中文摘要：

利用第八次森林资源连续清查数据和不同树种的树干密度、含碳率等参数,运用生物量清单法,估算了西藏自治区森林乔木层植被碳储量和碳密度.结果表明：西藏森林生态系统乔木层植被总碳储量为1.067×10^9t,平均碳密度为72.49 t·hm^-2.不同林分乔木层碳储量依次为：乔木林〉散生木〉疏林〉四旁树.不同林种乔木层碳储量大小依次为：防护林〉特殊用途林〉用材林〉薪炭林,其中前两者所占比例为88.5%;不同林种乔木层平均碳密度为88.09t·hm^-2.不同林组乔木层碳储量与其分布面积排序一致,依次为：成熟林〉过熟林〉近熟林〉中龄林〉幼龄林.其中,成熟林乔木层碳储量占不同林组乔木层总碳储量的50%,并且不同林组乔木层碳储量随着林龄的增加呈先上升后下降的趋势.

英文摘要：

The estimation of vegetation carbon storage and density of forests at tree layer in Tibet Autonomous Region was calculated based on the eighth forest inventory data using the biomass inventory method,as well as other attributes like tree trunk density and carbon content of different species. The results showed that the total carbon storage at tree layer in Tibet forest ecosystem was 1.067×10^9t and the average carbon density was 72.49 t·hm^-2. The carbon storage at tree layer of different stands was in the order of arbor forest 〉scattered wood 〉sparse forest 〉alluvial tree. The carbon storage of different forest types at tree layer were in the order of shelterbelt〉 special-purpose forest 〉timber forest〉 firewood forest. The proportion of the first-mentioned two was 88.5%,and the average carbon density of different forest types at tree layer was 88.09 t·hm^-2. The carbon storage and its distribution area at tree layer in different forest groups were in the same order,followed by mature forest 〉over mature forest〉 near mature forest〉 middle aged forest〉 young forest. The carbon storage in mature forests accounted for 50% of the total carbon storage at tree layer in different forest groups. The carbon storage at tree layer in different forest groups increased first and then decreased with the increase of stand ages.