林分各器官生物量随林龄的变化规律——以杉木、马尾松人工林为例  

Age Effects on Stand Biomass Allocations to Different Components: a Case Study in Forests of Cunninghamia Lanceolata and Pinus Massoniana

作　　者：张林[1] 黄永 罗天祥[1,3] 戴强 邓坤枚[1] 

机构地区：[1]中国科学院地理科学与资源研究所 [2]广西林业勘测设计院 [3]中国科学院青藏高原研究所,北京100085 [4]广西国营黄冕林场

出　　处：《中国科学院研究生院学报》2005年第2期170-178,共9页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：中国科学院地理科学与资源研究所知识创新项目 (CX10G E0 1 0 2 0 3 );中国科学院院长青年基金特别支持项目 (2 0 0 2年 );国家自然科学基金 (3 0 3 70 2 90 );美国林务局全球变化研究项目(USDAForestService ;0 3 IC 112 42 3 43 0 69)资助

摘　　要：基于中国文献资料的 89块生物量样地以及在桂中的 6块不同龄级样地实测数据 ,对南方人工林的代表树种———杉木、马尾松林分及各器官生物量随林龄的变化规律进行了探讨 .分析结果表明 ,杉木、马尾松林分树干、地上生物量及林分总生物量均随林龄的增加而显著增加 ,枝条、根系生物量在马尾松林分中也随林龄显著增加 ,但在杉木林中则随林龄的增加逐渐趋向稳定 ,2种林分叶生物量与林龄的关系不密切 .林分生物量的根冠比在杉木林中随林龄增加而逐渐降低并趋于稳定 ;在马尾松林中二者关系不密切 .Forest biomass usually increases with stand age. However, biomass allo cations to different components of trees vary greatly with stand age. In this pa per, we synthesized and analyzed age effects on stand biomass allocations to dif ferent components in Chinese-fir and pine forests, the most important and widel y distributed plantations over south China. 95 field plots of biomass measurement s with different components and stand ages were from our field data in the Huang mian Forestry Center of Guangxi, and from Chinese literature during 1978～2003 T he results indicated that stem biomass, aboveground biomass and total biomass in both forest types increased significantly with stand age. Biomass of branches a nd roots also increased significantly with stand age in the pine forest. However , in Chinese-fir forest, the branch and root biomasses increased in early ages a nd then gradually tended to reach a steady state. There was no robust relationsh ip between leaf biomass and stand age in both forest types. The root-to-shoot ra tio decreased gradually with stand age in Chinese-fir forest, and there was no s ignificant correlation in the pine forest. Because forest inventory data have be come accepted as valuable contributions to carbon cycle research, we expected ou r in-depth analysis to provide insight into the methods for processing inventor y data for estimating carbon accumulation, which leads to more accurate estimates of forest carbon stocks and stock changes.

关 键 词：林龄 碳蓄积 生物量 杉木 马尾松 

分 类 号：S718[农业科学—林学]