The carbon accumulation and dissipation features of sub-alpine woodland in ***
The carbon accumulation and dissipation features of sub-alpine woodland in ***作者机构：Institute of Mountain Hazards and Environment CAS Chengdu 610041
出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)
年 卷 期：2003年第13卷第1期
页 面：13-18页
核心收录：
基 金：The National Natural Science Foundation of China, G1998040800 The Key Project for Basic Research on the Tibetan Plateau of CAS, No.KZ951-A1-204 No.KZ95T-06
主 题：Mt. Gongga forest community C balance
摘 要：Based on biomass investigations, soil respiration an d plant photosynthesis measurement of dominant trees in Hailuogou valley o f Mt. Gongga, Southwest China, the carbon (C) storage, absorption and release for several typical woodlands in sub-alpine zones have been di scussed. For Abies fabri forest of 3,000 m above sea level, the C stor age amount is 177.4 t/ha for above-ground biomass and 143.2 t/ha for s oil below-ground biomass. The annual gross C fixed by vegetation photo synthesis 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 f ixed of forest ecosystem is about 6.0-7.1 t/ha. At lower elevations, t he amount of C released by woodlands is higher than that of woods a t higher elevations. The C fixed capacity of renewed forest with middle-aged t rees 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.
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