南岭小坑天然次生林生态系统生物量的估算  

Estimation of biomass in natural secondary forest ecosystem of Xiaokeng, Nanling mountain of southern China

作　　者：黄志宏[1] 陈步峰[2] 周光益[2] 吴仲民[2] 王旭[2] 李根[2] 梁瑞友 

机构地区：[1]中南林业科技大学生命科学与技术学院,南方林业生态应用技术国家工程实验室,湖南长沙410004 [2]中国林业科学研究院热带林业研究所,广东广州510520 [3]韶关市曲江区国营小坑林场,广东曲江512162

出　　处：《中南林业科技大学学报》2013年第8期83-90,共8页Journal of Central South University of Forestry & Technology

基　　金：林业公益行业专项经费项目(200804006);广东省自然科学基金项目(8151200501000010);科技部国际合作项目(2007DFA31070);中南林业科技大学青年基金重点项目(2005009A)

摘　　要：粤北南岭是我国中亚热带生物多样性热点地区,森林覆盖率高,具有典型的中亚热带常绿阔叶林群落。本研究在进行样地测定的基础上,采用传统的样地收获法实测了小坑流域地带性植被天然次生林3块代表性样地(小红栲-木荷群落、藜蒴栲-小红栲群落、木荷-杉木群落)生物量,在此基础上,应用相对生长方程法估算了该生态系统生物量。结果表明:(1)群落是以藜蒴栲、小红栲与木荷为主要建群种,为地带性植被类型;杉木也占有重要地位,这与其中一个群落由杉木林皆伐转换而来有关;群落物种的重要值分布符合正态分布;(2)胸径与地上生物量的曲线拟合回归方程B(kg.tree-1)=0.128*D2.367 8可获得二者较高的相关性(p=0.000 1);树高与胸径关系符合H=3.712 0D0.474 6(p<0.000 1);(3)地上生物量的估算结果为119.720 Mg.hm-2,比实测值高2.59%;地下生物量的估算结果为23.922±4.201 Mg.hm-2,系统总生物量为143.642±8.896 Mg.hm-2。Subtropical evergreen broad-leaf forests were paid more attention for its higher biodiversity and potential in carbon sequenstration.While biomass of typical forest types in Nanling mountains in northern Guangdong province was poorly investigated.Allometric equations have been widely used to estimate biomass and carbon stock of forests.More accurate estimation of biomass is necessary for better studying carbon sequenstration in forest growth,especially,for the deforestation or reforestation areas.However,the higher accuracy in parameters estimation for allometric equations needs a larger numbers of samplings.Therefore,the allometric equations,combined with destructive samplings in the natural secondary forests of Xiaokeng,Nanling mountains of southern China,were employed to estimate biomass in the ecosystem.An extensive ground truth data base of natural secondary succession was constructed by using field survey and detailed inventory and harvest method carried out in selected plots.The following results show that（1） the dominant tree species were Castanopsis fissa,Castanopsis carlesii,Schima superba,which were all of the regional typical vegetation types,with an exception of Cunninghamia lanceolata being one of key species due to one of communities transformed from clear-cut plantation of C.lanceolata.And the distribution of important values of the species in the sampled community obeyed to normal distribution.（2） allometric equations are presented as： B（kg.tree-1） = 0.128＊D2.3678,based on the diameter at breast height and total aboveground biomass at significant level of p=0.000 1.At the same time,a power function of H=3.7120D0.4746（p0.000 1） was yielded for co-relationship of tree height（H） and mean DDBH.Both of them were cooperated into a more general allometric equation as B=0.19ρD2＋c to estimate aboveground biomass（BAGB） of the community.And（3） estimation of BAGB was about 119.720 Mg.hm-2,which was a little higher than the measured BAGBby 2.59%.The belowground biomass（BBG

关 键 词：天然次生林 地上生物量 地下生物量 相对生长方程 南岭 

分 类 号：S792[农业科学—林木遗传育种]