森林火灾对兴安落叶松林生态系统碳素分布及储量的影响

Effect of Forest Fire on Distribution and Storage of Carbon for Larix gmelini Forests

运用森林生态学典型样地法设立样地并获取野外数据,采用燃烧法测定森林、土壤中的碳,研究过火和未过火两种兴安落叶松林生态系统的碳素分布及储量,结果表明:火干扰后,杜香—兴安落叶松林碳储量减少33.8127t/hm2,草类—兴安落叶松林碳储量减少104.9247t/hm2,其中,森林植被部分的干、枝、叶和根的碳储量都减少,其它组分因林分类型而异;土壤碳储量明显减少,但各层的碳储量空间分布变化不一致。

Combustion method is used to determine the carbon storage in forest and soil with field data obtained by typical sample plot method based on forest ecology. The distribution and storage of carbon in two types of ecosystem of combusted and uncombusted Larix gmelini forests were studied. Results showed that the carbon storage of Ledum palustre var. dilatatum and L. dahurica forests decreased by 33.812 7 t/hm^2, and that of grass and Dahurica forests decreased by 104.924 7 t/hm^2 after forest fire, among which the carbon storages of stock, branch, leaf and root of forest vegetations all decreased, and the carbon storage of other components differed with forest stand types. The carbon storage of soil decreased obviously, but the change of spatial distribution of carbon storage is not accordant.