Details
| Original language | English |
|---|---|
| Pages (from-to) | 663-671 |
| Number of pages | 9 |
| Journal | Environmental chemistry letters |
| Volume | 21 |
| Issue number | 2 |
| Early online date | 2 Feb 2023 |
| Publication status | Published - Apr 2023 |
Abstract
Soil carbon is major driver of climate in the long term because soil can either decrease global warming by carbon sequestration or increase warming by emissions of greenhouse gases. Soil inorganic carbon is mainly composed of carbonates and represents globally more than half of the total soil carbon stock up to a 2-m depth. The dissolution of carbonates by fertilization-induced acidification may offset the global efforts aimed at organic carbon sequestration, yet this process is poorly understood. Here, we evaluated the effects of fertilization strategies on inorganic carbon contents and stocks to 120 cm soil depth by using natural δ13C signature of organic and inorganic carbon in 32- and 40-year field experiments. Results show that long-term application of mineral nitrogen and phosphorous fertilizers acidified soils by 0.2 pH units. This caused inorganic carbon dissolution and carbon dioxide emissions of 9–12 Mg C per hectare, representing 12–18% of the initial stock in the top 60 cm. By contrast, manure application increased inorganic carbon stock by 8.9–11 Mg C per hectare, representing 4.8–17% of the initial stock up to 120 cm depth. The main pathway of inorganic carbon accumulation under organic fertilization is the neoformation of pedogenic carbonates and the conservation of lithogenic carbonates. Manure combined with mineral fertilizers did not affect inorganic carbon and therefore provides an optimal solution to mitigate carbon losses from soil.
Keywords
- C isotope application, Carbon sequestration, Land use practices, Mineral and organic fertilization, Pedogenic and geogenic carbonates
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Chemistry
Sustainable Development Goals
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In: Environmental chemistry letters, Vol. 21, No. 2, 04.2023, p. 663-671.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Long-term organic fertilizer-induced carbonate neoformation increases carbon sequestration in soil
AU - Liu, Enke
AU - Zhou, Jie
AU - Yang, Xiao
AU - Jin, Tao
AU - Zhao, Bingqiang
AU - Li, Lili
AU - Wen, Yanchen
AU - Soldatova, Evgeniya
AU - Zamanian, Kazem
AU - Gopalakrishnan, Subramaniam
AU - Mei, Xurong
AU - Kuzyakov, Yakov
N1 - Funding Information: This work was supported by the National Key R&D Program of China (2021YFE0101300), the National Natural Science Foundation of China (31961143017 and 42050410320), German Research Foundation (ZA 1068/4-1), Project CarboRus (075-15-2021-610), Government Program of Competitive Growth of Kazan Federal University, RUDN University Strategic Academic Leadership Program, and the Bio-Water Saving and Dry Farming Innovation Team Project of CAAS.
PY - 2023/4
Y1 - 2023/4
N2 - Soil carbon is major driver of climate in the long term because soil can either decrease global warming by carbon sequestration or increase warming by emissions of greenhouse gases. Soil inorganic carbon is mainly composed of carbonates and represents globally more than half of the total soil carbon stock up to a 2-m depth. The dissolution of carbonates by fertilization-induced acidification may offset the global efforts aimed at organic carbon sequestration, yet this process is poorly understood. Here, we evaluated the effects of fertilization strategies on inorganic carbon contents and stocks to 120 cm soil depth by using natural δ13C signature of organic and inorganic carbon in 32- and 40-year field experiments. Results show that long-term application of mineral nitrogen and phosphorous fertilizers acidified soils by 0.2 pH units. This caused inorganic carbon dissolution and carbon dioxide emissions of 9–12 Mg C per hectare, representing 12–18% of the initial stock in the top 60 cm. By contrast, manure application increased inorganic carbon stock by 8.9–11 Mg C per hectare, representing 4.8–17% of the initial stock up to 120 cm depth. The main pathway of inorganic carbon accumulation under organic fertilization is the neoformation of pedogenic carbonates and the conservation of lithogenic carbonates. Manure combined with mineral fertilizers did not affect inorganic carbon and therefore provides an optimal solution to mitigate carbon losses from soil.
AB - Soil carbon is major driver of climate in the long term because soil can either decrease global warming by carbon sequestration or increase warming by emissions of greenhouse gases. Soil inorganic carbon is mainly composed of carbonates and represents globally more than half of the total soil carbon stock up to a 2-m depth. The dissolution of carbonates by fertilization-induced acidification may offset the global efforts aimed at organic carbon sequestration, yet this process is poorly understood. Here, we evaluated the effects of fertilization strategies on inorganic carbon contents and stocks to 120 cm soil depth by using natural δ13C signature of organic and inorganic carbon in 32- and 40-year field experiments. Results show that long-term application of mineral nitrogen and phosphorous fertilizers acidified soils by 0.2 pH units. This caused inorganic carbon dissolution and carbon dioxide emissions of 9–12 Mg C per hectare, representing 12–18% of the initial stock in the top 60 cm. By contrast, manure application increased inorganic carbon stock by 8.9–11 Mg C per hectare, representing 4.8–17% of the initial stock up to 120 cm depth. The main pathway of inorganic carbon accumulation under organic fertilization is the neoformation of pedogenic carbonates and the conservation of lithogenic carbonates. Manure combined with mineral fertilizers did not affect inorganic carbon and therefore provides an optimal solution to mitigate carbon losses from soil.
KW - C isotope application
KW - Carbon sequestration
KW - Land use practices
KW - Mineral and organic fertilization
KW - Pedogenic and geogenic carbonates
UR - http://www.scopus.com/inward/record.url?scp=85147377354&partnerID=8YFLogxK
U2 - 10.1007/s10311-023-01568-4
DO - 10.1007/s10311-023-01568-4
M3 - Article
AN - SCOPUS:85147377354
VL - 21
SP - 663
EP - 671
JO - Environmental chemistry letters
JF - Environmental chemistry letters
SN - 1610-3653
IS - 2
ER -