三唑磷的土壤微生物生态效应研究  

Ecological Effect of Triazophos on Soil Microbe

作　　者：邹小明[1] 朱立成[1] 肖春玲[1] 王能强[2] 曾建忠[1] 

机构地区：[1]江西省生态环境与资源重点实验室 井冈山大学,江西吉安343009 [2]湖南科技大学生命科学学院,湖南湘潭411201

出　　处：《农业环境科学学报》2008年第1期238-242,共5页Journal of Agro-Environment Science

基　　金：国家自然科学基金(30660038);江西省教育厅科技项目(赣教技字[2007]322);吉安市2007年重点科技指导项目;井冈山大学2007年度自然科学基金项目(JZ0723)

摘　　要：在实验室控制条件下,研究了三唑磷浓度分别为0、10、50、100、200mg·kg-1时对土壤微生物数量、土壤基础呼吸及土壤酶活性的影响。结果表明,三唑磷对细菌、真菌及放线菌在培养初期均有不同程度的抑制作用,且抑制效应的持续时间与浓度均呈极显著正相关,对土壤基础呼吸表现出微弱抑制作用;100、200mg·kg-1浓度的三唑磷对土壤中的细菌先抑制后促进,对土壤中的真菌一直具有抑制效应,对土壤中的脲酶及过氧化氢酶活性都有先抑制后激活再恢复的作用,而低浓度三唑磷对这几种酶活性影响不大。Triazophos is an insecticide used on fruit trees, leaf vegetables, cotton and other horticultural crops to control sucking insects. Influence of triazophos on soil microorganism, respiration and enzyme activities were studied by traditional microbial cultivation and titration means under the laboratory control condition. Triazophos was added to soil at dosages of 0, 10, 50, 100, 200 mg·kg^-1, respectively. The results showed that the triazophos decreased the quantity of bacteria, fungi and actinomyces in the first cultivation stage. The duration of inhibition effect had a significant positive correlation with triazophos concentrations （P〈 0.01）. It was found that the soil respiration was slightly inhibited by triazophos, which had a negative correlation with triazophos concentrations （P〈0.05）. At the concentration of 100, 200 mg·kg^-1 triazophos, the numbers of soil bacteria reduced and then rose again. In the same condition, the activities of urease and catalase in soil were all inhibited first, then were stimulated and recovered. However, the low concentrations of triazophos （〈100 mg·kg^-1） had little effect on soil enzymes.

关 键 词：三唑磷 土壤微生物 土壤呼吸 土壤酶 

分 类 号：X592[环境科学与工程—环境工程]