黔竹秆形结构和地上生物量分配格局研究  

Study on the Culm Structure and Allocation of Aboveground Biomass of Dendrocalamus tsiangii

作　　者：侯贻菊 姚雾清 杨光能 崔迎春 周华 张喜 HOU Yi-ju;YAO Wu-qing;YANG Guang-neng;CUI Ying-chun;ZHOU Hua;ZHANG Xi(Guizhou Academy of Forest,Guiyang 550005,Guizhou,China;Guizhou Libo Observation and Research Station for Karst Forest Ecosystem,National Forestry and Grassland Administration,Libo 558400,Guizhou,China;Administrative Office of Maolan National Nature Reserve,Libo 558400,Guizhou,China)

机构地区：[1]贵州省林业科学研究院,贵州贵阳550005 [2]贵州荔波喀斯特森林生态系统国家定位观测研究站,贵州荔波558400 [3]贵州茂兰国家级自然保护区管理局,贵州荔波558400

出　　处：《竹子学报》2023年第4期51-57,共7页Journal of Bamboo Research

基　　金：贵州省科技计划项目(黔科合支撑〔2020〕1Y062号)。

摘　　要：【目的】以贵州特色材用竹种黔竹(Dendrocalamus tsiangii)为研究对象,研究立竹胸径和秆高、枝下高及构件生物量的相关性,分析黔竹节间长度变化规律、不同龄级立竹地上部分生物量分配格局,旨在进一步丰富黔竹生物学特性研究,为黔竹林生物量的估算提供参考。【方法】随机选取45株生长完整、无病虫害的1~3年生立竹,测量主要秆形指标和地上部分各构件生物量。【结果】黔竹胸径和竹高以及秆、枝、叶、地上部分总生物量间多种模型拟合的相关性达极显著水平。节间长度呈“短—长—短”的分布规律,节间长度为30~40 cm的竹节占32%。竹秆所占地上部分生物量比重最大,达85.52%。各构件平均含水率、生物量呈秆>枝>叶的变化趋势,且随龄级增加逐渐降低。胸径与地上部分总生物量、竹秆、竹枝及竹叶生物量的最优生长模型分别如下:W_(总)=0.372 D^(2)-0.753 D+1.316(R^(2)=0.897)、W_(秆)=0.343 D^(2)-0.875 D+1.311(R^(2)=0.891)、W_(枝)=0.047^(e 0.560 D)(R^(2)=0.479)、W_(叶)=0.079e^(0.469 D)(R^(2)=0.622)。【结论】研究一定程度上丰富了黔竹生物学特性研究成果,提出了黔竹胸径和地上总生物量及各构件生物量的数学模型,为准确估算黔竹林生物量提供了科学依据。【Objective】In this study,the relationship between DBH and height,height below branch,component biomass was studied by taking the natural sympodial bamboo(Dendrocalamus tsiangii)in Libo County as the research object.The variation rule of bamboo inter length and the distribution pattern of aboveground biomass were studied,aiming to further enrich the research results of biological characteristics of this bamboo species and provide reference for biomass estimate and sustainable management of D.tsiangii.【Method】Using random sampling method to determine the biomass of the aboveground part and the water content of each component.【Result】The results showed that the correlation between the DBH and height of D.tsiangii,as well as the total biomass of culms,branches,leaves,and aboveground parts,fitted by multiple models,reached a highly significant level.The bamboo internode length showed the distribution law of‘short—long—short’,and the bamboo culms whose internode length is 30-40 cm occupied 32%of the total.The aboveground biomass of the bamboo culms accounted for the largest proportion of the total,which reached 85.52%.The average water content of each component is decreasing in the trend of culm>branch>leaf,and gradually decreases with the increase of age class.The optimal growth models for DBH and total aboveground biomass,as well as biomass of bamboo culms,branches,and leaves,are as follows:W_(total)=0.372 D^(2)-0.753 D+1.316(R^(2)=0.897),W_(culm)=0.343 D^(2)-0.875 D+1.311(R^(2)=0.891),W_(branch)=0.047e^(0.560 D)(R^(2)=0.479)、W_(leaf)=0.079e^(0.469 D)(R^(2)=0.622),the research provided a theoretical basis for scientific management of D.tsiangii.【Conclusion】This paper has enriched the biological characteristics research of D.tsiangii forest to some degree,and proposed mathematical models for the diameter at breast height,total aboveground biomass,and biomass of each component of this bamboo species,which has provided a scientific basis for accurately estimating the biomass of the bamboo fores

关 键 词：黔竹 构件 生物量 分配格局 

分 类 号：S795[农业科学—林木遗传育种]