基于LULUCF温室气体清单编制的浙江省杉木林生物量换算因子

以杉木林为研究对象,在12个县市选取浙江省2009年CFI体系的95个杉木林样地,根据样地平均木,在样地外围相似地段确定解析木共计95株,联立树高曲线方程和生物量模型,同时使用已公开发表的20个杉木生物量模型进行估算,由单株累加获得CFI系统样地的生物量,计算样地生物量与蓄积之比即BEF,建立BEF与林分蓄积之间的关系。根据2009年浙江省CFI体系数据,推算全省杉木林BEF为0.7453 t/m³,杉木林总生物量为3721.54万t,不确定性为5.739%;使用IPCC(1996)的碳密度缺省值(0.50)计,生长1 m³杉木吸收CO₂ 1.3663 t。

Research on biomass expansion factor of chinese fir forest in Zhejiang Province based on LULUCF greenhouse gas Inventory

Taking Chinese fir (Cunninghamia lanceolata (Lamb. Hook.)) forest as the subjects of this study, 95 sample plots were selected from 12 counties in CFI system (2009) of Zhejiang province. According to the average trees of 95 plots, 95 analytic trees were selected outside the sample plots but similar with them, and simultaneous equations of DBH-H equation and biomass model were established. Then, we compared the estimation outputs of 20 biomass models, calculated the ratio of stand biomass and stand volume which is exactly BEF, established the relationship between stand stock and BEF. According to Zhejiang CFI system 2009 (eighth), we calculated Chinese fir forest BEF in Zhejiang province is 0.7453 t/m³, and Chinese fir forest total biomass is 37.2154 million tons, uncertainty for 5.739%. Finally, based on IPCC(1996) carbon density default value (0.50), 1 m³ growth of Chinese fir forest absorbs CO₂ 1.3663 t.