DOI: 10.1016/j.atmosenv.2017.09.054
Scopus记录号: 2-s2.0-85031757865
论文题名: Precipitation-mediated responses of soil acid buffering capacity to long-term nitrogen addition in a semi-arid grassland
作者: Cai J ; , Luo W ; , Liu H ; , Feng X ; , Zhang Y ; , Wang R ; , Xu Z ; , Zhang Y ; , Jiang Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 170 起始页码: 312
结束页码: 318
语种: 英语
英文关键词: Base cation
; Cation exchange capacity
; Nitrogen deposition
; Precipitation regime
; Soil acidification rate
Scopus关键词: Acidification
; Nitrogen
; Positive ions
; Base cations
; Cation exchange capacities
; Nitrogen deposition
; Precipitation regimes
; Soil acidifications
; Soils
; cation
; nitrogen
; water
; acidification
; acidity
; buffering
; cation
; cation exchange capacity
; environmental conditions
; grassland
; nitrogen
; precipitation (chemistry)
; semiarid region
; terrestrial ecosystem
; Article
; cation exchange
; grassland
; precipitation
; priority journal
; semiarid climate
; soil acidification
; soil acidity
; steppe
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Atmospheric nitrogen (N) deposition can result in soil acidification and reduce soil acid buffering capacity. However, it remains poorly understood how changes in precipitation regimes with elevated atmospheric N deposition affect soil acidification processes in a water-limited grassland. Here, we conducted a 9-year split-plot experiment with water addition as the main factor and N addition as the second factor. Results showed that soil acid buffering capacity significantly decreased with increased N inputs, mainly due to the decline of soil effective cation exchange capacity (ECEC) and exchangeable basic cations (especially Ca2+), indicating an acceleration of soil acidification status in this steppes. Significant interactive N and water effects were detected on the soil acid buffering capacity. Water addition enhanced the soil ECEC and exchangeable base cations and thus alleviated the decrease of soil acid buffering capacity under N addition. Our findings suggested that precipitation can mitigate the impact of increased N deposition on soil acidification in semi-arid grasslands. This knowledge should be used to improve models predicting soil acidification processes in terrestrial ecosystems under changing environmental conditions. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82177
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; College of Environmental Science, Shenyang University, Shenyang, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Cai J,, Luo W,, Liu H,et al. Precipitation-mediated responses of soil acid buffering capacity to long-term nitrogen addition in a semi-arid grassland[J]. Atmospheric Environment,2017-01-01,170