土壤环境因子对克氏针茅草地生态系统碳通量的影响  

The Effect of Soil Environmental Factors on the Carbon Flux over Stipa krylovii Ecosystem

作　　者：薛红喜 李琪[2] 黄瑜[3] 王云龙[2] 吴东丽[4] 

机构地区：[1]国家气象中心,北京100081 [2]南京信息工程大学环境科学与工程学院,江苏南京210044 [3]南京信息工程大学大气物理学院,江苏南京210044 [4]中国气象局气象探测中心,北京100081

出　　处：《地理科学》2014年第11期1385-1390,共6页Scientia Geographica Sinica

基　　金：干旱气象科学研究基金项目(编号:IAM200919)资助

摘　　要：利用涡度相关法对克氏针茅草地生态系统的生态系统初级生产力（GEP）、生态系统呼吸（RECO）和净生态系统碳交换（NEE）进行观测，探讨土壤环境因子对GEP、RECO、NEE的影响。结果表明：2009～2010年，克氏针茅草地生态系统GEP、RECO、NEE都呈现出了明显的峰值变化规律，2010年表现出了更强的固碳能力。土壤环境因子与克氏针茅草地生态系统GEP、RECO、NEE都有极显著的相关性，土壤温度对碳通量组分的影响程度要高于土壤水分；土壤环境因子对GEP、RECO的影响程度要高于对NEE的影响。Based on the eddy covariance technique, the variations of the gross ecosystem productivity （GEP）, the ecosystem respiration （RECO） and the net ecosystem carbon exchange （NEE） over Stipa krylovii ecosys- tem were measured in 2009-2010, and the impaction of the soil environmental factors on the GEP, RECO and NEE. The resuRs showed that the GEP, RECO and NEE over the Stipa krylovii ecosystem showed obvious peak change rule in 2009-2010, and the Stipa krylovii ecosystem had the stronger ability of carbon fixation in 2010. There had very significant relationship between the soil environmental factors and the GEP, RECO and NEE over the Stipa krylovii ecosystem. The soil temperature had more profound influence on the carbon flux components of the Stipa krylovii ecosystem than the soil moisture did, and the soil environmental factors had more profound influence on the GEP and RECO than on the NEE.

关 键 词：土壤环境因子 碳通量 涡度相关 克氏针茅 生态系统 

分 类 号：S812[农业科学—草业科学] S181[农业科学—畜牧学]