A global analysis of soil acidification caused by nitrogen addition
Tian, DS; Niu, SL
2015
Source PublicationENVIRONMENTAL RESEARCH LETTERS
ISSN1748-9326
Volume10Issue:2Pages:-
AbstractNitrogen (N) deposition-induced soil acidification has become a global problem. However, the response patterns of soil acidification to N addition and the underlying mechanisms remain far from clear. Here, we conducted a meta-analysis of 106 studies to reveal global patterns of soil acidification in responses to N addition. We found that N addition significantly reduced soil pH by 0.26 on average globally. However, the responses of soil pH varied with ecosystem types, N addition rate, N fertilization forms, and experimental durations. Soil pH decreased most in grassland, whereas boreal forest was not observed a decrease to N addition in soil acidification. Soil pH decreased linearly with N addition rates. Addition of urea and NH4NO3 contributed more to soil acidification than NH4-form fertilizer. When experimental duration was longer than 20 years, N addition effects on soil acidification diminished. Environmental factors such as initial soil pH, soil carbon and nitrogen content, precipitation, and temperature all influenced the responses of soil pH. Base cations of Ca2+, Mg2+ and K+ were critical important in buffering against N-induced soil acidification at the early stage. However, N addition has shifted global soils into the Al3+ buffering phase. Overall, this study indicates that acidification in global soils is very sensitive to N deposition, which is greatly modified by biotic and abiotic factors. Global soils are now at a buffering transition from base cations (Ca2+, Mg2+ and K+) to non-base cations (Mn2+ and Al3+). This calls our attention to care about the limitation of base cations and the toxic impact of nonbase cations for terrestrial ecosystems with N deposition.
SubtypeJournal
Keywordnitrogen deposition metal cations meta-analysis soil pH terrestrial ecosystem acid buffering capacity
Subject AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS Subject ExtendedEnvironmental Sciences ; Meteorology & Atmospheric Sciences
WOS KeywordALUMINUM TOXICITY ; TEMPERATE FORESTS ; EUROPEAN FORESTS ; ORGANIC-MATTER ; METAANALYSIS ; DEPOSITION ; CALCIUM ; CATIONS ; PLANTS ; GRASSLANDS
Indexed BySCI
Language英语
WOS IDWOS:000350573500021
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44453
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Tian, DS,Niu, SL. A global analysis of soil acidification caused by nitrogen addition[J]. ENVIRONMENTAL RESEARCH LETTERS,2015,10(2):-.
APA Tian, DS,&Niu, SL.(2015).A global analysis of soil acidification caused by nitrogen addition.ENVIRONMENTAL RESEARCH LETTERS,10(2),-.
MLA Tian, DS,et al."A global analysis of soil acidification caused by nitrogen addition".ENVIRONMENTAL RESEARCH LETTERS 10.2(2015):-.
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