乔木林碳贮量研究--以旌德县为例

利用旌德县第8次森林资源二类调查数据，采取建立数学模型的方法分析了该县的乔木林总量及其年龄结构，依据建立的不同森林类型生物量和蓄积量之间的回归方程，估算了全县乔木林的碳储量及碳密度。结果表明：（1）旌德县乔木林总面积50190.7 hm2，乔木林总蓄积3624337 m3，以庙首镇森林面积最大。（2）乔木树种以杉类、硬阔和松类的面积和蓄积最大，乔木林的年龄结构较为合理；（3）乔木林生物量为118.18万t，乔木林碳储量为591485.20 t，碳密度为11.78 t/hm2，不同森林类型碳密度差异很大，以柏类的碳密度最大，达到27.63 t/hm2，软阔、硬阔林的碳密度较小，仅为0.73 t/hm2.和0.17 t/hm2.。因此，在实施各重点造林工程的同时加强中幼林抚育管理，提升现有林质量，促进林木生长，有效增加单位面积蓄积量，将会使旌德县森林的碳汇能力进一步提高。

Study on the Carbon Storage of Arbor Forests---A Case Study of Jingde County

In this paper the gross and age structure of arbor forests in Jingde County were analyzed using the data of the 8th Class II Forest Resources Survey in Jingde County and the established mathematical model, and the carbon storage and carbon density of arbor forests in the whole county were estimated with the established regression equation between the biomass and volume of different forest types. The results are as follows： 1. The total area of arbor forests in Jingde County was 50 190.7 hm2 and the total volume of arbor forests was 3 624 337 m3 with Miaoshou Township having the largest forest area;2. Tree species in Taxodiaceaeand Pinaceae and hardwood broadleaved trees had the largest forest area and largest volume, and the forest age structure was appropriate;3. The biomass of arbor forests was 1 181 800 t with the carbon storage totaling 591 485.20 t and the carbon density being 11.78t/hm2,and the carbon density of different forest types varied widely with that of Cupressaceae forests being the biggest, reaching 27.63 t/hm2, and those of softwood and hardwood broadleaved forests being quite small, only 0.73 t/hm2 and 0.17t/hm2 respectively. Therefore, in the implementation of key forestation projects, tending management of young and middle-aged forests should be strengthened at the same time to improve the quality and growth of present forests and increase the per-unit-area volume which would further improve the carbon sequestration capacity of the forests in Jingde County.