莫尔道嘎林区森林碳储量及其变化

基于莫尔道嘎林区森林资源清查资料,依据不同森林类型生物量与蓄积量之间的线性关系,对莫尔道嘎林区不同时段、不同森林类型的森林碳储量进行了推算,并分析其动态变化特征。结果表明：莫尔道嘎林区森林活立木(地上和地下)总碳储量由2008年的18456147 t增加到了2012年的20202875 t,累计增加碳1746728 t,增长率为9.46％。从树种的角度分析,全区总碳储量中落叶松和白桦所占比重最大；从龄组角度看,中龄林和成熟林占总碳储量比重最高。同时,不同森林类型碳密度不同,其中,樟子松林碳密度最大,蒙古栎林碳密度最小；不同龄组的碳密度随着林龄的增加逐渐增大。不同森林类别之间(重点公益林、一般公益林和商品林)森林碳密度也不同,重点公益林碳密度明显高于一般公益林和商品林。

Forest carbon storage and its dynamics in Moerdaoga Forestry Region

Based on forest inventory data, forest carbon storage and its dynamics in Moerdaoga Forestry Region was estimated by linear equations between stand biomass and volume for different tree species. The results showed that total forest carbon storage in Moerdaoga Forestry Region increased from 18 456 147 tons in 2008 to 20 202 875 tons in 2012 with a growth rate of 9.46%. Larix gmelinii and Betula platyphylla played a dominant role. The middle-aged forests and mature forests accounted for a large proportion of total carbon storage, and the carbon densities of different forest types and ages showed an increasing trend. The forest carbon density of the key public welfare forest was higher than that of the general public welfare forest and commercial forest.