The underground root biomass and C storage in different forest ecosystems of Changbai Mountains in China
长白山不同生态系统地下部分生物量及地下C贮量的调查

Based on available information,this study deals with the fine root biomass in different forest ecosystem s along different altitudes and the total root biomass in some forest ecosystems.The correlation analysis is used between the natural conditions and the tree root biomass.From high altitude to low altitude(the sequence of forest ecosystem from high to low:betula ermanii forest,moss-betula ermanii dark-conifer forest,the transition belt of dark-conifer forest,moss-pi -nus koraiensis dark-conifer forest,and pinus koraiensis mixed broad-leaf tree forest),the fine root biomass is458.92gm -2 ,537.42gm -2 ,390.35gm -2 ,397.25gm -2 and660.21gm -2 ,respective-ly.The corresponding total root biomass is2578.00gm -2 ,2794.00gm -2 ,2680.00gm -2 ,3459.25gm -2 and5155.00gm -2 .The total root biomass is correlated with precipitation and active accumu-lated temperature along different altitude.But the fine root biomass is not correlated with these factors.The study also measures the carbon and nitrogen contents of the tree root and the soil in different forest ecosystems.At the same time,the study gathers the data about fallen wood and litterfall.On these basic,the study estimates the underground carbon storage in different forest e-cosystems along different altitudes.It is15493.88gm -2 ,21005.74gm -2 ,19819.24gm -2 ,14232.51gm -2 and7344.02gm -2 from high altitude to low altitude,respectively.