文章摘要
袁敏,唐美珍,罗彦鹤,常文韬,闫佩,宋兵魁,邢志杰,赵晶磊,廖光龙.盐胁迫下甲维盐·毒死蜱对菜田土壤微生物生态效应研究[J].农业环境科学学报,2015,34(10):1936-1942.
盐胁迫下甲维盐·毒死蜱对菜田土壤微生物生态效应研究
Effects of Salt and Emamectin Benzoate-Chlorpyrifos Mix on Ecological Characteristics of Microorganisms in Vegetable Soil
投稿时间:2015-04-30  
DOI:10.11654/jaes.2015.10.014
中文关键词: 盐胁迫  甲维盐·毒死蜱  土壤微生物  土壤酶活性  正交实验
英文关键词: salt stress  emamectin benzoate-chlorpyrifos mix  soil microbe  soil enzyme activity  orthogonal experimental design
基金项目:山东省自然科学基金(ZR2013EEQ009)资助;科技惠民计划项目蓟县水源保护区农村生态环境改善科技惠民综合示范项目(2012GS120201)
作者单位E-mail
袁敏 天津市环境保护科学研究院, 天津 300191  
唐美珍 曲阜师范大学南四湖湿地生态与环境保护重点实验室, 山东 曲阜 273165 tmzh0816@163.com 
罗彦鹤 天津市环境保护科学研究院, 天津 300191  
常文韬 天津市环境保护科学研究院, 天津 300191  
闫佩 天津市环境保护科学研究院, 天津 300191  
宋兵魁 天津市环境保护科学研究院, 天津 300191  
邢志杰 天津市环境保护科学研究院, 天津 300191  
赵晶磊 天津市环境保护科学研究院, 天津 300191  
廖光龙 天津市环境保护科学研究院, 天津 300191  
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中文摘要:
      采用实验室盆栽方法,运用正交试验探究盐与复配农药甲维盐·毒死蜱的复合污染对菜地土壤中酶活性与微生物数量的影响.结果表明:盐胁迫和甲维盐·毒死蜱分别作用下土壤中的脲酶、蔗糖酶、脱氢酶和过氧化氢酶活性均受到不同程度的抑制作用,且随着盐分水平和甲维盐·毒死蜱浓度的升高呈显著下降趋势;土壤细菌、真菌和放线菌数量亦随土壤盐分和甲维盐·毒死蜱浓度的增加而减少.随着时间的延长,农药在土壤中不断被降解而减少,对微生物的毒害性也就随着减弱,并最终恢复到与对照组相一致的水平.但是在与高盐复合胁迫时,土壤微生物数量与土壤酶活性始终处于被抑制状态,由此可以说明盐胁迫是抑制土壤微生物数量和酶活性的主导因素.
英文摘要:
      Soil microorganisms and enzyme activities are important indicators of soil ecosystem responses to environmental stresses. The impacts of salt and emamectin benzoate-chlorpyrifos mix on soil enzyme activities and microorganism population in a vegetable soil was examined using the orthogonal experimental design and pot culture. Results showed that the activities of soil urease, sucrase, dehydrogenase and catalase were inhibited in varying degrees by salt and emamectin benzoate-chlorpyrifos mix in a dose-effect mode. Similarly, the populations of soil bacteria, fungi, and actinomycetes decreased with increasing stresses. As time passed, the pesticide degraded gradually, thus reducing its toxicity and restoring the soil microbes to the control level. However, soil enzyme activities and microorganism quantities were inhibited all the time under co-existence of salt and pesticide. These results suggest that salt stress is the controlling factor of soil enzyme activity and microorganism inhibition by pesticides.
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