深圳大学学报（理工版）2011，Vol.28Issue(6)：541-547,7.
三峡库区紫色土坡耕地典型种植模式氮收支
Input-output budget of nitrogen under typical planting pattern in a purple soil sloping ploughland in the Three Gorges areas
摘要
Abstract
To characterize the input-output budget of nitrogen under typical planting pattern and to conduct the risk assessment of nitrogen loss in a purple soil sloping ploughland in the Three Gorges areas, the nitrogen budget under different planting pattern in this watershed was analyzed based on the data of 2009. Results show that the fertilizer N input, the N loss and the N surplus in dry-land are 1 372. 12 kg/(hm2 · a), 504. 29 kg/(hm2 -a) and 724. 94 kg/( hm2· a) , respectively, and the surplus rate is 49. 55%. The fertilizer N input, the N loss and the N surplus in orchards are 565. 56 kg/( hm2· a) , 182. 96 kg/( hm2 ·a) and 405. 42 kg/( hm2· a) , respectively, and the surplus rate in orchards is 64. 77 %. In paddy fields, the fertilizer N input, the N loss and the N surplus are 234.71 kg/(hm2 -a), 159.86 kg/(hm2 · a) and 47.78 kg/(hm2 -a), respectively, and the surplus rate is only 15.40 %. High environmental risk appeared in dry land and orchards. Excessive N fertilization and unreasonable fertilizer ratio resulted in the high risk of nitrogen loss in dry land and orchards.关键词
环境污染化学/三峡库区/紫色土/氮收支/种植模式/污染潜势/高强度开发/非点源污染/氮污染防治Key words
environmental pollution chemistry/ Three Gorges areas/ purple soil/ input-output budget of nitrogen/ planting pattern/ pollution potential/ high intensity exploitation/ nonpoint pollution/ pollution control of nitrogen分类
资源环境引用本文复制引用
刘京,郭劲松,方芳,陈猷鹏,李哲..三峡库区紫色土坡耕地典型种植模式氮收支[J].深圳大学学报（理工版）,2011,28(6):541-547,7.基金项目
国家水体污染与治理科技重大专项基金资助项目(2009ZX07104-003 （）
2009ZX07104-005)This work was supportd by the Nation Critical Patented Projects on Water Pollution Control and Management (2009ZX07104-003,2009ZX07104-005). （2009ZX07104-003,2009ZX07104-005）
