鄱阳湖枯水期水域特征对季节性淹水湿地优势植被固碳能力的影响  

Effects of Water Characteristics on Carbon Sequestration Capacity of Dominant Vegetation in Seasonal Waterlogged Wetlands of Poyang Lake in Dry Season

作　　者：孙清凡 钱海燕 任盛明 陈莎莎 周杨明[3] SUN Qing-fan;QIAN Hai-yan;REN Sheng-ming;CHEN Sha-sha;ZHOU Yang-ming(School of Earth Sciences,East China University of Technology,Nanchang 330013,China;Jiangxi Provincial Natural Resources Policy Investigation and Evaluation Center,Nanchang 330046,China;School of Geography and Environment,Jiangxi Normal University,Nanchang 330200,China)

机构地区：[1]东华理工大学地球科学学院,江西南昌330013 [2]江西省自然资源政策调查评估中心,江西南昌330046 [3]江西师范大学地理与环境学院,江西南昌330200

出　　处：《江西农业学报》2023年第2期174-181,共8页Acta Agriculturae Jiangxi

基　　金：国家自然科学基金项目(41561105);江西省自然科学基金面上项目(20212BAB203002);江西省重点研发计划项目(20181 BBG70037);东华理工大学博士科研启动基金项目(DHBK201909838);江西省自然资源厅科技创新项目(ZRKJ20222311)。

摘　　要：选择了鄱阳湖湿地具有不同水域特征的常湖池(控湖)、蚌湖(半控湖)和泗洲头(开放水域)的典型优势植被苔草(Carex cinerascens)、南荻(Triarrhena lutarioriparia)和芦苇(Phragmites australis)为研究对象,研究了植被生物量、碳含量、植被净初值生产力和释氧量在不同水域特征下的分布特征,基于多种统计学分析方法量化水域特征对植被固碳能力的影响,揭示了其主要影响因素。研究表明:控湖的常湖池、半控湖的蚌湖、开放水域的泗洲头植被碳密度分别为17.98、13.06、16.74 t/hm2,植被固碳量分别为2623.21、25651.62、14344.81 t。常湖池不同植被间固碳能力差异较小,泗洲头和蚌湖不同植被固碳能力差异较大。ABT分析则表明,水域条件、土壤有机碳含量是植被根碳含量的主要影响因子,水文梯度是植被地上碳含量和碳密度的首要影响因子。The typical dominant vegetation Carex cinerascens,Triarrhena lutarioriparia and Phragmites australis in Changhuchi(controlled lake),Banghu(semi-controlled lake)and Sizhoutou(open water)of Poyang Lake wetland with different water characteristics were selected as the research objects.The distribution characteristics of vegetation biomass,carbon content,Nett primaty productivity(NPP)and oxygen release under different water characteristics were studied.Based on a variety of statistical analysis methods,the influence of water characteristics on vegetation carbon sequestration capacity was quantified,and the main infuential factors were revealed.The carbon density of Changhuchi(controlled lake),Banghu(semi-controlled lake)and Sizhoutou(open water)are 17.98 t/hm2,13.06 t/hm2 and 16.74 t/hm2,respectively.The carbon sequestration is 2623.21 t,25651.62 t and 14344.81 t,respectively.Analysis of variance shows that there is little difference in carbon sequestration capacity between different vegetations in Changhuchi,and there is great difference in carbon sequestration capacity between different vegetations in Sizhoutou and Banghu.ABT analysis shows that water characteristics and SOC are the main influencing factors of root carbon content,and water gradient is the primary influencing factor of aboveground carbon content.

关 键 词：鄱阳湖湿地 固碳 控湖 半控湖 开放水域 集成推进树算法 

分 类 号：X171.1[环境科学与工程—环境科学]