草业学报2013，Vol.22Issue(4)：18-26,9.DOI:10.11686/cyxb20130402
疏勒河上游高寒草甸生态系统CO2通量观测研究
Observations and study on the CO2 flux in an alpine meadow ecosystem in the upper reaches of the Shule River Basin
摘要
Abstract
An eddy covariance observation system was established for providing continuous measurements on CO2 fluxes in an alpine meadow ecological system at the upper reach of the Shule River Basin from 2009 to 2011.Obvious seasonal and inter-annual variations of CO2 flux were observed.The months,June,July and August,were the strongest absorption period for CO2 while April,May and October were the strongest release period for CO2.The net exchange of CO2 in the three years was 134.5,151.3 and 194.4 g CO2/m2,respectively,and the mean value was 160.0 g CO2/m2.This indicates that the alpine meadow system played an important role as a carbon sink.During the growing season,the correlations between CO2 net exchange and the temperature,precipitation,relative humidity,and surface long wave radiation were all negative.When the temperature was higher than 7℃,the CO2 net exchange increased as temperature increased.In the dormant season,the correlations between CO2 net exchange and the temperature,precipitation,relative humidity,and surface long wave radiation were all positive.When the surface reflectivity was about 0.2,the trend of the CO2 net exchange increased fast.When the surface reflectivity was more than 0.3,the CO2 net exchange reached a maximum and then remained stable.关键词
涡动相关/高寒草甸/气象因子/疏勒河上游Key words
eddy covariance/ alpine meadow/ meteorological factor/ the upper reach of Shule River分类
农业科技引用本文复制引用
吴灏,叶柏生,吴锦奎,李曼,秦甲,王晓云,王杰..疏勒河上游高寒草甸生态系统CO2通量观测研究[J].草业学报,2013,22(4):18-26,9.基金项目
国家重大科学研究计划(2013CBA01806),国家科技支撑计划课题(2013BAB05B03),甘肃省自然科学基金(1107RJZA1711)和国家自然科学基金(41271079)资助. （2013CBA01806）
