摘要
[目的]本文旨在探讨云南松苗木生物量特征与苗木质量指数间相对生长关系。[方法]以3年生云南松苗木为研究材料,采用整株收获法测定云南松苗木各构件生物量,以苗木质量指数作为苗木个体大小的评价,分析其生物量的分配特征。[结果]云南松苗木生物量分配存在较大的差异,且各构件间的分配也存在较大的波动,其中以叶、茎的分配占比较大。从生物量投资来看,在单株水平和构件水平上云南松苗木生物量积累与苗木质量指数均呈极显著正相关关系(P<0.01),表现为线性函数形式增长。从生物量分配格局来看,生物量分配与苗木质量指数间呈幂函数形式的异速生长关系。进一步分析表明,在单株水平上,苗木质量指数增加,生物量向根分配降低,而向地上部分分配增加。在构件水平上,苗木质量指数增加,根的分配中主根相对减少而侧根增加,地上部分向叶的分配增加而向茎分配减少。[结论]云南松苗木生物量分配与苗木质量指数间关系密切,苗木通过各器官间生物量投资差异来调整分配策略。
[Objective]The objective of this study was to explore the relationship between biomass characteristics and seedling quality indices of Pinus yunnanensis seedlings.[Method]Three-year-old P.yunnanensis seedlings were used as the research material.The whole plant harvesting method was used to measure the biomass of various plant parts of P.yunnanensis seed⁃lings,and the seedling quality index was used to evaluate the seedling size and to analyze the distribution characteristics of its biomass.[Result]The results showed that biomass allocation of P.yunnanensis seedlings significantly varied in different plant organs,and there was also large fluctuations in the distribution among various components,with leaves and stems distribution accounting for a relatively large proportion.From the perspective of biomass investment,the accumulations of biomass and the seedling quality indices were significantly positively correlated at the individual plant level and component level(P<0.01),showing a linear function form of growth.In terms of biomass allocation patterns,there was a power function form of allome⁃tric growth relationship between biomass allocation and seedling quality indices.Further analysis showed that at individual lev⁃el,as the seedling quality index increased,the biomass was allocated less to the roots and more to the aboveground part.At the component level,as the seedling quality index increased,the proportion of biomass allocated to main roots decreased,while it increased in lateral roots,and biomass allocation to leaves increased while the allocation to stems decreased in the above-ground part.[Conclusion]There is a close relationship between the biomass allocation of P.yunnanensis seedlings and their seedling quality indices,and the seedlings adjusted their distribution strategy through differences in biomass investment among different organs.
作者
郑超凡
周驰宇
贺斌
李瑞连
许玉兰
黄键
王德新
Zheng Chaofan;Zhou Chiyu;He Bin;Li Ruilian;Xu Yulan;Huang Jian;Wang Dexin(Forestry College,Southwest Forestry University,Kunming 650224,China;Yunnan Communications Vocational and Technical College,Kunming 650500,China;Yunnan General Administration of Forestry Seeds and Seedlings,Kunming 650215,China)
出处
《山西农业大学学报（自然科学版）》
CAS
北大核心
2023年第2期121-128,共8页
Journal of Shanxi Agricultural University(Natural Science Edition)
基金
云南省万人计划青年拔尖人才项目资助(YNWR-QNBJ-2019-075),国家自然科学基金项目(31860203),云南省研究生导师团队建设项目(2022-97),校科研基金资助(01108-18200133)。
关键词
云南松
生物量分配
苗木质量指数
异速生长
Pinus yunnanensis
Biomass allocation
Seedling quality index
Allometric growth
