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异丙甲草胺及其高效体对我国南方潮土微生物的影响Ⅰ-过氧化氢酶

周瑛1,2;刘维屏1;王婷婷2   

  1. 1浙江大学环境科学研究所,杭州 310029;2浙江工业大学化工与材料学院,杭州 310032

  • 收稿日期:2004-03-22 修回日期:2004-07-03 出版日期:2005-05-18

Effects of pesticides metolachlor and S-metolachlor on soil microorganisms in quisols of Southern China Ⅰ.Catalase activity

ZHOU Ying1,2,LIU Weiping1,WANG Tingting2   

  1. 1Institute of Environmental Science,Zhejiang University,Hangzhou 310029, China;2College of Chemical Engineering and Materials Science,Zhejiang University of Technology,Hangzhou 310032,China

  • Received:2004-03-22 Revised:2004-07-03 Online:2005-05-18

摘要: 研究了0、5、20和100 mg·kg-1浓度的异丙甲草胺及其高效体对土壤过氧化氢酶活性的影响.结果表明,不同浓度的异丙甲草胺处理对过氧化氢酶活性的影响不同,20 mg·kg-1处理的土壤过氧化氢酶受到激活的程度最大,且一直处于激活状态,5 mg·kg-1处理的土壤过氧化氢酶在前期受到抑制,后期则100 mg·kg-1处理的土壤过氧化氢酶受激活较强.不同浓度的金都尔对供试土壤过氧化氢酶活性的影响表现为先激活、后抑制、再激活,并且后期100 mg·kg-1处理的激活程度最大;5 mg·kg-1和100 mg·kg-1处理的异丙甲草胺对供试土壤生态环境的影响和危害可能大于金都尔,但20 mg·kg-1处理则表现出例外.

关键词: 民勤绿洲, 景观变化, 景观指数, 驱动力

Abstract: This paper studied the effects of different concentrations (0,5,20,and 100 mg·kg-1) metolachlor and its enantiomer S-metolachlor (Dual Gold) on soil catalase activity.The results showed that 20 mg·kg-1 metolachlor had the most successive stimulating effect,5 mg·kg-1 metolachlor had an inhibitory effect in the early period,while 100 mg·kg-1 metolachlor had a stimulating effect in the late period.Different concentrations Dual Gold displayed a tendency stimulation-inhibition-stimulation.5 and 100 mg·kg-1 metolachlor might have more damage on soil ecosystem than different concentrations Dual Gold.

Key words: Minqin oasis, Landscape change, Landscape index, Driving force