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

论文在收集已有资料的基础上,补充调查了长白山自然保护区中沿不同海拔高度形成的不同森林生态系统的细根生物量和一些森林类型的根系总生物量,并且对自然环境因子对根系生物量的影响进行了相关分析。研究表明,由高海拔到低海拔(岳桦林、苔藓岳桦暗针叶林、暗针叶林过渡带、苔藓红松暗针叶林、红松针阔混交林)树木细根(<2mm)生物量分别是458.92gm^-2、537.42gm^-2、390.35gm^-2、397.25gm^-2和660.21gm^-2;根系总生物量分别是2578.00gm^-2、2794.00gm^-2、2680.00gm^-2、3459.25gm^-2和5155.00gm^-2。分别对细根生物量和根系总生物量与降水量和活动积温之间进行相关性分析时,发现细根生物量与不同海拔高度的活动积温和降水量没有明显的相关性;而根系生物量与这些因子存在着指数相关关系。该研究同时对不同海拔高度根系中的C、N含量和土壤中有机质的含量进行了分析和测定。结合已有的倒木和凋落物的资料,估算了长白山自然保护区中沿不同海拔高度形成的不同森林生态系统地下C的贮量。在长白山自然保护区内,由高海拔到低海拔,林地C贮量分别是15493.88gm^-2、21005.74gm^-2、19819.24gm^-2、14232.51gm^-2和7344.02gm^-2。

The underground root biomass and C storage in different forest ecosystems of Changbai Mountains in China

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.