若尔盖高原湿地3种生境地下芽库特征及其差异  

Differences in Characteristics of Belowground Bud Bank Among Three Plateau Habitats in Zoige Plateau Wetland

作　　者：王娜[1] 夏敏 王行[1] 刘振亚[1] 刘耘硕 王好才 肖德荣 吕梅 Wang Na;Xia Min;Wang Hang;Liu Zhenya;Liu Yunshuo;Wang Haocai;Xiao Derong;Lv Mei(National Plateau Wetlands Research Center/College of Wetlands,Southwest Forestry University,Kunming,Yunnan 650224,China;College of Life and Environmental Sciences,Wenzhou University,Wenzhou,Zhejiang 325035,China;Forestry Bureau of Weining County,Weining,Guizhou 553100,China)

机构地区：[1]西南林业大学国家高原湿地研究中心/湿地学院,云南昆明650224 [2]温州大学生命与环境科学学院,浙江温州325035 [3]贵州省威宁县林业局,贵州威宁553100

出　　处：《水土保持通报》2021年第1期41-48,共8页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目“滇西北高原湿地湖滨带优势植物地下芽库对模拟大气增温的响应”(41867059),“滇西北高原典型湿地湖滨带植物物候、生长与繁殖对增温的响应”(31370497)。

摘　　要：[目的]掌握植物地下芽库多样性及形成的环境机制,为保护和恢复生物多样性提供理论依据。[方法]以若尔盖高原湿地的沼泽、沼泽化草甸和草甸3种生境为对象,运用单因素方差分析、相关性分析以及通径分析等对试验数据进行处理。[结果]①芽库密度表现为沼泽>沼泽化草甸>草甸,生境间差异显著。沼泽以水平生长的根茎顶芽为主,沼泽化草甸和草甸则分别以根茎节芽和分蘖节芽为主。②芽的长度表现为沼泽>沼泽化草甸>草甸,生境间差异显著。沼泽和沼泽化草甸的芽的直径均显著高于草甸,但沼泽和沼泽化草甸间无显著差异。沼泽的芽长/直径比值和生物量均显著高于沼泽化草甸和草甸,但沼泽化草甸和草甸间无显著差异。③芽的全氮含量(TNB)也表现为沼泽>沼泽化草甸>草甸,且均差异显著,三者的全磷含量及芽氮磷比值无显著差异。[结论]在若尔盖高原,土壤水分、速效氮和全磷是解释芽库密度、芽形态(长度、直径)、芽生物量,以及芽生态化学计量的主控因子。[Objective]The diversity of belowground bud banks and their underlying environmental determinants were studied in order to provide important theoretical value for protecting and restoring biodiversity.[Methods]Three habitats such as marsh(MA),marsh meadow(MM),and meadow(ME)in the Zoige Plateau wetland were selected as the study object,and the experimental data were processed by single-factor analysis of variance,correlation analysis,and path analysis.[Results]①The total density of the belowground bud bank in MA was the largest,followed by those of MM and ME.Among the habitats,significant differences were recorded.Bud banks in MA were dominated by horizontal apical rhizome buds,while the bud banks in MM and ME were dominated by axillary rhizome buds and shoot buds,respectively.②The bud length of MA was much larger than that in MM and ME,and the differences between these habitats were significant.The bud diameters of MA and MM were much larger than that in ME,while no significant difference was recorded between MA and MM.The bud length/diameter in MA was significantly larger than those in MM and ME,while there was no significant difference recorded between MM and ME.③The total nitrogen content of belowground bud(TNB)in MA was much larger than that in MM and ME,and a significant difference between habitats was found.However,no significant differences were recorded between the habitats for both total phosphorus content of bud(TPB)and the TNB/TPB ratio.[Conclusion]Soil moisture,available nitrogen,and total phosphorus were the main factors controlling density,morphology(length and diameter),biomass,and ecological stoichiometry of belowground buds on the Zoige Plateau.

关 键 词：横断山区 高原湿地 芽库多样性 克隆生长 

分 类 号：Q948.1[生物学—植物学]