摘要
微生物生物量碳、微生物生物量氮和土壤矿化氮是３个重要的表征土壤质量的生物学指标，本文通过实验室培养研究了３种磺酰脲类除草剂（氯磺隆、甲磺隆、苄嘧磺隆）对上述生物学指标的动态影响．研究结果表明，用量为１ｍｇ／ｋｇ的３种磺酰脲类除草剂均明显降低了微生物生物量和氮的矿化量，尤其是施用后最初１０ｄ降低幅度比较显著．此后随着时间的增加，除草剂的抑制效应逐步减小．氯磺隆对这些土壤生物学指标的影响明显大于甲磺隆和苄嘧磺隆．
The most important biological indicators characterizing the soil quality are soil microbial biomass carbon (Cmic), microbial biomass nitrogen (Nmic) and mineralized nitrogen (Nmin). The dynamic effect with time of three sulfonylurea herbicides (chlorsulfuron, metsulfuron-methyl and bensulfuron-methyl) on these biological indicators was studied through laboratory incubation experiment. Results showed that Cmic, Nmic and Nmin were decreased significantly as the soil treated with three herbicides at a level of 1 mg/kg soil, especially within the initial 10 days after application. Therefore, this effect decreased with the time. Chlorsulfuron was found to have much greater effect on these soil biological indicators than metsulfuron-methyl and bensulfuron-methyl.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2000年第6期491-494,共4页
China Environmental Science
基金
国家重点基础研究发展规划资助项目(G1999011809)
教育部资助优秀年轻教师基金
浙江省自然科学基金(RC99032、498014)
关键词
磺酰脲类除草剂
微生物生物量碳
微生物生物量氮
矿化氮
sulfonylurea herbicides
microbial biomass carbon
microbial biomass nitrogen
nitrogen mineralization
