生态学杂志2017，Vol.36Issue(9)：2423-2430,8.DOI:10.13292/j.1000-4890.201709.016
沙质草地生长季生态系统碳净交换量特征及土壤呼吸贡献率
The characteristics of net ecosystem carbon exchange and the contribution of soil respiration during the growing season in sandy grassland
摘要
Abstract
Based on the eddy covariance system and LI-8150 automatic soil respiration observation system,this present study investigated the characteristics of net ecosystem CO2 exchange (NEE),the contribution of soil respiration (Rs) to ecosystem respiration (Reco),and the gross primary productivity (GPP) in Horqin sandy grassland of China.The results showed that the average monthly diurnal variations of NEE changed apparently with a single peak curve;the highest absorption rate (-5.62 μmol · m-2 · s-1) and the highest release rate (3.14 μmol · m-2 · s-1)were observed in July.The sandy grassland ecosystem was a carbon sink,with a sequestration amount of 25.85 g C · m-2 during the growing season.The contribution of Rs to Reco accounted for 78.39％;the GPP was 275.51 g C · m-2 and the contribution of Reco to GPP accounted for 90.62％.关键词
沙质草地/碳通量/土壤呼吸/生态系统呼吸/总初级生产力Key words
sandy grassland/carbon flux/soil respiration/ecosystem respiration/gross primary productivity引用本文复制引用
牛亚毅,李玉强,龚相文,王旭洋,罗永清,张建鹏..沙质草地生长季生态系统碳净交换量特征及土壤呼吸贡献率[J].生态学杂志,2017,36(9):2423-2430,8.基金项目
中国科学院百人计划项目(Y551821)、国家自然科学基金项目(31640012,31560161)和国家重点研发计划(2016YFC0500901)项目资助. （Y551821）
