Ge Li-Wen, Pan Gang, Ren De-Zhi, Du Yu-Jie, Zheng Xiang-Lei
Tibet Agricultural and Animal Husbandry College, Linzhi 860000, Tibet, China.
Ying Yong Sheng Tai Xue Bao. 2013 Feb;24(2):319-25.
According to the 6th Second Class Forest Resource Inventory data in Linzhi area of Tibet, and by using the volume source biomass method and average-biomass computing method, in combining with the molecular formula carbon rate of different tree species, this paper estimated the carbon storage and carbon density of different standing forests and their components in the area, and analyzed the spatial distribution patterns of the carbon storage and carbon density. In 2004, the forest carbon storage in the area was 2. 43x10(8) t, and the average forest carbon density was 76.01 t.hm-2. The carbon storage followed the sequence of standing forest > shrub forest > open forest > scattered trees > bamboo forest > four-side trees. Standing forests had a carbon storage 2.51x10(5)-1.27x10(8) t, accounting for 92.0% of the total forest carbon storage in the area. The average carbon density of various standing forests was 103.16 t.hm-2, and fir forest had the highest carbon storage and carbon density. From the view of regional distribution, the forest carbon storage presented a trend of increased from northwest to southeast, whereas the forest carbon density tended to be increased from southwest to northeast. The carbon storage of the standing forests was mainly consisted by mature and over-matured forests, and the carbon density of over-matured forests was the highest among all the age classes' forests. The forest carbon storage in Linzhi area would be increased with the increase of over-matured forests, but tended to be decreased with the death and decomposition of over-matured forests.
根据西藏林芝地区第六次森林资源二类调查数据，运用蓄积量源生物量法和平均生物量计算方法，并结合不同树种的分子式含碳率，估算了该地区不同林分及其组分的碳储量和碳密度，分析了碳储量和碳密度的空间分布格局。2004年，该地区森林碳储量为2.43×10⁸t，平均森林碳密度为76.01t·hm⁻²。碳储量排序为：林分＞灌木林＞疏林＞散生木＞竹林＞四旁树。林分碳储量为2.51×10⁵ - 1.27×10⁸t，占该地区森林总碳储量的92.0%。各林分平均碳密度为103.16t·hm⁻²，其中冷杉林碳储量和碳密度最高。从区域分布来看，森林碳储量呈西北向东南增加的趋势，而森林碳密度呈西南向东北增加的趋势。林分碳储量主要由成熟林和过熟林构成，过熟林碳密度在各龄级林中最高。随着过熟林的增加，林芝地区森林碳储量将增加，但随着过熟林的死亡和分解，碳储量将趋于减少。
