生态学杂志2012，Vol.31Issue(8)：2044-2049,6.
小流域内植被类型对土壤NO3/NH4+空间变化的影响
Effects of vegetation type on the spatial variation of soil NO3——N and NH4+-N concentrations in a small watershed
摘要
Abstract
As the key factors affecting the inorganic nitrogen sources and eutrophication of downstream aquatic system, the vegetation type and topographical feature in a watershed play an important role in soil nitrogen cycle. In this study, a comparison was made on the soil NO3--N and NH4 + -N concentrations in Changbai larch plantation, Chinese pine plantation, broad-leaved forest, and maize land in a small watershed, aimed to approach the relations between the vegetation types and the characteristics of soil inorganic nitrogen within the watershed. Our results showed that the soil NO3--N and NH4+-N concentrations varied significantly with the vegetation types (P<0.05). From down-slope to up-slope, the soil N03--N and NH4+-N concentrations decreased significantly from upper layer to lower layer, and the soil NO3--N concentration in maize land was the highest (11. 86 mg · kg-1 ) , with a higher risk of nitrogen leaching.关键词
小流域/土壤层次/坡位/硝态氮/铵态氮Key words
small watershed/ soil layers/ slope position/ NO3--N/ NH4+ -N.分类
农业科技引用本文复制引用
闫加亮,范志平,孙学凯,王琼,李胜男,王叶红..小流域内植被类型对土壤NO3/NH4+空间变化的影响[J].生态学杂志,2012,31(8):2044-2049,6.基金项目
“十二五”国家科技支撑计划项目(2011 BAD38 B0502)、“十二五”国家重大水专项(2012ZX07505-001)和辽宁石油化工大学人才创新团队计划项目资助. （2011 BAD38 B0502）
