短期氮添加对高寒草地植物高度和生产力的影响  

Effects of Short-Term Nitrogen Addition on Plant Height and Productivity in an Alpine Grassland

作　　者：王娟[1,2,3] 刘俊杰[1,2,3,4] 刘超[1,2,3] 王勇[5] WANG Juan;LIU Junjie;LIU Chao;WANG Yong(School of Ecology and Environment,Xinjiang University,Urumqi Xinjiang 830017,China;Key Laboratory of Oasis Ecology of Ministry of Education,Urumqi Xinjiang 830017,China;Xinjiang Jinghe of Observation and Research Station of Temperate Desert Ecosystem,Ministry of Education,Jinghe Xinjiang 833300,China;Technology Innovation Center for Ecological Monitoring and Restoration of Desert-Oasis,MNR,Urumqi Xinjiang 830002,China;Architecture Department,Henan Technical College of Construction,Zhengzhou Henan 450064,China)

机构地区：[1]新疆大学生态与环境学院,新疆乌鲁木齐830017 [2]新疆绿洲生态教育部重点实验室,新疆乌鲁木齐830017 [3]新疆精河温带荒漠生态系统教育部野外科学观测研究站,新疆精河833300 [4]自然资源部荒漠-绿洲生态监测与修复工程技术创新中心,新疆乌鲁木齐830002 [5]河南建筑职业技术学院建筑系,河南郑州450064

出　　处：《新疆大学学报（自然科学版）（中英文）》2023年第2期242-249,256,共9页Journal of Xinjiang University(Natural Science Edition in Chinese and English)

基　　金：新疆维吾尔自治区自然科学基金“不同氮素添加下巴音布鲁克草地蒸散发响应模式及预测”(2020D01C078);省部级资源共享平台建设项目“新疆精河温带荒漠生态系统野外科学观测平台建设”(PT2107);新疆大学博士科研启动基金“巴音布鲁克草地蒸散发对氮沉降响应研究”(2020BS01);“天池博士”科研项目“氮素添加对草地生态系统的影响研究”(tcbs201917)。

摘　　要：研究不同氮添加梯度和频次下草地生产力、植物高度、水分含量和干鲜比的变化趋势,利用样方调查法调查巴音布鲁克草原代表性物种,分析高寒草地常见植物高度、生产力和干鲜比比值.结果表明:该地区整体植物群落高度变化不显著,蔷薇科(Rosaceae)植物高度受氮添加梯度和频次的影响较大,禾本科(Poaceae)植物高度在两种氮添加频次下影响显著.莓叶委陵菜(Potentilla fragarioides)、冰草(Agropyron cristatum)、羊茅(Festuca ovina)植物高度在两种氮添加频次下差异显著.不同氮添加梯度和频次对植物地上生产力影响显著,随氮添加梯度的提升植物地上生产力呈现出增加趋势,禾本科植物生产力受氮添加因素的影响显著,蔷薇科和豆科(Fabaceae)植物生产力变化不大.巴音布鲁克草地植物的含水量介于35.10%~45.87%,干鲜比介于54.13%~64.90%.This paper investigates the trends of grassland productivity,plant height,moisture content,and dry-to-fresh ratio under different N addition gradients and frequencies,and analyzes the common plant height,productivity,and dry-to-fresh ratio of alpine grasslands using a sample survey method to investigate representative species in Bayinbuluke grassland.The overall plant community height in the region did not vary significantly.The plant height of Rosaceae was more influenced by the gradient and frequency of N addition.Poaceae plant height was significantly affected by both N addition frequencies.Plant height of Potentilla fragarioides,Agropyron cristatum,and Festuca ovina changed significantly between the two N addition frequencies.The effect of different N addition gradients and frequencies on plant above-ground productivity was significant.Plant above-ground productivity showed an increasing trend with an increasing N addition gradient.Gramineae productivity was significantly af-fected by N addition,while Rosaceae and Fabaceae productivity did not change much.The moisture content of Bayinbuluke grassland ranged from 35.10%to 45.87%and the dry-to-fresh ratio ranged from 54.13%to 64.90%.

关 键 词：氮添加 植物高度 地上生物量 高寒草地 干鲜比 水分含量 

分 类 号：Q948.1[生物学—植物学]