农业环境科学学报2012，Vol.31Issue(5)：969-976,8.
闽西北烟-稻轮作系统地表氮、磷流失特征研究
Nitrogen and Phosphorus Losses from Surface Runoff in Tobacco-rice Rotation System in Northwest of Fujian Province, China
摘要
Abstract
To investigate the losses of nitrogen(N) and phosphorus(P) from surface runoff in the tobacco-rice rotation system in Fujian Province, a located field experiment was conducted to study the effect of different fertilization measures on the losses. The results indicated that the N & P losses mainly occurred in tobacco growing season, and the loss amounts were significantly correlated with the rainfall which conducted runoff. With conventional fertilization, the loss amounts of N and P were 4.71-14.86 kg·hm-2·a-1 and 0.93-2.20 kg·hm-2·a-1, whose loss coefficients were 0.76%~1.27% and 0.47%~1.7l%, respectively. Compared to conventional fertilization, the loss amounts in optimized fertilization treatment decreased 1.25%~13.82% for N and 8.82%~14.99% for P, whose loss coefficients were 0.76%~1.43% and 0.41 %~ 1.54%, respectively. And the N & P losses with the treatment that increasing 50% nitrogen and phosphorus fertilizer applied would bring about increase of 7.6%~37.6% and 21.5%-27.4% than that with optimized fertilization. Compared to optimized fertilization, the treatment that rice straw returning increased the N & P runoff losses of 6.4%~16.4% and-3.4%~14.0%, whose loss coefficients reached 0.86%~ 1.91% and 0.36%~2.00%, respectively. Based on the analysis results it was considered that the optimized fertilization could reduce N & P runoff losses amount, more application of N & P increased the losses, and the rice straw returning also increased the risk of N & P runoff losses.关键词
烟-稻轮作/氮流失/磷流失/流失系数Key words
tobacco-rice rotation system/ nitrogen loss/ phosphorus loss/ loss coefficient分类
资源环境引用本文复制引用
张玉树,丁洪,郑祥洲,陈静蕊..闽西北烟-稻轮作系统地表氮、磷流失特征研究[J].农业环境科学学报,2012,31(5):969-976,8.基金项目
农业部科技项目(WX-Z-07-08) （WX-Z-07-08）
公益性行业(农业)科研专项(201003014-6-1-2) （农业）
福建省公益类科研院所专项(2010R1024-2) （2010R1024-2）
福建省农业科学院创新团队重点科研项目 （）
