摘要
为分析云南松苗木生物量分配特征随个体大小的变化规律,以云南松苗木为研究对象,采用整株收获法分析云南松2a生苗木615株,按器官测定生物量,分析生物量分配格局及其随苗木个体大小变化规律。结果表明,单株水平来看,云南松苗木生物量分配叶(58.13%)>茎(26.31%)>根(15.57%),光合器官(58.13%)>非光合器官(41.87%),地上部分(84.43%)>地下部分(15.57%),表明云南松苗木生物量器官间分配存在差异。云南松苗木单株水平的构件水平上生物量分配均存在较大波动,变异系数变化于6.07%~60.47%。根、茎、叶、地上部分、非光合器官各构件间生物量存在明显的线性关系(p<0.01),可利用这种关系进行生物量的估测。云南松苗木生物量分配随个体大小发生变化,可用幂函数曲线较好地拟合它们之间的关系,苗木个体小时,生物量倾向于地上部分的分配,其中又以向叶的分配占优势。综合来看,云南松苗木生物量器官间分配存在权衡,且受植株个体大小的影响。
In order to analyze the change of biomass distribution characteristics with plant size of Pinus yunnanensis seedling, taking P.yunnanensis seedlings as the object of study,615 2-year-old seedlings of P.yunnanensis were analyzed by full stem harvesting method.According to the determination of organ biomass, biomass allocation pattern and its change with plant size were analyzed.The results showed that concerning the individual plant level, P.yunnanensis seedling biomass was distributed in the following order: leaves biomass percentage(58.13%)>stem biomass percentage(26.31%)>root biomass percentage(15.57%),the photosynthetic organ biomass percentage(58.13%)>the photosynthetic organ biomass percentage(41.87%),above-ground biomass percentage(84.43%)>under-ground biomass percentage(15.57%),indicating that biomass allocation of P.yunnanensis seedling had trade-offs.Biomass allocations of P.yunnanensis seedling had large fluctuations on the individual plant level.The variation coefficient changed from 6.07% to 60.47%.The linear relationships were existed between root, stem and needle, above-ground part, the photosynthetic organ biomass(P<0.01),which could be used for biomass estimation.The biomass allocation of P.yunnanensis seedling changed with the plant size, and the available power function curve fitted well the relationship between them.When seedlings were little size, biomass allocation tended to be part of above-ground part, and distribution of needle biomass was dominated.In general, biomass allocation of P.yunnanensis seedling had trade-offs, and was subject to the influence of plant size.
作者
王瑜
蔡年辉
陈林
唐军荣
许玉兰
陈诗
WANG Yu;CAI Nianhui;CHEN Lin;TANG Junrong;XU Yulan;CHEN Shi(Key Laboratory of Biodiversity Conservation in Southwest China,State Forestry Administration,Southwest Forestry University,Kunming 650224,China;Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China Southwest Forestry University,Ministry of Education,Kunming 650224,China)
出处
《林业资源管理》
北大核心
2022年第6期101-108,共8页
Forest Resources Management
基金
云南省万人计划青年拔尖人才项目资助(YNWR-QNBJ-2019-075)
国家自然科学基金(31860203)
云南省研究生导师团队建设项目(2022-97)
西南林业大学第一批预研基金(01108-18200133)。
关键词
云南松
生物量分配
生长策略
个体大小
Pinus yunnanensis
biomass allocation
growth strategies
plant size
作者简介
王瑜(1996-),女,云南泸西人,在读硕士,研究方向:林木遗传育种研究。Email:1359193510@qq.com;通讯作者:陈诗(1981-),男,实验师,研究方向:森林培育研究。Email:cshi1981@qq.com。
