水利学报2011，Vol.42Issue(7)：862-868,7.
节灌控排条件下氮磷迁移转化规律研究
Study on the moving and transforming law of N and P under water-saving irrigation and controlled drainage
摘要
Abstract
A series of field contrast experiments were conducted in rice area of south China.Based on these experiments,this paper investigates the displacement,N and P losses,and the moving and transforming law of N and P under different treatment of irrigation and drainage,which considers the synergistic effects of water-saving irrigation and controlled drainage as well as the uses of control variate method.The results show that under shallow-irrigation and deep-sluice model（G1）,the water discharge of controlled drainage（L1） decreases 7.59% compared with uncontrolled drainage（L2）.While under the shallow-wet irrigation（G2）,the displacement of L1 decreases 8.44% compared with L2.In the mean time,the losses of NO3--N,NH4＋-N,TN,TP on L1 decrease separately 34.08%,7.11%,11.31%,56.4% compared with（L2）.Therefore,controlled drainage is helpful to reduce the displacement and N and P losses.The irrigation and drainage combination of G1L1 is more conducive to control water displacement,reduce the losses of nitrogen and phosphorus.关键词
水稻灌区/灌排协同效应/排水量/氮磷流失量/迁移转化规律Key words
rice irrigated area/synergistic effects of irrigation and drainage/displacement/excretion of nitrogen and phosphorus/moving and transforming law分类
农业科技引用本文复制引用
乔欣,邵东国,刘欢欢,袁俊光..节灌控排条件下氮磷迁移转化规律研究[J].水利学报,2011,42(7):862-868,7.基金项目
教育部科学技术研究重大项目 （）
国家高技术研究发展计划（863计划） （）
“十一五”国家科技支撑计划 （）
国家自然科学基金项目 （）
