若尔盖高原湿地木里苔草生理生态特征对水深梯度的响应  

Responses of Carex Muliensis growth characteristics to water level gradient in Zoige Plateau wetland

作　　者：董李勤[1] 杨文[1] 姚鹏举[1,2] 王洪军 王妍方 张昆[1,4] DONG Liqin;YANG Wen;YAO Pengju;WANG Hongjun;WANG Yanfang;ZHANG Kun(School of Geography and Tourism,Southwest Forestry University,Kunming 650224,China;College of Geography and Land Engineering,Yuxi Normal University,Yuxi 653100,China;Sichuan Zoige National Wetland Nature Reserve Administration,Aba 624000,China;National Plateau Wetlands Research Center,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]西南林业大学地理与生态旅游学院,昆明650224 [2]玉溪师范学院地理与国土工程学院,玉溪653100 [3]四川若尔盖湿地国家级自然保护区管理局,阿坝624000 [4]西南林业大学国家高原湿地研究中心,昆明650224

出　　处：《生态学报》2020年第2期590-598,共9页Acta Ecologica Sinica

基　　金：云南省教育厅基金项目(2019J0184,2018JS346);国家自然科学基金项目(41461022);西南林业大学科研启动基金项目(111425)

摘　　要：木里苔草作为一种典型的高原湿地植被景观,其生理生态特征受到水深梯度变化的显著影响。选取若尔盖高原沼泽湿地典型植物木里苔草(Carex muliensis)作为研究对象,通过模拟实验,研究了其在-5cm、-3.5cm、0cm、8cm和22cm水深梯度下株高、叶长和叶宽的生长特征及增长量的变化规律,以及叶绿素、叶氮和生物量的变化趋势。结果表明:木里苔草在水深为8cm时呈现最大的株高、叶长和叶宽,其中以株高对水深梯度的响应最为显著,叶宽对水深梯度的响应并不明显,适度干旱或淹水都对木里苔草生长起到促进作用。此外,叶绿素、叶氮含量和生物量也都在8cm水位下达到最大。通过此实验,可以阐明木里苔草生长对水深条件的响应,为若尔盖湿地保护和恢复提供数据支撑与实践依据。This paper investigated the growth characteristics including plant height,leaf length,leaf width,and their incremental pattern of Carex Muliensis,a typical grass in Zoige Plateau wetland under water level gradient of-5.0cm,-3.5cm,0.0cm,8.0cm,and 22.0cm.The results showed that the maximum plant height,leaf length,and leaf width of Carex Muliensis were found in the water depth of 8.0cm.The response of plant height to water depth gradient was the most significant,while the response of leaf width to water depth gradient was not obvious.The moderate drought or flooding can promote the growth of Carex Muliensis.In addition,chlorophyll,leaf nitrogen content,and biomass also reached the maximum under 8.0cm water level.Through this experiment,the response of the growth of Carex Muliensis to water depth conditions can be elucidated,which provides data support and practical basis for the protection and restoration of Zoige Wetland.

关 键 词：木里苔草 生理生态 水深梯度 若尔盖高原湿地 

分 类 号：Q945[生物学—植物学]