DOI: 10.1016/j.scitotenv.2019.135507
论文题名: Soil respiration and response of carbon source changes to vegetation restoration in the Loess Plateau, China
作者: Shi P. ; Qin Y. ; Liu Q. ; Zhu T. ; Li Z. ; Li P. ; Ren Z. ; Liu Y. ; Wang F.
刊名: Science of the Total Environment
ISSN: 489697
出版年: 2020
卷: 707 语种: 英语
英文关键词: Carbon source
; Grain for green
; Seasonal variation
; Soil respiration rate
Scopus关键词: Atmospheric chemistry
; Carbon dioxide
; Drought
; Ecosystems
; Forestry
; Land use
; Landforms
; Restoration
; Revegetation
; Sediments
; Soil conservation
; Vegetation
; Atmospheric carbon dioxide
; Carbon source
; Grain for greens
; Seasonal variation
; Soil respiration rates
; Terrestrial ecosystems
; Vegetation restoration
; Zhifanggou watershed
; Soils
; carbon dioxide
; carbon cycle
; carbon emission
; restoration ecology
; seasonal variation
; soil biota
; soil respiration
; vegetation structure
; Article
; carbon footprint
; carbon source
; China
; controlled study
; crop
; cropland
; forest
; grassland
; land use
; nonhuman
; plant root
; priority journal
; quantitative analysis
; seasonal variation
; shrub
; soil analysis
; soil microflora
; soil respiration
; vegetation
; watershed
; China
; Loess Plateau
英文摘要: Soil respiration is a large carbon flux from terrestrial ecosystems to the atmosphere, and small variations in soil respiration can prominently influence the global carbon (C) cycle. The vegetation changes could directly affect soil respiration. The large-scale “Grain for Green” project carried out on the Loess Plateau, China has importantly affected the contribution of soil respiration to atmospheric carbon dioxide (CO2). Therefore, it is important to study the effects of vegetation restoration on soil respiration. We selected four land-use types: crop, forest, shrub, and grassland in the Zhifanggou watershed to analyze variation in soil respiration during dry and rainy seasons. Furthermore, the source of CO2 emissions from soil respiration was identified using isotopes. The results showed that soil respiration in the rainy season was significantly higher than that in the dry season (P <.05). Soil respiration in the dry season was as follows: shrubland (1.04 μmol m−2 s−1) > cropland (0.72 μmol m−2 s−1) > forestland (0.44 μmol m−2 s−1) > grassland (0.33 μmol m−2 s−1). However, grass and forestland had significantly higher soil respiration than shrub and cropland in the rainy season (P <.05). Roots were the main source of soil respiration in cropland, which contributed >70% of CO2 emissions. Following revegetation, litter contributed more to soil respiration than roots or soil microorganisms at >68% of soil respiration. Our results provide a theoretical basis for assessing C balance in terrestrial ecosystems. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158728
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an, 710048, China; Key Laboratory of National Forestry Administration on Ecological Hydrology and Disaster Prevention in Arid Regions, Xi'an, 710048, China; Tianshui Soil and Water Conservation Experimental Station, Tianshui, 741000, China; College of Architecture, Xi'an University of Architecture and Technology, Xi'an, 710043, China
Recommended Citation:
Shi P.,Qin Y.,Liu Q.,et al. Soil respiration and response of carbon source changes to vegetation restoration in the Loess Plateau, China[J]. Science of the Total Environment,2020-01-01,707