摘要
以广西南亚热带横县镇龙林场马尾松人工林幼龄林、中龄林、成熟林和过熟林为研究对象,探讨近自然恢复过程中,马尾松人工林各层次、器官(按叶、枝、干、整株地上部分计)生物量模型构建及其分配特征。结果表明:1)干和整株地上部分生物量估测效果较好,叶和枝次之,整体而言模型Ⅱ(W=a×Db×Hc)具有较高的拟合优度和较小的标准误差,模型检验精度均较高,可作为不同恢复阶段灌木层各器官生物量模型拟合的最优模型。2)随着近自然恢复的进行,马尾松人工林木本群落枝、干生物量以及群落整株地上部分生物量由大到小依次为过熟林、成熟林、中龄林、幼龄林,叶生物量由大到小依次为中龄林、过熟林、成熟林、幼龄林,各器官生物量在同一群落的不同林龄间均差异显著(P<0.05)。不同林龄木本群落叶生物量大小为(2.65±0.01)~(7.77±0.35)t/hm2,枝生物量大小为(4.24±0.00)~(24.49±0.11)t/hm2,干生物量大小为(24.32±0.01)~(236.51±1.22)t/hm2,不同林龄群落整株地上部分生物量大小为(42.73±0.67)~(268.03±1.25)t/hm2,其中树干占主导地位。各林龄马尾松林内,各层次地上生物量由高到低依次为乔木层、灌木层、草本层,其中乔木层为马尾松林地上生物量的主体。3)随着近自然恢复的进行,马尾松种群整株地上部分生物量由大到小依次为过熟林、成熟林、中龄林、幼龄林,在群落中占比呈先增大后减小的趋势,马尾松种群叶、枝、干生物量在不同恢复阶段木本群落生物量中占比均呈下降趋势。该结果为近自然恢复过程中马尾松人工林的群落结构动态变化提供了科学依据,有助于提高林分生产力和碳汇能力。
In order to study the biomass model construction and distribution characteristics of different layers and organs(by leaf,branch,trunk and above-ground)of Pinus massoniana plantations in the near natural recovery process.Young stand,middle-aged stand,mature stand and over mature stand of P.massoniana plantations in Zhenlong forest farm of Hengxian county in southern subtropical area of Guangxi were selected as the research subjects.The results showed that:1)The trunk and above-ground biomass estimation results were better,followed by leaves and branches.Overall,ModelⅡ(W=a×Db×Hc)had higher goodness of fit and smaller standard error,and the accuracy of model checking was higher,which could be used as the optimal model for biomass model fitting of different organs in shrub layer at different restoration stages;2)With the near natural recovery,the order of the branch and trunk biomass of the woody community of P.massoniana plantations and the above-ground biomass of the community was overripe forest>mature forest>middle-aged forest>young forest,and the order of leaf biomass was middle-aged forest>overripe forest>mature forest>young forest.The biomass of each organ in the same community had significant difference among different ages of the same community(P<0.05).The leaf biomass of woody communities of different forest ages were(2.65±0.01)~(7.77±0.35)t/hm2,the branch biomass were(4.24±0.00)~(24.49±0.11)t/hm2,the trunk biomass were(24.32±0.01)~(236.51±1.22)t/hm2,and the above-ground biomass were(42.73±0.67)~(268.03±1.25)t/hm2,in which the trunk was dominant.Within each forest age in P.massoniana plantations,the order of the above-ground biomass of each layer was arbor layer>shrub layer>herb layer,and the arbor layer was the main body of the above-ground biomass of the P.massoniana populations;3)With the progress of near natural restoration,the order of above-ground biomass of P.massoniana populations were as follows:overripe forest>mature forest>middle-aged forest>young forest,and the proportion in the comm
作者
李玉凤
秦佳双
马姜明
杨章旗
李明金
陆绍浩
宋尊荣
LI Yufeng;QIN Jiashuang;MA Jiangming;YANG Zhangqi;LI Mingjin;LU Shaohao;SONG Zunrong(Key Laboratory of Superior Timber Trees Resource Cultivation(Guangxi Academy of Forestry Science),Nanning Guangxi,530002,China;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(Guangxi Normal University),Ministry of Education,Guilin Guangxi 541006,China;Guangxi Institute of Botany,the Chinese Academy of Sciences,Guilin Guangxi 541006,China;Zhenlong State-owned Forest Farm of Guangxi,Hengxian Guangxi 530327,China)
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2021年第4期170-180,共11页
Journal of Guangxi Normal University:Natural Science Edition
基金
广西优良用材林资源培育重点实验室开放课题(2019-B-04-01)
广西创新驱动发展专项课题(桂科AA17204087-7)
桂林市科学研究与技术开发计划项目(20190205,20180107-3)
广西研究生教育创新计划项目(XYCSZ2019081)。
关键词
生物量
估测模型
不同林龄
马尾松人工林
biomass
estimation model
different stand ages
Pinus massoniana plantations
