莫莫格小叶章湿地植物功能性状对养分添加的响应  

Response of Plant Functional Traits to Nutrient Addition in Momoge Calamagrostis Angustifolia Wetland

作　　者：王乐 王晓东[1] 安雨[2] 刘晓辉[2] 王旋 WANG Le;WANG Xiao-dong;AN Yu;LIU Xiao-hui;WANG Xuan(School of Geographical Sciences,Changchun Normal University,Changchun 130032,China;Northeast Institute of Geography and Agricultural Ecology,Chinese Academy of Sciences,Changchun 130102,China)

机构地区：[1]长春师范大学地理科学学院,吉林长春130032 [2]中国科学院东北地理与农业生态研究所,吉林长春130102

出　　处：《长春师范大学学报》2023年第2期89-93,共5页Journal of Changchun Normal University

基　　金：国家重点研发计划项目课题“村镇建设资源环境承载力测算系统开发”(2018YFD1100101);国家自然科学基金项目“小叶章湿地植物功能性状对管理模式的响应及优势种群形成机制”(41871102);吉林省科技发展计划项目“莫莫格薹草-小叶章湿地植物群落维持机制:基于功能性状及其权衡”(20200201016JC);吉林省教育厅科学技术研究项目“长白山北坡和西坡林线景观动态对气候变化差异性响应机理研究”(JJKH20220830KJ)。

摘　　要：人为活动和气候变化的双重干扰下湿地植被发生明显退化。外源养分输入影响湿地植被演替与分布格局。开展湿地植被对养分添加的响应研究对于维持湿地植被群落及湿地生态系统的稳定至关重要。本研究以松嫩西部半干旱区莫莫格湿地小叶章植被为研究对象,通过氮肥(100 kg/hm 2)、磷肥(50 kg/hm 2)以及氮磷混合添加处理,明晰植物功能性状对外源养分添加的响应。结果表明,氮肥添加显著增加了小叶章比叶面积,但却降低了小叶章叶片干物质质量比;磷肥添加显著增加了小叶章叶片干物质质量比;养分添加处理显著增加了小叶章株高,与对照组相比,养分添加组小叶章株高提高了31%,但不同养分添加处理小叶章株高无明显差异(P>0.05);氮肥添加显著增加了小叶章湿地植物群落生物量,其中氮磷添加下植物群落生物量最高,为159.3 g/m ^(2)。养分添加能使植物功能性状发生改变,促进小叶章的生长和维持优势地位。研究结果为湿地保护和恢复提供科学依据。Wetland vegetation undergoes significant degradation due to both anthropogenic activities and climate change disturbances.Exogenous nutrient input affects the succession and distribution patterns of wetland vegetation.Research on the response of wetland vegetation to nutrient addition is essential to maintain the stability of wetland vegetation communities and wetland ecosystems.In this study,the response of plant functional traits to exogenous nutrient addition was clarified by adding nitrogen fertilizer(100 kg/hm 2),phosphorus fertilizer(50 kg/hm 2)and a combination of nitrogen and phosphorus fertilizers to the vegetation of Momoge wetland in the western semi-arid region of Songnen.The results showed that nitrogen fertilization significantly increased the specific leaf area but decreased the dry matter mass ratio of Calamagrostis angustifolia;phosphorus fertilization significantly increased the dry matter mass ratio of Calamagrostis angustifolia;the nutrient addition treatments significantly increased the height of Calamagrostis angustifolia,and the height of Calamagrostis angustifolia in the nutrient addition group increased by 31%compared with the control group,but there was no significant difference(P>0.05)between the nutrient addition treatments on the height of leaf.The nitrogen addition significantly increased the plant community biomass of Calamagrostis angustifolia wetland,with the highest plant community biomass of 159.3 g/m^(2)under nitrogen and phosphorus addition.nutrient addition could cause changes in plant functional traits,promote the growth and maintain the dominance of Calamagrostis angustifolia.The results of the study provide a scientific basis for wetland conservation and restoration.

关 键 词：莫莫格湿地 植物功能性状 养分添加 多重比较 

分 类 号：X53[环境科学与工程—环境工程]