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An Approach to Estimating Respiration of Forest Community and Its Application

FANG Jing-Yun(Department of Urban & Environmental Science,Peking University, Beijing 100871)(Research Center for Eco-Environmental Science,The Chinese Academy of Sciences, Beijing 100085)  
A method for estimating forest community respiration based on the morphological feature of thetrees and structural characteristics of forest was described. The method mainly involved four procedures, viz.establishment of 1) an appropriate relationship between the diameter class and the lengths, i. e. an equation toaccess the diameter distribution function, of woody organs; 2) a quantitative relationship between the respiration rate and the diameter of woody organs; 3) a model with biological significance for estimating the forest resPiration; 4) equations for estimating the forest community respiration. The method has been used to estimatecommunity respiration of be temperate forest types in the mountain of Beijing, Pinus tabulaeformis Carr.,Betula platyphylla Suk., and Quercus liaotungensis Koidz. forest. The mean respiration rates of these three forest types were between 1 256 and 1 491 mg CO2 (tree h) -1, showing no clear difference among them.Their annual community respiration rate was estimated to be 15. 5, 8 .0 and 4.9 tones dry weight (hm2 a) -1,respetively, indicating close values to most temperate foests which have been reported around the world.
【Fund】: 国家"八五"科技攻关课题;;国家杰出青年科学基金
【CateGory Index】: S718.5
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