长白山阔叶次生林主要乔木地上碳储量分布

根据2007年吉林省汪清县境内东北部金沟岭林场的8个阔叶次生林标准地的调查数据,就其中7种主要乔木(DBH≥4cm)的地上碳储量及其伴随径级和树高等级的分布特征进行了研究。结果显示:1)地上碳储量大小排列为桦木(20 675.902 kg/hm2)>色木(7 065.584 kg/hm2)>椴树(4 740.284 kg/hm2)>山杨(3 777.076 kg/hm2)>水曲柳(3 440.81kg/hm2)>云冷杉(2 430.327kg/hm2)>红松(1 625.146kg/hm2)。2)在地上碳储量径阶分布方面,红松和云冷杉区别于阔叶树,碳储量曲线很平稳,在各径阶内碳储量没有较大变化。3)7种主要乔木地上碳储量随树高等级变化表现为单位面积的碳储量的分布沿高度级的增加而成倍增长,至一个峰值后,又随高度的增加而下降,整个变化趋势呈现一个近似正态的峰状曲线。5种阔叶树树干碳储量占总地上碳储量的比例随树高高度的增加而减少,而针叶树红松和云冷杉的树干碳储量比例随树高高度的增加而增加。

Above-ground Carbon Storage Allocations of Main Tree Species in Broad-leaved Natural Secondary Forest of Changbai Mountains

Based on the investigation data of 8 sampleplots of Jingouling station of Changbai mountains in 2007,the paper analyzed above-ground standing carbon storage of main tree species(DBH ≥4cm)and their distribution according to DBH(diameter at breast height) classes and layer height classes.The results are showed as following:(1) The amount of above-ground standing carbon storage of main tree species is in this sequence: Betula spp((20675.902)kg/hm~2)>Acer mono Maxim.((7065.584)kg/hm~2)>Tilia amurensis Rupr.((4740.284)kg/hm~2)>Populus davidiana((3777.076) kg/ hm~2)>Fraxinus mandshurica Rupr.((3440.810)kg/hm~2)>Picea asperata Mast.and Abies nephro-lepis((2430.327)kg/hm~2)>Pinus koraiensis Sieb.((1625.146)kg/ hm~2).(2) The carbon-storage curve of Pinus koraiensis Sieb.,Picea asperata Mast. and Abies nephrolepis were stabler than broadleaved tree species 's.(3) Carbon storage' distribution according to layer height class increased remarkably with height increasing,after that carbon storage decreased with height increasing in the tree level.Stem' carbon-storage percentage of above-ground carbon storage in broad leaved tree species deceased as the tree height classes increased,but Pinus koraiensis Sieb,,Picea asperata Mast.and Abies nephrolepis were on the contrary.