喀斯特区典型灌木小枝生物量间异速生长关系  

Allometric Relationship Between Twig Biomass of Typical Shrubs in Karst Regions

作　　者：赵文君 李娟 崔迎春 刘娜 周华 吴鹏 ZHAO Wenjun;LI Juan;CUI Yingchun;LIU Na;Zhou Hua;WU Peng(Guizhou Academy of Forestry,Guiyang 550005,Guizhou,China;Guizhou Libo Karst Forest Ecosystem National Observation and Research Station,Libo 558400,Guizhou,China;Guiyang Engineering Corporation Limited,Guiyang 550081,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]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550081

出　　处：《贵州林业科技》2024年第3期30-36,共7页Guizhou Forestry Science and Technology

基　　金：国家自然科学基金地区科学基金项目(32060244);贵州省天然林资源保护专项。

摘　　要：小枝是植物的重要组成单元,探讨其生物量分配策略及植物叶与小枝间的关系对其生态适应性有重要意义。本文以茂兰喀斯特区不同地形圆果化香树、香叶树、多脉青冈和卵果海桐为研究对象,分析小枝的叶重、叶柄、茎重等性状特征、生物量分配及异速生长关系。结果表明:各灌木种在槽谷生物量显著高于坡面,小枝重、叶重和茎重三者之间异速生长指数间存在显著差异。给定小枝重,坡地叶重增加速率高于槽谷,槽谷茎重增加高于坡地。多脉青冈和圆果化香树小枝重和茎重呈等速生长关系,其余小枝重、茎重和叶重三者之间呈异速生长关系。各灌木种叶柄重、小枝重和总叶重均呈小于1的异速生长关系,叶单重和出叶强度呈负异速生长关系。反映出喀斯特灌木较强的资源分配可塑性。Twig is one of the most important components of tree plants.It is of great significance to explore the allocation strategy of twig biomass for the better ecological adaptability in the relationship between leaves and twigs.In this study,the weight features were measured from the twig leaf,petiole and stem,in order to determine the biomass allocation and allometric growth.The research objects were taken as the Platycarya longipes,Lindera communis,Cyclobalanopsis multinervis,Pittosporum lenticellatum in the different terrain of Maolan Karst area.The results showed that the biomass of shrub species in the trough valley was significantly higher than that on the slope.There were significant differences in the allometric indexes among twig,leaf and stem weight.The increasing rate of leaf weight was also higher on the slope than that in the trough valley.While the increasing rate of stem weight was higher in the trough valley than that on the slope.An isokinetic growth was found in the twig and stem weight of Cyclobalanopsis multinervis and Platycarya longipes.The outstanding allometric relationship was achieved in the weight of twig,stem and leaf in the rest shrub species.Petiole,twig and the total leaf weight of shrub species showed an allometric relationship of less than 1.The single leaf weight and leafing intensity showed a negative allometric relationship.Therefore,the resource allocation can be expected to reshape the shrubs species in the karst regions.

关 键 词：小枝生物量 异速生长 灌木 喀斯特森林 茂兰 

分 类 号：Q948[生物学—植物学]