中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 成都山地灾害与环境研究所
  3. 中国科学院水利部成都山地灾害与环境研究所
  4. 山地表生过程与生态调控重点实验室
Seasonal shifting in the absorption pattern of alpine species for NO3- and NH4+ on the Tibetan Plateau

文献类型：期刊论文

作者Hong Jiangtao1; Qin Xiaojing1,2; Ma Xingxing3; Xu Xin1,2; Wang Xiaodan1
刊名BIOLOGY AND FERTILITY OF SOILS
出版日期2019
卷号55期号:8页码:801-811
关键词Nitrogen uptake Nitrogen forms Nitrogen recovery Seasonal variation Alpine steppe
ISSN号0178-2762
DOI10.1007/s00374-019-01392-5
产权排序1
文献子类Article
英文摘要Using an N-15 labelling method (N-15-NH4+ and N-15-NO3-) we conducted a time series experiment of N absorption for two common plant species (Stipa purpurea and Artemisia nanschanica) in three seasons (summer late autumn and early spring) in a semi-arid alpine steppe ecosystem on the Tibetan Plateau. The soil NO3- content was significantly higher than the exchangeable NH4+ content in summer whereas exchangeable NH4+ was the dominant inorganic form of N during the cold seasons (late autumn and early spring). Both S. purpurea and A. nanschanica showed a preference for NO3- in summer. The uptake rates of NO3- ranged from 1.09 to 3.94 mu g N-15 g(-1) DW root h(-1) for S. purpurea and from 2.85 to 7.82 mu g N-15 g(-1) DW root h(-1) for A. nanschanica. In contrast both species showed a clear preference for NH4+ during the late autumn and early spring which was strongly dependent on snowfall events. The uptake rate of NH4+ ranged from 0.33 to 4.25 mu g N-15 g(-1) DW root h(-1) for S. purpurea and from 0.67 to 9.05 mu g N-15 g(-1) DW root h(-1) for A. nanschanica. We also observed that N-15 recovery was mainly retained in the roots with a smaller proportion of N-15 stored in the shoots across all seasons. The seasonal shift in the pattern of N absorption may be influenced by changes in the ratios of soil exchangeable NH4+ to NO3- in the different seasons. This finding offers valuable insights into the nutrient acquisition strategies of alpine plants and provides an important mechanism for the temporal pattern of N utilisation by plants in alpine environments.
电子版国际标准刊号1432-0789
语种英语
WOS记录号WOS:000494475700005
源URL[http://ir.imde.ac.cn/handle/131551/32297]  
专题成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位1.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, No. 9, Block 4, Renminnanlu Road, Chengdu 610041, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China;
3.College of Urban and Environment Sciences, Shanxi Normal University, Linfen 041000, China
推荐引用方式
GB/T 7714		 Hong Jiangtao,Qin Xiaojing,Ma Xingxing,et al. Seasonal shifting in the absorption pattern of alpine species for NO3- and NH4+ on the Tibetan Plateau[J]. BIOLOGY AND FERTILITY OF SOILS,2019,55(8):801-811.
APA Hong Jiangtao,Qin Xiaojing,Ma Xingxing,Xu Xin,&Wang Xiaodan.(2019).Seasonal shifting in the absorption pattern of alpine species for NO3- and NH4+ on the Tibetan Plateau.BIOLOGY AND FERTILITY OF SOILS,55(8),801-811.
MLA Hong Jiangtao,et al."Seasonal shifting in the absorption pattern of alpine species for NO3- and NH4+ on the Tibetan Plateau".BIOLOGY AND FERTILITY OF SOILS 55.8(2019):801-811.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。