生态学杂志2012，Vol.31Issue(2)：446-452,7.
全球森林土壤N2O排放通量的影响因子
Factors affecting global forest soil N2O emission flux
摘要
Abstract
The role of forest ecosystem under global warming, especially the response of forest soil nitrogen ( N) pool to increased atmospheric N deposition, has become one of the hotspots in global change study. Through investigating and systematizing published data, this paper analyzed the distribution patterns of forest soil N2 0 emission fluxes from 38 in situ observations at global scale in 1984-2009, and assessed the response of forest soil annual cumulative N2O flux to atmospheric N deposition and to the variations in water and heat conditions. In global scale, forest soil N2O flux was averagely 0.47 kg N ? Hm-2 ? A-1, and declined gradually from low to high latitude. As a complex ecological process, forest soil cumulative N2O flux was also significantly affected by mean annual temperature, annual precipitation, and soil properties. The temperature sensitivity index of soil N2O flux ( Q10 value) in global forest ecosystem was about 1.5. Moreover, forest soil N2O flux increased significantly with increasing atmospheric N deposition. The atmospheric N deposition could explain 53% of the variations in the forest soil N2O flux across different regions, while the soil Ph, mean annual temperature, and atmospheric N deposition could explain 55% of the variations within regions.关键词
土壤N2O排放通量/森林生态系统/大气氮沉降/气候因子Key words
soil N2O emission flux/forest ecosystem/atmospheric nitrogen deposition/climate factor分类
生物科学引用本文复制引用
韩琳,王鸽,王伟,赵熙..全球森林土壤N2O排放通量的影响因子[J].生态学杂志,2012,31(2):446-452,7.基金项目
国家自然科学基金项目(41105101)、成都信息工程学院校引进人才启动基金项目(KYTZ201011)和中国气象局成都高原气象研究所开放实验室课题基会项目(LPM2009018和BROP201001)资助. （41105101）
