水土保持学报2012，Vol.26Issue(3)：123-126,4.
亚热带小流域土壤氮磷分布及其环境效应
Distribution of Soil Nitrogen, Phosphorus and Its Environmental Effects in a Small Subtropical Watershed
摘要
Abstract
Accumulation of nitrogen and phosphorus is the main reason of agricultural non-point source pollution.To explore the distribution of nitrogen and phosphorus content and its impact on the environment,this study chose a small watershed of Jinjing town,Changsha county as the research area.There were 1 118 surface soil samples（0-20 cm） collected by different land use patterns to analysis the distribution of soil total nitrogen,total phosphorus and its environmental effects.The results showed that： The average contents of soil total nitrogen and total phosphorus were 1.66,0.54 g/kg,respectively,whereas the variation coefficients were 34.9% and 46.3%,both belonging to the medium variation.The contents of vegetable soil total nitrogen mainly distributed in 1.8~2.4 g/kg range,arid land and paddy fields were 1.2~1.8 g/kg,forest and tea plantations were 0.6~1.2 g/kg;the contents of vegetable soil total phosphorus mainly distributed in greater than 1.0 g/kg range,arid land was 0.6~0.8 g/kg,paddy fields was 0.4~0.6 g/kg,forest and tea plantations were 0.2~0.4 g/kg.Combining with the analysis of groundwater nitrogen and phosphorus content,it indicated that soil nitrogen content had relationship with the increase of groundwater ammonium nitrogen content,and impacted the quality of groundwater.Among which,paddy fields was particularly prominent.Leaching of soil phosphorus may have seasonal variations,which need to be further verified.关键词
土壤全氮/土壤全磷/环境效应/地下水/亚热带小流域Key words
soil total nitrogen/soil total phosphorus/environmental effects/groundwater/small subtropical watershed分类
农业科技引用本文复制引用
金慧龙,李裕元,高茹,刘新亮,吴金水..亚热带小流域土壤氮磷分布及其环境效应[J].水土保持学报,2012,26(3):123-126,4.基金项目
中国科学院知识创新工程重要项目 （）
中国科学院创新团队项目 （）
国家自然科学基金项目 （）
