高寒草甸群落结构对不同氮素添加的响应分析  

Responses Analysis of Alpine Meadow Community Structures to Different Nitrogen Additions

作　　者：刘俊杰[1,2,3] 王娟 袁顺捷[4] 韩亚南[1,2,3] 刘超 戎战磊 高云飞 赵传燕 LIU Junjie;WANG Juan;YUAN Shunjie;HAN Ya′nan;LIU Chao;RONG Zhanlei;GAO Yunfei;ZHAO Chuanyan(College of Ecology and Environment,Xinjiang University,Urumqi 830046,China;Key Laboratory of Oasis Ecology of Education Ministry,Xinjiang University,Urumqi 830046,China;Xinjiang Jinghe Temperate Desert Ecosystem Field Scientific Observation Research Station ofEducation Ministry,Xinjiang University,Urumqi 830046,China;Lanzhou Institute for Food and Drug Inspection,Lanzhou 730050,China;Institute of Plateau Science and Sustainability Development,Qinghai Normal University,Xining 810008,China;Key Laboratory of Tropical Island Ecology of Education Ministry,Hainan Normal University,Haikou 571158,China;State Key Laboratory of Grassland Agroecosystem,Lanzhou University,Lanzhou 730020,China)

机构地区：[1]新疆大学生态与环境学院,新疆乌鲁木齐830046 [2]新疆大学绿洲生态教育部重点实验室,新疆乌鲁木齐830046 [3]新疆大学新疆精河温带荒漠生态系统教育部野外科学观测研究站,新疆乌鲁木齐830046 [4]兰州市食品药品检验检测研究院,甘肃省兰州730050 [5]青海师范大学高原科学与可持续发展研究院,青海省西宁810008 [6]海南师范大学热带岛屿生态学教育部重点实验室,海南省海口571158 [7]兰州大学草地农业生态系统国家重点实验室,甘肃省兰州730020

出　　处：《华侨大学学报（自然科学版）》2022年第6期790-798,共9页Journal of Huaqiao University(Natural Science)

基　　金：“天池博士”科研基金资助项目(tcbs201917)。

摘　　要：为研究全球气候背景下氮沉降对高寒草甸物种组成、种内-种间关系,以及群落结构的影响,在青藏高原研究区开展不同氮素添加水平下的控制实验.设置对照(CK,0 g·m^(-2))、低氮(L-N,5 g·m^(-2))、中氮(M-N,10 g·m^(-2))和高氮(H-N,15 g·m^(-2))4个氮素添加水平,探讨不同氮素添加水平下群落物种空间分布格局和物种多样性的关系.结果表明:随着氮素添加水平的增加,垂穗披碱草聚集程度出现逐渐增强的趋势,条叶银莲花聚集程度出现逐渐减少的趋势,垂穗披碱草的正相互作用逐渐增强,条叶银莲花的负相互作用逐渐增强.In order to study the effects of nitrogen deposition on species composition, intraspecific-inter-specific relationship and community structure of alpine meadows under the background of global climate,control experiments under different nitrogen addition levels in Qinghai Tibet Plateau research area were carried out.Four nitrogen addition levels,including control(CK,0g·m^(-2)),low nitrogen(L-N,5g·m^(-2)),middle nitrogen(M-N,10g·m^(-2))and high nitrogen(H-N,15g·m^(-2)),were set to explore the relationship between species spatial distribution pattern and species diversity under different nitrogen levels.The results show that with the increase of nitrogen addition level,the aggregation degree of Elymus nutans Griseb.gradually increases,while that of Anemone grandiflora Hook.gradually decreases.In addition,the positive interaction of Elymus nutans Griseb.gradually increases,and the negative interaction of Anemone grandiflora Hook.gradually increases.

关 键 词：氮添加 高寒草甸 群落结构 种内-种间关系 响应机制 

分 类 号：Q948.1[生物学—植物学] S812[农业科学—草业科学]