Details
| Original language | English |
|---|---|
| Article number | 114817 |
| Journal | GEODERMA |
| Volume | 384 |
| Publication status | Published - 15 Feb 2021 |
| Externally published | Yes |
Abstract
Soil carbonates (inorganic C mainly as CaCO3) account for about 750 Gt C in the top 1 m and more than 2300 Gt in the top 2 m (nearly equal to organic C stocks). These inorganic C stocks have millennial to million-year turnover times and protect natural soils from degradation. Under croplands, however, these inorganic C stocks are continuously lost as CO2 by neutralization of N-fertilization-induced soil acidification. We estimated that over the last 50 years, at least 0.41 Gt C have been released irrecoverably as CO2 to the atmosphere from agricultural soils, and an additional 0.72 Gt C will be released until 2050. These inorganic C losses make our soils vulnerable to physical, chemical and biological degradation. Liming – a common agricultural practice to neutralize soil acidification – is the 2nd enormous source of irrecoverable C, accounting annually for 0.27 Gt C losses as CO2. In conclusion, soil carbonate loss due to N-fertilization-induced acidification is a huge source of unaccounted CO2 from C stock, which is irrecoverable over the mankind lifetime.
Keywords
- Acidification, Agriculture, Carbon turnover, Global warming, Soil carbon pool
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
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In: GEODERMA, Vol. 384, 114817, 15.02.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Soil carbonates
T2 - The unaccounted, irrecoverable carbon source
AU - Zamanian, Kazem
AU - Zhou, Jianbin
AU - Kuzyakov, Yakov
N1 - Funding information: We acknowledge the German Research Foundation (ZA 1068/4-1), the National Natural Science Foundation of China (No. 46171295), the Government Program of Competitive Growth of Kazan Federal University and the RUDN University program 5-100 for their support. We also thank Sajjad Raza for drawing the draft of Fig. 2 .
PY - 2021/2/15
Y1 - 2021/2/15
N2 - Soil carbonates (inorganic C mainly as CaCO3) account for about 750 Gt C in the top 1 m and more than 2300 Gt in the top 2 m (nearly equal to organic C stocks). These inorganic C stocks have millennial to million-year turnover times and protect natural soils from degradation. Under croplands, however, these inorganic C stocks are continuously lost as CO2 by neutralization of N-fertilization-induced soil acidification. We estimated that over the last 50 years, at least 0.41 Gt C have been released irrecoverably as CO2 to the atmosphere from agricultural soils, and an additional 0.72 Gt C will be released until 2050. These inorganic C losses make our soils vulnerable to physical, chemical and biological degradation. Liming – a common agricultural practice to neutralize soil acidification – is the 2nd enormous source of irrecoverable C, accounting annually for 0.27 Gt C losses as CO2. In conclusion, soil carbonate loss due to N-fertilization-induced acidification is a huge source of unaccounted CO2 from C stock, which is irrecoverable over the mankind lifetime.
AB - Soil carbonates (inorganic C mainly as CaCO3) account for about 750 Gt C in the top 1 m and more than 2300 Gt in the top 2 m (nearly equal to organic C stocks). These inorganic C stocks have millennial to million-year turnover times and protect natural soils from degradation. Under croplands, however, these inorganic C stocks are continuously lost as CO2 by neutralization of N-fertilization-induced soil acidification. We estimated that over the last 50 years, at least 0.41 Gt C have been released irrecoverably as CO2 to the atmosphere from agricultural soils, and an additional 0.72 Gt C will be released until 2050. These inorganic C losses make our soils vulnerable to physical, chemical and biological degradation. Liming – a common agricultural practice to neutralize soil acidification – is the 2nd enormous source of irrecoverable C, accounting annually for 0.27 Gt C losses as CO2. In conclusion, soil carbonate loss due to N-fertilization-induced acidification is a huge source of unaccounted CO2 from C stock, which is irrecoverable over the mankind lifetime.
KW - Acidification
KW - Agriculture
KW - Carbon turnover
KW - Global warming
KW - Soil carbon pool
UR - http://www.scopus.com/inward/record.url?scp=85095915592&partnerID=8YFLogxK
U2 - 10.1016/j.geoderma.2020.114817
DO - 10.1016/j.geoderma.2020.114817
M3 - Article
AN - SCOPUS:85095915592
VL - 384
JO - GEODERMA
JF - GEODERMA
SN - 0016-7061
M1 - 114817
ER -