休宁县主要树种生物量及碳储量分析

以2009年休宁县森林资源二类调查数据为基础,运用基于生物量和蓄积量之间关系的生物量转换因子连续函数法,对休宁县的主要树种生物量、碳储量和碳汇价值进行了估计。结果表明:休宁县林分主要树种为杉木、栎类、马尾松、槠类和枫香,其中杉木林分面积占林分总面积的56.0%,占优势地位。中幼林面积占林分总面积的71.0%,成过熟林面积占林分总面积的29.0%。主要树种生物量为476.92万t,碳储量为238.46万t,碳汇价值为1.5亿元人民币。林分单位面积生物量为45.30 t.hm-2,平均碳密度为22.65 t.hm-2。林分单位面积生物量和碳密度都低于全国平均水平。因此,休宁县具有很大的碳汇潜力。

Forest biomass and forest carbon storage analysis for the main tree species in Xiuning county

Based on the data from forest resource inventory of Xiuning in 2009,the forest biomass,the car-bon storage and the value of carbon sinks of Xiuning were estimated with the variable biomass expansion factor function that is derived from the relationship between biomass and volume.The results showed that the main spe-cies of Xiuning is Cunninghamia lanceolata,Pinus massoniana,Quercus spp,Castanopsis spp and Liquidambar formosana.Among them,Cunninghamia lanceolata stand area accounted for 56.0% of the total area of dominant position,and the middle age and the young forest stand area accounted for 71.0% of the total area.The mature and the over-mature forest stand area accounted for 29.0% of the total area.The biomass of the main tree in Xiuning was 4 769.17×103 t;the carbon storage was 2 384.59×103 t;the value of carbon sinks was 150 million yuan;and the average biomass is 45.30 t? hm-2.The average carbon density is 22.65 t?hm-2;the average forest biomass of Xiuning and the average carbon density were lower than that of the national level.Therefore,the potential carbon sink of forest in Xiuning is great.