兰州大学机构库 >生命科学学院
Shrubs magnify soil phosphorus depletion in Tibetan meadows: Conclusions from C:N:P stoichiometry and deep soil profiles
Gao, Xiao-li1,2; Li, XG(李小刚)1; Zhao, Ling1; Kuzyakov, Yakov3
2021-09-01
Source PublicationScience of the Total Environment
ISSN00489697
Volume785
AbstractGlobally, the proliferation of shrubs within grasslands stimulates soil phosphorus (P) cycling and increases topsoil P storage beneath their canopies. However, little is known regarding the impact of shrub encroachment on subsoil P storage, and whether shrubs mediate changes in soil stoichiometry, like increasing P cycling. In grazed meadows on the Tibetan Plateau, soil and roots were sampled to 1 m depth in shrubby Hippophae rhamnoides ssp. sinensis groves and the surrounding grassy areas. Shrubs had higher P content than grasses, but lower C:P ratios in their leaves, litter, and roots. Similarly, shrubs had higher microbial P content than grasses, but lower microbial biomass C:P and N:P ratios in the soil. The larger microbial P stock in the 1 m of soil beneath shrubs responded to the larger root P stock there as well. Thus, both the plants and microbes acquired more P in shrubby areas than in grassy areas by accelerating P mineralization. The greater net production of available P in the topsoil and the synthesis of microbial P throughout the profile under shrubs increased the P solubility. Total P, inorganic P, and organic P stocks were lower under shrubs than under grasses in the top 1 m of soil. This decrease in soil P storage beneath shrubs is most likely attributable to P leaching due to higher P solubility, heavy rainfall, and larger soil gaps. Moreover, shrubs also had larger plant biomass P stock compared to grasses, and thus the depletion of P from the top 1 m of soil was further magnified via plant biomass removal. We concluded that shrubs increase P cycling to overcome the stoichiometric imbalance between their P requirement and the supply in the soil, and the fast P cycling under shrubs magnify P depletion within the rooted soil depth in alpine meadows. © 2021 Elsevier B.V.
KeywordAlpine meadow Ecological stoichiometry Grassy areas P cycling Phosphorus cycling Shrub encroachments Soil microbial biomass Soil phosphorus Soil phosphorus depletion Topsoil Alpine meadow Ecological stoichiometry Grassy areas P cycling Phosphorus cycling Shrub encroachments Soil microbial biomass Soil phosphorus Soil phosphorus depletion Topsoil
PublisherElsevier B.V.
DOI10.1016/j.scitotenv.2021.147320
Indexed ByEI
Language英语
EI Accession Number20211810307054
EI KeywordsSoils
EI Classification Number483.1 Soils and Soil Mechanics ; 801.4 Physical Chemistry ; 804 Chemical Products Generally
Original Document TypeJournal article (JA)
Citation statistics
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/451158
Collection生命科学学院
Affiliation1.State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou University, 222 South Tianshui Road, Lanzhou; 730000, China;
2.Henan Key Laboratory of Integrated Air Pollution Control and Ecological Security, Henan University, Kaifeng, Jinming Avenue, Henan; 475004, China;
3.Department of Soil Science of Temperate Ecosystems, Department of Agricultural Soil Science, University of Göttingen, Göttingen, Germany
First Author AffilicationSchool of Life Sciences
Recommended Citation
GB/T 7714
Gao, Xiao-li,Li, Xiaogang,Zhao, Ling,et al. Shrubs magnify soil phosphorus depletion in Tibetan meadows: Conclusions from C:N:P stoichiometry and deep soil profiles[J]. Science of the Total Environment,2021,785.
APA Gao, Xiao-li,Li, Xiaogang,Zhao, Ling,&Kuzyakov, Yakov.(2021).Shrubs magnify soil phosphorus depletion in Tibetan meadows: Conclusions from C:N:P stoichiometry and deep soil profiles.Science of the Total Environment,785.
MLA Gao, Xiao-li,et al."Shrubs magnify soil phosphorus depletion in Tibetan meadows: Conclusions from C:N:P stoichiometry and deep soil profiles".Science of the Total Environment 785(2021).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Altmetrics Score
Google Scholar
Similar articles in Google Scholar
[Gao, Xiao-li]'s Articles
[Li, Xiaogang]'s Articles
[Zhao, Ling]'s Articles
Baidu academic
Similar articles in Baidu academic
[Gao, Xiao-li]'s Articles
[Li, Xiaogang]'s Articles
[Zhao, Ling]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Gao, Xiao-li]'s Articles
[Li, Xiaogang]'s Articles
[Zhao, Ling]'s Articles
Terms of Use
No data!
Social Bookmark/Share
No comment.
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.