两种密度马尾松人工林地上生物量模型及分配特征  

Above-ground Biomass Models and Biomass Allocation Characteristics of Pinus massoniana Plantations with Two Densities

作　　者：李玉凤 秦佳双[1,2,3] 梁燕 马姜明 颜培栋[4,5] 杨章旗 李明金 Li Yufeng;Qin Jiashuang;Liang Yan;Ma Jiangming;Yan Peidong;Yang Zhangqi;Li Mingjin(Institute for Sustainable Development and Innovation,Guangxi Normal University,Guilin,Guangxi 541006,China;Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection,Ministry of Education,Guilin,Guangxi 541006,China;Guangxi Institute of Botany,Chinese Academy of Sciences,Guilin,Guangxi 541006,China;Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning,Guangxi 530002,China;Guangxi Forestry Research Institute,Nanning,Guangxi 530002,China;Zhenlong Forest Farm,Hengxian,Guangxi 530327,China)

机构地区：[1]广西师范大学可持续发展创新研究院,广西桂林541006 [2]珍稀濒危动植物生态与环境保护教育部重点实验室,广西桂林541006 [3]广西壮族自治区中国科学院广西植物研究所,广西桂林541006 [4]广西优良用材林资源培育重点实验室,广西南宁530002 [5]广西壮族自治区林业科学研究院,广西南宁530002 [6]横县镇龙林场,广西横县530327

出　　处：《广西林业科学》2021年第4期378-385,共8页Guangxi Forestry Science

基　　金：广西创新驱动发展专项资金项目(桂科AA17204087-7);桂林市科学研究与技术开发计划项目(20190205);广西优良用材林资源培育重点实验室开放课题基金(2019-B-04-01);广西研究生教育创新计划项目(XYCSZ2019081)。

摘　　要：采用空间代替时间法、整株收获法和生物量模型估算法,对广西南亚热带两种密度(A:1156株/hm2和B:820株/hm2)的马尾松(Pinus massoniana)人工林地上生物量模型及生物量分配进行研究,为高碳汇马尾松人工林的密度选择提供依据。结果表明,W=a×D^(b)×H^(c)的各项评价指标及预测效果较好,可作为估算不同密度马尾松人工林灌木层叶、枝、干和整株地上部分生物量的最优模型。较高密度林分A的乔木层和群落的整株地上部分生物量高于较低密度林分B,林分B的灌木层和草本层生物量高于林分A。整株地上部分生物量均表现为乔木层>灌木层>草本层,乔木层和木本群落各器官生物量表现为干>枝>叶,林分A有利于乔木层及群落各器官生物量分配,林分B有利于灌木层(除枝外)及草本层生物量分配。林分A的马尾松各器官生物量均比林分B多;林分B的各器官生物量在乔木层及木本群落中的占比均高于林分A。林分A比林分B更能促进马尾松人工林的林分生物量及干生物量的分配,可提高林木出材率,提升林分质量及固碳能力。Above-ground biomass models and their distribution of Pinus massoniana plantations with two densi⁃ties(A:1156 plant/hm2 and B:820 plant/hm2)in south subtropical area of Guangxi were studied by methods of space instead of time,biomass harvesting method and biomass model estimation method,so as to provide basis for density selection of P.massoniana plantations with high carbon sink.Results showed that each evaluation index and estimation effect of W=a×D^(b)×H^(c)was better,which could be used to estimate biomass of different organs(leaf,branch,trunk and above-ground part)in shrub layer of P.massoniana plantations with different densities.Above⁃ground biomass of stand A was higher than that of stand B.Biomass of shrub layer and herb layer of stand B were both larger than those of stand A.Order of above⁃ground biomass was arbor layer>shrub layer>herb layer,and order of each organ biomass in tree layer and woody community was stem>branch>leaf.Stand A was beneficial to allocation of above⁃ground biomass of tree layer and each organ of community,and stand B was conducive to allocation of above⁃ground biomass of shrub layer(except branches)and herb lay⁃er.The biomass of each organ of P.massoniana in stand A were more than those in stand B.Proportion of bio⁃mass of each organ in arbor layer and woody community in stand B were higher than those in stand A.Com⁃pared with B,stand A could promote proportion of stand biomass and trunk biomass,further improve outturn percentage,and enhance stand quality and carbon fixation capacity.

关 键 词：地上部分生物量 分配特征 模型 马尾松 

分 类 号：S792.39[农业科学—林木遗传育种]