Topography Variations Alter the Nitrogen Utilization Strategies of Two Dominant Plant Species in an Alpine Steppe
文献类型：期刊论文
| 作者 | Yu, Zunshan3,4,5; Du, Ziyin2; Hong, Jiangtao4,5; Zhang, Xiaoke1; Wang, Xiaodan4,5
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| 刊名 | JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
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| 出版日期 | 2024-06-17 |
| 页码 | 12 |
| 关键词 | Topography Nitrogen uptake Nitrogen forms Alpine steppe Montane ecosystem |
| ISSN号 | 0718-9508 |
| DOI | 10.1007/s42729-024-01868-w |
| 通讯作者 | Hong, Jiangtao(hongjiangtao@imde.ac.cn) ; Wang, Xiaodan(wxd@imde.ac.cn) |
| 英文摘要 | Topographic factors are important potential determinants of soil nitrogen (N) availability as they influence temperature and moisture at the local scale, thereby affecting plant N use strategies. To date, the effects of slope aspect and position on N acquisition pattern for alpine species remain poorly understood. We conducted a field 15N labeling experiment (i.e.,15N-NO3-, 15N-NH4+ or 15N-glycine) at three different aspects and altitudes to investigate effects of terrain changes on uptake of inorganic and organic N for two common plant species (Stipa purpurea and Saussurea japonica) in a semi-arid alpine steppe on the northern Tibetan Plateau. Plant N utilization strategies were largely controlled by changes in soil nutrients along the topographical gradients. The mean value of NO3- absorption rate was the highest among the three N forms for the two species (S. purpurea: 5.49 mu g N g- 1 dry mass; S. japonica: 4.73 mu g N g- 1 dry mass), but there were differences across various types of topography. At the lower sites, the two species showed a clear absorption preference for NH4+ and glycine, as these two N forms were the highest among the three slope positions. S. purpurea and S. japonica at the south-facing aspect had the highest NO3- absorption rate, which was well matched with the higher soil NO3- availability of the southern-facing aspect (1.65-3.19 mg kg- 1). Our study reveals that plant N utilization strategies are intricately linked to the variability of soil nutrients across different topographical gradients. These results underscore the critical role of physical topography in shaping N acquisition patterns in alpine ecosystems, offering valuable insights for anticipating how changes in climate may impact plant N uptake strategies in these environments. |
| WOS关键词 | ORGANIC NITROGEN ; TIBETAN PLATEAU ; AMINO-ACIDS ; N UPTAKE ; SOIL ; MINERALIZATION ; CLIMATE ; NITRATE ; CARBON ; ROOTS |
| 资助项目 | the Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK0404] ; Second Tibetan Plateau Scientific Expedition and Research Program[42271070] ; National Natural Science Foundation of China[xbzg-zdsys-202202] ; West Light Scholar of Chinese Academy of Sciences[XZ202201ZD0005G01] ; Tibetan Autonomous Region of China |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:001249550700002 |
| 出版者 | SPRINGER INT PUBL AG |
| 资助机构 | the Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; West Light Scholar of Chinese Academy of Sciences ; Tibetan Autonomous Region of China |
| 源URL | [http://ir.imde.ac.cn/handle/131551/58148]  |
| 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 |
| 通讯作者 | Hong, Jiangtao; Wang, Xiaodan |
| 作者单位 | 1.Hohai Univ, Sch Publ Adm, Nanjing 210098, Peoples R China 2.China West Normal Univ, Sch Land & Resources, Nanchong 637009, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Xainza Alpine Steppe & Wetland Ecosyst Observat St, Xainza 853100, Peoples R China 5.Chinese Acad Sci, Inst Mt Hazards & Environm, 189 Qunxiannanjie Rd, Chengdu 610041, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Zunshan,Du, Ziyin,Hong, Jiangtao,et al. Topography Variations Alter the Nitrogen Utilization Strategies of Two Dominant Plant Species in an Alpine Steppe[J]. JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION,2024:12. |
| APA | Yu, Zunshan,Du, Ziyin,Hong, Jiangtao,Zhang, Xiaoke,&Wang, Xiaodan.(2024).Topography Variations Alter the Nitrogen Utilization Strategies of Two Dominant Plant Species in an Alpine Steppe.JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION,12. |
| MLA | Yu, Zunshan,et al."Topography Variations Alter the Nitrogen Utilization Strategies of Two Dominant Plant Species in an Alpine Steppe".JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION (2024):12. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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