咪唑乙烟酸对土壤微生物生态的影响  

Effect of Imazethapyr on Soil Microbial Ecology

作　　者：张昌朋[1] 刘新刚[1] 徐军[1] 董丰收[1] 盛宇[1,2] 田迎迎[1] 郑永权[1] 

机构地区：[1]中国农业科学院植物保护研究所农业部农药化学与应用重点开放实验室,北京100193 [2]东北农业大学农学院,哈尔滨150030

出　　处：《农药》2010年第2期117-119,130,共4页Agrochemicals

摘　　要：通过实验室培养研究了除草剂咪唑乙烟酸对土壤微生物生物量和群落结构的影响。结果表明:咪唑乙烟酸在土壤中的降解动态符合一级动力学方程,而且原药比制剂降解的更快,半衰期更短。除草剂咪唑乙烟酸显著增加了土壤微生物的生物量碳和总的磷脂脂肪酸(PLFA)含量,而且原药的增加作用更加显著。原药显著提高了土壤微生物的GN/GP值和压力指数(Stresslevel);原药和制剂显著降低了微生物的真菌/细菌值和多样性指数(Shannon指数)。除草剂咪唑乙烟酸显著影响了土壤微生物的群落结构,而且原药比制剂的影响更加显著。An incubation experiment was conducted to study the effects of imazethapyr on soil microbial biomass and microbial community structure. Imazethapyr degradation dynamics in soil accord with the kinetic equation. The half life of imazethapyr technical materials（TC） was smaller than that of imazethapyr aqueous solution（AS） in soil. Herbicide imazethapyr significantly increased soil microbial biomass carbon and total PLFAs, and the effects of imazethapyr TC were greater than that of imazethapyr AS. Imazethapyr TC significantly increased GN/GP and microbial stress level. Fungi/Bacteria and Shannon index decreased with imazethapyr TC and imazethapyr AS application. The effects of imazethapyr TC on soil microbial community structure were greater than that ofimazethapyr AS.

关 键 词：咪唑乙烟酸 土壤微生物 微生物生物量 微生物群落结构 

分 类 号：X592[环境科学与工程—环境工程]