Study on biomass expansion factor for the major forest types in China
2003
Zhenhong Hou (Chinese Academy of Forestry wan Shou Shan Beijing (China). Inst. of Forest Ecology and Environment)
Biomass expansion factor (BEF, defined as the ratio of stand biomass to growing stock volume) is necessary for the calculation of biomass accumulation and losses, as some country specific data are likely to be restricted to volumes of stems or roundwood. Using the stand volume and biomass data of different forest types obtained from 480 literatures in recent decades, the authors calculated BEFs for 35 forest types in China, and analyzed their relationships with stand volume. Results indicated that it is feasible to estimate forest biomass through BEFs of different forest types in China. The mean values of BEF for these forest types ranged from 1,41 to 3.69. The mean BEFs of natural forests are larger than those of plantation. The BEF is larger for young stands but decreases with the increase of stand volume, too. When the stand volume is lower than 100 cu m/ha, the rate for BEF decreasing is very quick, but it turned to alleviate when stand volume is over 200 cu m/ha. Results are currently used by the ongoing initial national communication of China, and they may also provide useful information for establishing regional/continental or global default values off the BEFs such as the IPCC [Intergovernmental Panel on Climate Change] Emission Factor Database that was initiated early this year
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Este registro bibliográfico ha sido proporcionado por University of the Philippines at Los Baños