生态环境学报2012，Vol.21Issue(3)：551-554,4.
除草剂对尿素氮在土壤中转化的影响
Effects of herbicides on transformation of urea nitrogen in vegetable plantation soil
摘要
Abstract
To assess the effects of herbicides on transformation of urea nitrogen in vegetable plantation soil, an incubation experiment was conducted under laboratory condition with 4 treatments including control, urea, urea+glyphosate and urea+butachlor, w(N)=200 mg·kg-1 by dry soil and inactive ingredient)=10 mg·kg-1 by dry soil were applied in urea and herbicide treatments respectively. The experimental results showed that glyphosate and butachlor had no negative impact on ammonification of urea or improved the ammonification activity; retarded the nitrifying rates of soil in 2 days in the beginning, but accelerated the rates at the 4th day significantly (P<0.05); Glyphosate inhibited denitrification (P<0.05), but butachlor promoted one (P<0.01). The nitrogen loss amounts by denitrification occupied 16.90%. 6.34% and 3.66% of urea nitrogen applied in urea+butachlor, urea and urea+glyphosate treatments, respectively. In conclusion, herbicides markedly affected nitrogen transformation in soil, but different kind of herbicides appeared different impacts on processes of nitrogen transformation.关键词
草甘膦/丁草胺/尿素/氨化作用/硝化作用/反硝化作用Key words
glyphosate/ butachlor/ urea/ ammonification/ nitrification/ denitrification分类
农业科技引用本文复制引用
丁洪,郑祥洲,雷俊杰,张玉树,陈静蕊,李世清..除草剂对尿素氮在土壤中转化的影响[J].生态环境学报,2012,21(3):551-554,4.基金项目
黄土高原土壤侵蚀与旱地农业国家重点实验室开放基金课题(10501-291),福建省科技厅公益类科研院所专项(2009R10032-1 （10501-291）
2010R1024-2) （）
