The carbon accumulation and dissipation features of sub—alpine woodland in Mt.Gongga

编号 zgly0000313719

文献类型 期刊论文

文献题名 The carbon accumulation and dissipation features of sub—alpine woodland in Mt.Gongga

学科分类 220.1040;森林土壤学

作者 CHENGGenwei 

作者单位 InstituteofMountainHazardsandEnvironment  CAS  Chengdu610041  China 

母体文献 Journal of Geographical Sciences;地理学报: 英文版 

年卷期 2003,13(1)

页码 13-18

年份 2003 

分类号 S153.6 

关键词 土壤  生物调查  呼吸作用  植物  光合作用  碳平衡  林地  大气 

文摘内容 Based on biomass investigations,soil respiration and plant photosynthesis measurement of dominant trees in Hailuogou valley of Mt.Gongga,Southwest China,the carbon(C) storage,absorption and release for several typical woodlands in sub-alpine zones have been discussed.For Abies fahri forest of 3,000 m above sea level,the Cstorage amount is 177.4t/ha for above-ground biomass and 143.2 t/ha for soil below-ground biomass. The annual gross C fixed by vegetation photosynthesis is 20-24 t/ha. The C release by canopy respiration is 3.0-5.5 t/ha for arbors and 10-19 t/ha for surface soil and roots.The annual net C fixed of forest ecosystem is about 6.0-7.1 t/ha.At lower elevations,the amount of C released by woodlands is higher than that of woods at higher elevations.The C fixed capacity of renewed forest with middle-aged trees is higher than that of mature forest.Before becoming over-matured forest,woodland is an important sink of C whereas bareland in woods is the source of atmospheric C。