甲基对硫磷长期污染对土壤微生物的生态效应  

Ecological effects of long-term methylparathion contamination on soil microflora

作　　者：张瑞福[1] 崔中利[1] 何健[1] 黄婷婷[1] 李顺鹏[1] 

机构地区：[1]南京农业大学生命科学学院微生物学系/农业部农业环境微生物工程重点开放实验室,江苏南京210095

出　　处：《农村生态环境》2004年第4期48-50,共3页Rural Eco-Environment

基　　金："十五"国家科技攻关计划项目(2002BA516A01)

摘　　要：研究了有机磷农药甲基对硫磷长期污染对土壤微生物的影响,结果表明:污染土壤中细菌、放线菌、真菌数量变化不大,自生固氮菌和反硝化细菌数量减少,氨化细菌、亚硝化细菌、硝化细菌数量有所增加;与对照土壤相比,污染土壤呼吸作用下降29.93%,而氨化作用和硝化作用则增强。1g对照土壤(以干土计)中微生物总DNA提取量为(13.01±1.91)μg,污染土壤中则为(12.23±1.36)μg。Long-term effects of methylparathion contamination on soil microflora were investigated.Little difference in total counts of bacteria,actinomycetes and fungi was observed between the contaminated and the non-contaminated soil.Compared with the control,the contaminated soil was slightly lower in total count of azotobacters and denitrifying bacteria and significantly higher in those of ammonifying and ammonia-oxidizing and nitrifying bacteria.The respiratory intensity of the contaminated soil decreased by 29.93% while ammonification and nitrification increased significantly over that of control soil.The total DNA extracted from the contaminated soil and the control was (12.23±1.36)μg·g^(-1) and (13.01±(1.91))μg·g^(-1) dry soil,respectively.

关 键 词：甲基对硫磷 长期污染 土壤微生物 生态效应 

分 类 号：S154[农业科学—土壤学] X171[农业科学—农业基础科学]