Nitrogen interception in floodwater of rice field in Taihu region of China  

作　　者：LIANG Xin-qiang CHEN Ying-xu LI Hua TIAN Guang-ming ZHANG Zhi-jian NI Wu-zhong HE Miao-miao 

机构地区：[1]Department of Environmental Engineering, College of Natural Resources and Environmental Science, Zhejiang University, Hangzhou 310029, China.

出　　处：《Journal of Environmental Sciences》2007年第12期1474-1481,共8页环境科学学报（英文版）

基　　金：Project supported by the National Basic Research Program (973) of China (No.2002CB410807);the Provincial Natural Science Foundation of Zhejiang(No.Y504247).

摘　　要：A field experiment located in Taihu Lake Basin of China was conducted, by application of urea or a mixture of urea with manure, to elucidate the interception of nitrogen （N） export in a typical rice field through ＂zero-drainage water management＂ combined with sound irrigation, rainfall forecasting and field drying. N concentrations in floodwater rapidly declined before the first event of field drying after three split fertilizations, and subsequently tended to rearm to the background level. Before the first field drying, total particulate nitrogen （TPN） was the predominant N form in floodwater of plots with no N input, dissolved inorganic nitrogen （DIN） on plots that received urea only, and dissolved organic nitrogen （DON） on plots treated with the mixture of urea and manure. Thereafter TPN became the major form. No N export was found from the rice field, but total nitrogen （TN） of 15.8 kg/hm^2 was remained, mainly due to soil N sorption. The results recommended the zero-drainage water management for full-scale areas for minimizing N export.A field experiment located in Taihu Lake Basin of China was conducted, by application of urea or a mixture of urea with manure, to elucidate the interception of nitrogen （N） export in a typical rice field through ＂zero-drainage water management＂ combined with sound irrigation, rainfall forecasting and field drying. N concentrations in floodwater rapidly declined before the first event of field drying after three split fertilizations, and subsequently tended to rearm to the background level. Before the first field drying, total particulate nitrogen （TPN） was the predominant N form in floodwater of plots with no N input, dissolved inorganic nitrogen （DIN） on plots that received urea only, and dissolved organic nitrogen （DON） on plots treated with the mixture of urea and manure. Thereafter TPN became the major form. No N export was found from the rice field, but total nitrogen （TN） of 15.8 kg/hm^2 was remained, mainly due to soil N sorption. The results recommended the zero-drainage water management for full-scale areas for minimizing N export.

关 键 词：NITROGEN paddy field surface floodwater INTERCEPTION Taihu region 

分 类 号：X52[环境科学与工程—环境工程]