IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Short-term grazing exclusion improved topsoil conditions and plant characteristics in degraded alpine grasslands
Du Chenjun1,2,3; Jing Jie2,3; Shen Yuan4; Liu Haixiu5; Gao Yongheng1,2
Corresponding AuthorGao, Yongheng(yhgao@imde.ac.cn)
2020
Source PublicationECOLOGICAL INDICATORS
ISSN1470-160X
EISSN1872-7034
Volume108Pages:UNSP 105680
SubtypeArticle
Contribution Rank2
AbstractGrazing exclusion by fencing is one of the most effective practices to recover the degraded alpine grasslands in Tibetan Plateau. In the present study, the effects of 8-year (GE8) and 4-year (GE4) grazing exclusion were studied in comparison with free grazing (FG) in the plant-soil ecosystems of alpine grasslands. Within fencing, improved plant characteristics such as aboveground biomass (AGB), belowground biomass (BGB) and plant total cover developed without grazing and trampling were observed. Also, there were significant improvements of soil organic carbon (SOC), ammonia nitrogen (NH 4(+)-N) and dissolved organic carbon (DOC) concentrations usually in the topsoil (0-30 cm) but a stable C:N ratio with the number of years of grazing exclusion. Fencing enhanced soil main enzyme (invertase, phosphatase, urease and beta-glucosidase) activities by providing sufficient substrates for microbial activities. Unexpectedly, GE4 had higher soil invertase, phosphatase, urease and beta-glucosidase activities than GE8, which had less plant diversity, richness and higher total cover causing a lowering of soil temperature. Additionally, the results supported the allometric allocation hypothesis for the ABG versus BGB in the grasslands of Tibetan Plateau. Our results indicated that SOC and BGB can be used as indicators of the restoration process of degraded alpine grassland. Cautions should be taken for a long-term fencing in degraded alpine grasslands because of the loss of plant richness, diversity and soil enzyme activities. The present results also suggested that a suitable grazing regime combined with fencing should be focused in the future study of the alpine grasslands. Research results obtained in the present study should, therefore, be helpful to offer a better guidance towards the management practices of the degraded alpine grasslands.
KeywordTibetan Plateau Grassland degradation Fencing Soil nutrients Enzyme activity
DOI10.1016/j.ecolind.2019.105680
Indexed BySCI
WOS KeywordBELOW-GROUND BIOMASS ; QINGHAI-TIBETAN PLATEAU ; SOIL MICROBIAL BIOMASS ; CARBON STORAGE ; NO IMPACT ; SPECIES RICHNESS ; LOESS PLATEAU ; DIVERSITY ; DEGRADATION ; VEGETATION
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFC0501802] ; International Cooperation Program of Qinghai Province of China[2019-HZ-807] ; Key Research and Development Program of Sichuan Province of China[18ZDYF0318] ; Hundred Young Talents Program of the Institute of Mountain Hazards and Environment, Chinese Academy of Sciences[SDSQB-2016-02]
WOS Research AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS SubjectBiodiversity Conservation ; Environmental Sciences
WOS IDWOS:000493902400011
Funding OrganizationNational Key Research and Development Program of China ; International Cooperation Program of Qinghai Province of China ; Key Research and Development Program of Sichuan Province of China ; Hundred Young Talents Program of the Institute of Mountain Hazards and Environment, Chinese Academy of Sciences
PublisherELSEVIER
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/32288
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorGao Yongheng
Affiliation1.Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China;
2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
3.College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;
4.College of Life Science & Biotechnology, Mianyang Teachers’ College, Mianyang 621000, China;
5.Ledu Forestry Bureau, Haidong 810699, China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Du Chenjun,Jing Jie,Shen Yuan,et al. Short-term grazing exclusion improved topsoil conditions and plant characteristics in degraded alpine grasslands[J]. ECOLOGICAL INDICATORS,2020,108:UNSP 105680.
APA Du Chenjun,Jing Jie,Shen Yuan,Liu Haixiu,&Gao Yongheng.(2020).Short-term grazing exclusion improved topsoil conditions and plant characteristics in degraded alpine grasslands.ECOLOGICAL INDICATORS,108,UNSP 105680.
MLA Du Chenjun,et al."Short-term grazing exclusion improved topsoil conditions and plant characteristics in degraded alpine grasslands".ECOLOGICAL INDICATORS 108(2020):UNSP 105680.
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