人促天然更新米槠次生林与杉木人工林乔木层碳贮量分配特征比较  

A Compared Study on Arbor Carbon Storage and its Distribution Characteristics of Castanopsis carlesii Forest and Cunninghamia lanceolata Plantation

作　　者：李丽红[1] 

机构地区：[1]福建农林大学莘口教学林场,福建三明365000

出　　处：《亚热带资源与环境学报》2012年第2期63-69,共7页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金重点项目(31130013)

摘　　要：以杉木人工林为对照,分析三明陈大人工促进天然更新形成的米槠次生林乔木层碳贮量及其随树种、径阶、高阶的分配特点.结果表明:米槠次生林乔木层物种丰富度高于杉木林,人促天然更新有利于保持乔木层的树种多样性.米槠次生林乔木层碳贮量为178.67 t.hm-2,高于杉木人工林(111.24 t.hm-2).米槠次生林和杉木人工林均以单优树种碳贮量占绝对优势,但米槠次生林中大个体林木(大径阶、大高阶)的碳贮量远大于杉木人工林.与杉木人工林相比,米槠次生林呈现出异龄的林分结构,这可能是其能够保持高碳吸存和高树种丰富度的重要原因.In contrast with Curminghamia lanceolata plantation （ CLP）, the arbor carbon storage of Castanopsis carlesii forest （CCF） by artificially promoted regeneration was estimated. The distribution of carbon storage among tree species, diameter class and high class was further analyzed. Results re-vealed that the tree species richness of CCF was higher than that of CLP, which indicated that artificial measures promoting regeneration would generally conserve the diversity of arbor layer tree species. Fo- cusing on the arbor carbon storage, the CCF preserved 178.67 t·hm^-2 carbon storage, while the CLP （ 111.24 t·hm^-2） remained distinctly lower than the former. The arbor layer accounts for the majori-ty of carbon storage in these two stands, specially, the CCF consists of more large-sized individuals. The stand structure of the CCF normally reflected the characteristics of uneven aged forest, which could be the reason for maintaining higher carbon sinks and high diversity.

关 键 词：人工促进天然更新 常绿阔叶林 杉木人工林 物种多样性 碳贮量 

分 类 号：S718[农业科学—林学]