Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 154087 |
| Fachzeitschrift | Science of the Total Environment |
| Jahrgang | 825 |
| Publikationsstatus | Veröffentlicht - 15 Juni 2022 |
| Extern publiziert | Ja |
Abstract
The long-term stability of soil inorganic carbon (SIC) and its minimum contribution towards global C cycle has been challenged, as recent studies have showed rapid decreases in SIC stocks in intensive agricultural systems. However, the extent of SIC losses and its driving factors remains unclear. Here, we compared changes in SIC density (SICD) in Chinese croplands between the 1980s and 2010s. The SIC contents in 1980s were obtained from second national soil survey (n = 949) and published studies (n = 47). The SIC contents in 2010s were based on resampling of soil profiles from the same locations during 2019 and 2020 (n = 30), as well as data from published studies and national soil survey (n = 903). We found that Chinese croplands have lost 27–38% of SICD from the 0–40 cm soil layer and that the soil pH has decreased by 0.53 units over the past 30 years. These SIC losses increased with the ratio of precipitation (P) to potential evapotranspiration (PET) and most notably with nitrogen (N) fertilization. The SICD decreased greatly in humid and semiarid regions, and these losses were enhanced by high N fertilization rates; however, the SICD increased in very arid regions. This analysis demonstrates that the water balance and N fertilization are major drivers leading to dramatic losses of SICD in croplands and, consequently, to decreases in soil fertility and functions.
ASJC Scopus Sachgebiete
- Umweltwissenschaften (insg.)
- Environmental engineering
- Umweltwissenschaften (insg.)
- Umweltchemie
- Umweltwissenschaften (insg.)
- Abfallwirtschaft und -entsorgung
- Umweltwissenschaften (insg.)
- Umweltverschmutzung
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in: Science of the Total Environment, Jahrgang 825, 154087, 15.06.2022.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Vulnerability and driving factors of soil inorganic carbon stocks in Chinese croplands
AU - Tao, Jingjing
AU - Raza, Sajjad
AU - Zhao, Mengzhen
AU - Cui, Jiaojiao
AU - Wang, Peizhou
AU - Sui, Yueyu
AU - Zamanian, Kazem
AU - Kuzyakov, Yakov
AU - Xu, Minggang
AU - Chen, Zhujun
AU - Zhou, Jianbin
N1 - Publisher Copyright: © 2022
PY - 2022/6/15
Y1 - 2022/6/15
N2 - The long-term stability of soil inorganic carbon (SIC) and its minimum contribution towards global C cycle has been challenged, as recent studies have showed rapid decreases in SIC stocks in intensive agricultural systems. However, the extent of SIC losses and its driving factors remains unclear. Here, we compared changes in SIC density (SICD) in Chinese croplands between the 1980s and 2010s. The SIC contents in 1980s were obtained from second national soil survey (n = 949) and published studies (n = 47). The SIC contents in 2010s were based on resampling of soil profiles from the same locations during 2019 and 2020 (n = 30), as well as data from published studies and national soil survey (n = 903). We found that Chinese croplands have lost 27–38% of SICD from the 0–40 cm soil layer and that the soil pH has decreased by 0.53 units over the past 30 years. These SIC losses increased with the ratio of precipitation (P) to potential evapotranspiration (PET) and most notably with nitrogen (N) fertilization. The SICD decreased greatly in humid and semiarid regions, and these losses were enhanced by high N fertilization rates; however, the SICD increased in very arid regions. This analysis demonstrates that the water balance and N fertilization are major drivers leading to dramatic losses of SICD in croplands and, consequently, to decreases in soil fertility and functions.
AB - The long-term stability of soil inorganic carbon (SIC) and its minimum contribution towards global C cycle has been challenged, as recent studies have showed rapid decreases in SIC stocks in intensive agricultural systems. However, the extent of SIC losses and its driving factors remains unclear. Here, we compared changes in SIC density (SICD) in Chinese croplands between the 1980s and 2010s. The SIC contents in 1980s were obtained from second national soil survey (n = 949) and published studies (n = 47). The SIC contents in 2010s were based on resampling of soil profiles from the same locations during 2019 and 2020 (n = 30), as well as data from published studies and national soil survey (n = 903). We found that Chinese croplands have lost 27–38% of SICD from the 0–40 cm soil layer and that the soil pH has decreased by 0.53 units over the past 30 years. These SIC losses increased with the ratio of precipitation (P) to potential evapotranspiration (PET) and most notably with nitrogen (N) fertilization. The SICD decreased greatly in humid and semiarid regions, and these losses were enhanced by high N fertilization rates; however, the SICD increased in very arid regions. This analysis demonstrates that the water balance and N fertilization are major drivers leading to dramatic losses of SICD in croplands and, consequently, to decreases in soil fertility and functions.
KW - Carbon cycle
KW - Greenhouse gases
KW - Nitrogen fertilization
KW - Soil acidification
KW - Soil inorganic carbon density
KW - Water balance
UR - http://www.scopus.com/inward/record.url?scp=85125360562&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2022.154087
DO - 10.1016/j.scitotenv.2022.154087
M3 - Article
C2 - 35218836
AN - SCOPUS:85125360562
VL - 825
JO - Science of the Total Environment
JF - Science of the Total Environment
SN - 0048-9697
M1 - 154087
ER -