湖泊科学2026，Vol.38Issue(5)：1909-1919,中插12,12.DOI:10.18307/2026.0516
淹水时间对洞庭湖典型湿地植物生长及水质净化能力的影响
Effects of flooding duration on the growth and water purification capacity of typical wetland plants in Lake Dongting
摘要
Abstract
This study investigated the morphological,physiological,and functional(nutrient removal)responses of five typical wet-land plants in Lake Dongting-Acorus calamus,Zizania latifolia,Phragmites australis,Carex brevicuspis,and Typha orientalis-to different flooding durations(30,60,90,and 120 days).Results indicated that flooding duration significantly affected all meas-ured aspects.Morphologically,biomass and plant height of A.calamus decreased significantly over time,whereas P.australis,Z.latifolia,and T.orientalis showed continued increases in plant height.C.brevicuspis maintained relatively stable biomass and root length,with only a slight decrease in plant height.Physiologically,responses were species-specific.In Z.latifolia,malondialde-hyde(MDA)and soluble sugar contents decreased significantly,while antioxidant enzyme activity and chlorophyll content in-creased.In P.australis,superoxide dismutase(SOD)activity and proline content decreased,while soluble sugar content in-creased.In C.brevicuspis,the contents of MDA,SOD,and chlorophyll decreased,while soluble sugar and proline contents in-creased.In T.orientalis,MDA,SOD,and proline levels showed dynamic changes,decreasing initially,peaking at 90 days,and then declining,whereas its chlorophyll content decreased continuously.Regarding purification function,nitrogen and phosphorus removal rates of P.australis and T.orientalis improved continuously with prolonged flooding.In contrast,A.calamus,Z.latifo-lia,and C.brevicuspis reached peak removal efficiency at 60-90 days before declining.In summary,responses were highly spe-cies-specific and time-dependent.P.australis and T.orientalis maintained high purification efficiency under prolonged flooding,indicating their greater suitability as dominant species for long-term flooded wetland ecosystems.关键词
湿地植物/淹水胁迫/生物量响应/生理适应/水质净化效率Key words
Wetland plants/flooding stress/biomass response/physiological adaptation/water purification efficiency引用本文复制引用
李卓雅,潘柏含,余炜诚,李峰,黄如..淹水时间对洞庭湖典型湿地植物生长及水质净化能力的影响[J].湖泊科学,2026,38(5):1909-1919,中插12,12.基金项目
国家重点研发计划项目(2023YFC3208703)、湖南省科技创新平台计划项目(2022PT1010)、国家自然科学基金项目(42171062,42301068)、湖南省水利科技项目(XSKJ2024064-59)和安徽省省级环境保护科研项目(2023hb0001)联合资助. （2023YFC3208703）
