%0 Journal Article
%T Estimation of N loss loading by runoff from paddy field during submersed period in Hangjiahu area<br>杭嘉湖地区淹水稻田氮素径流流失负荷估算
%A TIAN Ping
%A CHEN Yingxu
%A TIAN Guangming
%A LIANG Xinqiang
%A ZHANG Qiuling
%A YU Qiaogang
%A LI Hua
%A <br>田平
%A 陈英旭
%A 田光明
%A 梁新强
%A 张秋玲
%A 俞巧钢
%A 李华
%J 应用生态学报
%D 2006
%I 
%X As the largest bread basket in Zhejiang Province, Hangjiahu area is facing more and more serious water pollution, while the N loss loading by runoff from the paddy field during its submersed period is the main cause of the pollution. Through field experiment and fixed spot observation, the model of precipitation - runoff in Yangtze delta was testified, and the results showed that the precipitation - runoff model from HE Baogen was basically accorded with the fact after considering the impact of field overflow mouth, and the error was between - 19. 9% and + 18. 0%. The model of N concentration with precipitation - runoff in paddy field during submersed period was brought forward, with the R value being 0. 948. These two models consisted of the model of N loss loading by runoff from paddy field during submersed period. Based on this model as well as the past 30 years data of fertilization and precipitation, 1: 250,000 topography map, land use map, and water system map, the N loss loading and its distribution were estimated by using GIS method, and the results showed that the N loss loading was different from place to place, with an average of 35.26 kg N x hm(-2), and accounting for 12. 69% of the applied N. The N loss loading in Anji and Yuhang with obviously more precipitation was higher than that in other places, while Haining also had a serious N loss problem because of the huge amount of applied N.
%K Nitrogen loss
%K Runoff
%K Submersed paddy field
%K Hangjiahu area<br>氮素流失
%K 径流
%K 淹水稻田
%K 杭嘉湖地区
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=22BAEE3CB7213AAC&yid=37904DC365DD7266&vid=BCA2697F357F2001&iid=F3090AE9B60B7ED1&sid=23E2AE7BE4186237&eid=7D3E890216EEDC54&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=5&reference_num=19