IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Effects of gravel on grassland soil carbon and nitrogen in the arid regions of the Tibetan Plateau
Wang, Xiaodan; Liu, Gangcai; Liu, Shuzhen
Corresponding AuthorWang, XD(王小丹)
2011
Source PublicationGEODERMA
ISSN0016-7061
Volume166Issue:1Pages:181-188
SubtypeArticle
AbstractMany previous studies have focused on soil gravel concentrations and their effect on crop yields in agricultural systems. The extent of carbon and nitrogen sequestration in soils under steppe systems in relation to surface gravel mulch remains largely unexplored. This study investigated the effects of gravel mulches on soil organic carbon and total nitrogen stocks in the arid and windy regions of the Tibetan Plateau. Surface gravel mulches provide a more favorable environment for soil carbon and nitrogen stocks than do non-mulched sites. Soil organic carbon and total nitrogen stocks were highest (46.9 Mg ha(-1) SOC and 2.8 Mg ha(-1) TN) in the medium gravel mulch sites with similar to 40-50% gravel, and lowest (29.5 Mg ha(-1) SOC and 1.4 Mg ha(-1) TN) in no gravel mulch sites. Analysis of aggregate size fractions indicated that the vast majority of SOC was present in microaggregate fractions throughout the top 30 cm of soil. Considering the low level of soil disturbance in the study area, the carbon contained in the macroaggregate fraction might become stabilized in the soil. Gravel mulches above the soil surface have an important bearing on soil carbon sequestration as they control wind erosion, decrease soil surface evaporation and change soil physical behavior in the arid and semiarid regions. (C) 2011 Elsevier B.V. All rights reserved.
KeywordStone Cover Soil Aggregate Carbon Sequestration Steppe Ecosystem
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.geoderma.2011.07.028
WOS Subject ExtendedAgriculture
Indexed BySCI
WOS KeywordLAND-USE PATTERNS ; ORGANIC-MATTER ; SIZE-FRACTIONS ; BULK-DENSITY ; CLIMATE-CHANGE ; FOREST SOILS ; STONE COVER ; ROOT-GROWTH ; SYSTEMS ; EROSION
Language英语
Quartile2区
TOP
WOS SubjectSoil Science
WOS IDWOS:000296043800018
Funding OrganizationChinese Academy of Sciences(KZCX2-YW-QN314) ; Institute of Mountain Hazards and Environment, Chinese Academy of Sciences(SDSQB-2010-02)
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5478
Collection山地表生过程与生态调控重点实验室
山地灾害与地表过程重点实验室
AffiliationChinese Acad Sci, Key Lab Mt Environm Evolvement & Regulat, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
First 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
Wang, Xiaodan,Liu, Gangcai,Liu, Shuzhen. Effects of gravel on grassland soil carbon and nitrogen in the arid regions of the Tibetan Plateau[J]. GEODERMA,2011,166(1):181-188.
APA Wang, Xiaodan,Liu, Gangcai,&Liu, Shuzhen.(2011).Effects of gravel on grassland soil carbon and nitrogen in the arid regions of the Tibetan Plateau.GEODERMA,166(1),181-188.
MLA Wang, Xiaodan,et al."Effects of gravel on grassland soil carbon and nitrogen in the arid regions of the Tibetan Plateau".GEODERMA 166.1(2011):181-188.
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