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
Fencing enclosure alters nitrogen distribution patterns and tradeoff strategies in an alpine meadow on the Qinghai-Tibetan Plateau

文献类型：期刊论文

作者Chen, Xiaopeng1,5,6; Zhang, Tao6; Guo, Ruiying6; Li, Haiyan1; Zhang, Rui7; Degen, A. Allan2; Huang, Kewei3; Wang, Ximing6; Bai, Yanfu6; Shang, Zhanhuan4,6
刊名CATENA
出版日期2021
卷号197页码:104948
关键词N-15 tracing Grazing exclusion Nutrition strategy Alpine meadow
ISSN号0341-8162
DOI10.1016/j.catena.2020.104948
产权排序6
通讯作者Shang, Zhanhuan(shangzhh@lzu.edu.cn)
文献子类Article
英文摘要The grasslands of Qinghai-Tibetan Plateau have become extremely degraded, resulting in widespread deficiency of soil N. In efforts to restore degraded lands, fencing enclosure has been used extensively. However, the effect of fencing on N allocation patterns and nutritional strategy of alpine plants are equivocal. In this study, we used N-15 tracer (CO ((NH2)-N-15)(2), 10 g N m(-2)) to examine the allocation and distribution of N in plants and soil in grasslands either grazed heavily by livestock or fenced for three years in an alpine meadow of Northern Tibet. The N-15 recovery (N-15(rec)) in shoots of the fenced enclosure increased by 207% in grasses, decreased by 103% in forbs, and did not change in sedges when compared to the grazed meadow. The N-15(rec) in shoots accounted for only 1.97% and 4.65% of the total N in the grazed and fenced meadows, respectively. Fencing increased soil N-15 content at 0-5 cm depth by 6.9%, but decreased the content at 5-10 cm depth by 11.7%. The results demonstrated that fencing altered the soil N distribution by increasing N-15 rec in top soil and by decreasing N-15(rec) in subsurface soil. In addition, fencing had no impact on root N-15 storage (33%-39%), N-15 losses (9.6%-12.5%) and soil available N-15(rec) (NH4+ -N, NO3--N and light fraction organic N), but decreased root:shoot N-15(rec) ratio by 49.8% (16.9:1 in grazed and 8.4:1 in fenced grassland). Fencing increased soil organic carbon, total N and NO3--N concentrations, which indicated that the strategy of the plants was to allocate relatively more N to roots in nutrient-poor soil (grazed) but relatively more N to shoots in nutrient-rich soil (fenced).
电子版国际标准刊号1872-6887
资助项目National Natural Science Foundation of China[31870433] ; National Natural Science Foundation of China[41671508] ; National Natural Science Foundation of China[31800402] ; National Natural Science Foundation of China[31961143012] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program[2019QZKK0302] ; National Key Research and Development Project[2016YFC0501906] ; Science and Technology Innovation Fund of Shanxi Agricultural University[2018YJ34] ; Key Laboratory of Vegetation Ecology, Ministry of Education ; Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
WOS记录号WOS:000597208600007
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program ; National Key Research and Development Project ; Science and Technology Innovation Fund of Shanxi Agricultural University ; Key Laboratory of Vegetation Ecology, Ministry of Education ; Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences
源URL[http://ir.imde.ac.cn/handle/131551/55162]  
专题中国科学院水利部成都山地灾害与环境研究所
通讯作者Shang, Zhanhuan
作者单位1.Key Laboratory of Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, Jilin 130024, China;
2.Desert Animal Adaptations and Husbandry, Wyler Department of Dryland Agriculture, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Beer Sheva 8410500, Israel;
3.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
4.Qinghai Provincial Key Laboratory of Restoration Ecology of Cold Area, Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining 810008, China
5.College of Grassland Science, Shanxi Agricultural University, Taigu 030801, China;
6.State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, China;
7.Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
推荐引用方式
GB/T 7714		 Chen, Xiaopeng,Zhang, Tao,Guo, Ruiying,et al. Fencing enclosure alters nitrogen distribution patterns and tradeoff strategies in an alpine meadow on the Qinghai-Tibetan Plateau[J]. CATENA,2021,197:104948.
APA Chen, Xiaopeng.,Zhang, Tao.,Guo, Ruiying.,Li, Haiyan.,Zhang, Rui.,...&Shang, Zhanhuan.(2021).Fencing enclosure alters nitrogen distribution patterns and tradeoff strategies in an alpine meadow on the Qinghai-Tibetan Plateau.CATENA,197,104948.
MLA Chen, Xiaopeng,et al."Fencing enclosure alters nitrogen distribution patterns and tradeoff strategies in an alpine meadow on the Qinghai-Tibetan Plateau".CATENA 197(2021):104948.

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。