农药学学报2016，Vol.18Issue(3)：330-336,7.DOI:10.16801/j.issn.1008-7303.2016.0045
不同氮肥用量下乙草胺对土壤氮转化过程的影响
Effects of acetochlor on transformation of urea nitrogen in soil at different nitrogen fertilizer application rates
摘要
Abstract
In order to assess the effects of acetochlor on transformation of urea nitrogen in soil at different nitrogen fertilizer application rates. An incubation experiment was conducted under laboratory conditions with 7 treatments including nitrogen (0, 75, 150 and 300 mg/kg), nitrogen (75, 150 and 300 mg/kg) plus acetochlor (10 mg/kg, active ingredient). The results showed that, acetochlor had no significantly effect on soil urea hydrolysis and nitrification at 75 mg/kg nitrogen concentration treatments. However, significant negative effect on soil urea hydrolysis was observed at 150 and 300 mg/kg nitrogen concentration treatments (P < 0.05). And, during a period of 24 h, the soil urea hydrolysis rate was decrease by 10.1% and 9.8% respectively. The urea fertilizer has no significant effect on the denitrification loss at 75 and 150 mg/kg concentration treatments. When the nitrogen concentration increased to 300 mg/kg, the total amount of denitrification loss increased to 13 221 μg/kg which was 117 times higher than the control treatment. The acetochlor has no significant effect on denitrification loss at 75 and 150 mg/kg nitrogen concentration treatments. However, significant negative effect was observed at the concentration of 300 mg/kg, which reduced the denitrification loss by 18.2% (P < 0.01). This study demonstrated that acetochlor markedly affected the nitrogen transformation in soil. However, under different nitrogen fertilizer application rates, different impacts on the processes of nitrogen transformation were detected.关键词
乙草胺/氮肥/土壤/氮转化Key words
acetochlor/nitrogen fertilizer/soil/nitrogen transformation分类
化学化工引用本文复制引用
郑祥洲,王亚萨,张玉树,张晶,陈静蕊,丁洪..不同氮肥用量下乙草胺对土壤氮转化过程的影响[J].农药学学报,2016,18(3):330-336,7.基金项目
国家自然科学基金项目(31270556，41401339)；福建省自然科学基金项目(2015J01111，2013J05058)；福建省公益类科研院所专项(2014R1022-2) （31270556，41401339）
