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
Grazing exclusion alters ecological stoichiometry of plant and soil in degraded alpine grassland

文献类型：期刊论文

作者Du, Chenjun1,2; Gao, Yongheng3,4
刊名AGRICULTURE ECOSYSTEMS & ENVIRONMENT
出版日期2021
卷号308页码:107256
关键词Fencing Plant recovery Dynamic Soil nutrient Tibetan Plateau
ISSN号0167-8809
DOI10.1016/j.agee.2020.107256
产权排序4
通讯作者Gao, Yongheng(gaoyh@cib.cas.cn)
文献子类Article
英文摘要Grazing exclusion is one of the most effective practices to recover the degraded alpine grasslands in Tibetan Plateau. In addition, ecological stoichiometry serves as a key regulator of ecosystem function and is also closely related to nutrient process. However, knowledge about the plant-soil interactions of stoichiometry throughout the growing season is still poorly understood. In this study, we examined how grazing exclusion affected the change of C-N-P stoichiometry of plant-soil by carrying out monthly sampling in three sites. The sites were: 9 years grazing exclusion, GE9; 5 years grazing exclusion, GE5; and free grazing, FG in degraded alpine meadow. Plant and soil samples were collected five times during the growing season (May-September) to analyze plant biomass and ecological stoichiometry. Across plots, profound fencing changed plant biomass and ecological stoichiometry. Specifically, increases in green, litter and root biomass were observed under grazing exclusion. Fencing increased plant C content, C:N, C:P, N:P ratios but declined N and P contents. In contrast to the plant, there was an increasing concentrations of soil C, N and P. Our study highlighted, under grazing exclusion, grasslands advanced soil C not only by greater biomass input but also higher plant C content. Greater soil N was mainly fixed by plant production, while enhancement of soil P was mainly due to plant production recovery to stop water erosion. With a continuous improvement of nutrient pools under short-term (< 9 years) grazing exclusion, our results showed that a long-term fencing practice effect ought to be monitored to recovery degraded alpine grassland. These findings also indicated that ecological stoichiometry provides a new insight for better understanding of the mechanisms of grazing exclusion effects on nutrient process.
电子版国际标准刊号1873-2305
WOS关键词BELOW-GROUND BIOMASS ; TIBETAN PLATEAU ; TEMPERATURE SENSITIVITY ; ELEMENTAL STOICHIOMETRY ; TERRESTRIAL ECOSYSTEMS ; CARBON DYNAMICS ; ORGANIC-CARBON ; NO IMPACT ; NITROGEN ; VEGETATION
资助项目National Key Research and Development Program of China[2016YFC0501802] ; Key Research and Development Program of Sichuan Province of China[2018NZ0048] ; Science and Technology Program of Qinghai Province of China[2019-HZ-807] ; Science and Technology Program of Qinghai Province of China[2019-ZJ-910]
WOS研究方向Agriculture ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000604619300004
出版者ELSEVIER
资助机构National Key Research and Development Program of China ; Key Research and Development Program of Sichuan Province of China ; Science and Technology Program of Qinghai Province of China
源URL[http://ir.imde.ac.cn/handle/131551/55216]  
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Gao, Yongheng
作者单位1.College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China;
2.Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China;
3.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China
4.CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China;
推荐引用方式
GB/T 7714		 Du, Chenjun,Gao, Yongheng. Grazing exclusion alters ecological stoichiometry of plant and soil in degraded alpine grassland[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2021,308:107256.
APA Du, Chenjun,&Gao, Yongheng.(2021).Grazing exclusion alters ecological stoichiometry of plant and soil in degraded alpine grassland.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,308,107256.
MLA Du, Chenjun,et al."Grazing exclusion alters ecological stoichiometry of plant and soil in degraded alpine grassland".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 308(2021):107256.

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。