs.
研究了从稻田转变为菜地的土地利用变化对有机氯农药（OCPs）残留的影响。2003年在中国宜兴，对已从稻田转变为菜地0年、5年、10年、15年、20年、30年、50年的菜地土壤中的OCPs残留进行了分析。OCPs的平均浓度顺序为：Σ滴滴涕（13.7微克/千克）＞Σ六氯环己烷（8.6微克/千克）＞＞六氯苯（2.09微克/千克）＞α-硫丹（1.30微克/千克）＞异狄氏剂（1.08微克/千克）＞五氯硝基苯（0.76微克/千克）＞狄氏剂（0.58微克/千克）。土地利用变化后的前15年，OCPs尤其是滴滴涕的平均残留量随着蔬菜种植时间显著增加，然后在20年至30年期间下降，之后又略有增加。厌氧和好氧条件下的时间被认为主要控制着OCPs残留量的变化。
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