摘要
2001~2002年利用大型径流场在太湖地区乌栅土上研究常规施肥条件下稻田径流磷排放情况。结果表明:稻季径流磷主要为颗粒磷,比例为50.1%~98.8%,溶解磷比例较低;磷素径流排放主要发生在水稻生育前期,稻季后期排放量较少;2001、2002年稻季径流输出总磷量分别为0.97、0.24 kg.hm-2,均低于同期降雨和灌溉输入总量,用磷浓度较高的水体灌溉稻田可能是减少周围水体磷总量的有效方法。研究该地区水体富营养化时不可忽视降雨输入磷。
The phosphorus loss via runoff from paddy field in Wushan soil,Taihu Region was studied with large catchment area.Phosphorus in the wet deposition and irrigation was monitored simultaneously.Results showed that the proportions of particle phosphorus(PP) to total phosphorus(TP) in runoff were 50.1%-98.8%,while the proportions of DP(dissolved phosphorus) was very low.Most of the runoff phosphorus discharge was occurred at the seedling and tillering stage.The amount of runoff phosphorus discharge during the wh...
出处
《扬州大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2007年第4期71-74,共4页
Journal of Yangzhou University：Agricultural and Life Science Edition
基金
国家重点基础研究计划项目(G1999011806)
中国科学院南京土壤研究所土壤圈物质循环开放课题(025103)
关键词
稻田
径流
磷素
径流场
paddy field
runoff
phosphorus
catchment area
