生态环境学报Issue(2)：255-262,8.DOI:10.16258/j.cnki.1674-5906.2015.02.012
太湖流域典型稻-麦轮作农田区氮素流失过程研究
Study on Nitrogen Loss in Rice-wheat Rotation Farmland in Taihu Basin
摘要
Abstract
Economic benefits of raising wheat is poor in Taihu Lake region where the economy highly developed. Meanwhile the nitrogen leaching loss is extremely high in rice-wheat rotation farmland. In order to reveal the process of nitrogen loss as well as to explain the nitrogen balance characteristics in rice-wheat rotation farmland in Taihu Basin, a field experiment was carried out using a runoff-plot method. Based on the monitoring data from 2007 to 2010, nitrogen balance characteristics and process of nitrogen loss were illustrated. The results indicate that the dry deposition of nitrogen was mainly found in winter and spring and performed a homogeneous distribution, whereas the wet deposition of total nitrogen and ammonium nitrogen were dominated by the precipitation amount .The amount of runoff is the driving factor of nitrogen runoff loss. The main form of nitrogen loss in surface runoff was soluble nitrogen including nitrate and ammonium nitrogen. Ammonium nitrogen is the main form in nitrogen leaching loss. In the rice growing period, ammonium nitrogen leakage loss account for 70%of total leakage loss. Nitrogen balance characteristics were also illustrated that 55.98%of nitrogen was take away by harvesting and denitrification loss, runoff loss and leakage loss of nitrogen were account for 25.10%, 11.49%and 3.11%, respectively. The results have positive significances to the farmland management and agricultural nonpoint source pollution control.关键词
稻-麦轮作/氮素/径流流失/渗漏流失Key words
rice-wheat rotation/Taihu Lake/nitrogen/leaching分类
资源环境引用本文复制引用
范宏翔,徐力刚,赵旭,胡岳峰..太湖流域典型稻-麦轮作农田区氮素流失过程研究[J].生态环境学报,2015,(2):255-262,8.基金项目
江苏省科技厅项目（BE2014739；BZ2014005）；国家自然科学基金项目（41371121）；中国科学院支持全国科学院联盟建设专项重大项目和江西省科技支撑项目 （）
