Details
| Original language | English |
|---|---|
| Article number | 106223 |
| Journal | Soil and Tillage Research |
| Volume | 244 |
| Early online date | 9 Jul 2024 |
| Publication status | E-pub ahead of print - 9 Jul 2024 |
Abstract
Rhizosphere dynamics exert significant control over soil carbon (C) processes in agroecosystems, especially under various fertilization regimes. However, the impact of fertilization regimes on soil organic carbon (SOC) mineralization and its temperature sensitivity (Q10) in the rhizosphere compared to bulk soil remains poorly understood. Here, we collected rhizosphere and bulk soils (0–20 cm) of maize from a five-year field experiment with four fertilization regimes: without fertilizer (CK), purely mineral fertilizer (NPK), half mineral fertilizers combined with half manure (NPKM), and purely manure (M). Soils were incubated at both 15 °C and 25 °C for 60 days. Results demonstrated that M decreased specific SOC mineralization by 10–25 % compared to the NPK, regardless of soil locations and temperatures. The Q10 of the labile C pool in the bulk soil was increased by 38–93 %, whereas in the rhizosphere, the Q10 of both labile and stable C pools exhibited a decrease of 5–23 % in the NPKM and M compared to the NPK and CK. Additionally, the rhizosphere exhibited lower specific SOC mineralization and Q10 of the stable C pool, but higher Q10 of the labile C pool compared to the bulk soil across all fertilization regimes. These contrasting responses of SOC mineralization and its Q10 in rhizosphere and bulk soils following manure application are attributed to the variations in nutrient availability (i.e., dissolved organic N and C) and microbial activities (i.e., microbial biomass C and enzyme activity). Therefore, fertilization regimes that provide microbially available organic compounds, such as manuring, effectively inhibit SOC mineralization and enhance SOC stability to global warming in the rhizosphere. Such fertilization strategy can serve as a climate-smart agricultural practice to achieve C neutrality.
Keywords
- Carbon sequestration, Climate warming, Fertilization regimes, Labile and stable carbon, Temperature sensitivity
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Agronomy and Crop Science
- Agricultural and Biological Sciences(all)
- Soil Science
- Earth and Planetary Sciences(all)
- Earth-Surface Processes
Sustainable Development Goals
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In: Soil and Tillage Research, Vol. 244, 106223, 12.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Enhanced soil organic carbon stability in rhizosphere through manure application
AU - Shao, Guodong
AU - Xu, Yi
AU - Zhou, Jie
AU - Tian, Peng
AU - Ai, Juanjuan
AU - Yang, Yadong
AU - Zamanian, Kazem
AU - Zeng, Zhaohai
AU - Zang, Huadong
N1 - Publisher Copyright: © 2024 Elsevier B.V.
PY - 2024/7/9
Y1 - 2024/7/9
N2 - Rhizosphere dynamics exert significant control over soil carbon (C) processes in agroecosystems, especially under various fertilization regimes. However, the impact of fertilization regimes on soil organic carbon (SOC) mineralization and its temperature sensitivity (Q10) in the rhizosphere compared to bulk soil remains poorly understood. Here, we collected rhizosphere and bulk soils (0–20 cm) of maize from a five-year field experiment with four fertilization regimes: without fertilizer (CK), purely mineral fertilizer (NPK), half mineral fertilizers combined with half manure (NPKM), and purely manure (M). Soils were incubated at both 15 °C and 25 °C for 60 days. Results demonstrated that M decreased specific SOC mineralization by 10–25 % compared to the NPK, regardless of soil locations and temperatures. The Q10 of the labile C pool in the bulk soil was increased by 38–93 %, whereas in the rhizosphere, the Q10 of both labile and stable C pools exhibited a decrease of 5–23 % in the NPKM and M compared to the NPK and CK. Additionally, the rhizosphere exhibited lower specific SOC mineralization and Q10 of the stable C pool, but higher Q10 of the labile C pool compared to the bulk soil across all fertilization regimes. These contrasting responses of SOC mineralization and its Q10 in rhizosphere and bulk soils following manure application are attributed to the variations in nutrient availability (i.e., dissolved organic N and C) and microbial activities (i.e., microbial biomass C and enzyme activity). Therefore, fertilization regimes that provide microbially available organic compounds, such as manuring, effectively inhibit SOC mineralization and enhance SOC stability to global warming in the rhizosphere. Such fertilization strategy can serve as a climate-smart agricultural practice to achieve C neutrality.
AB - Rhizosphere dynamics exert significant control over soil carbon (C) processes in agroecosystems, especially under various fertilization regimes. However, the impact of fertilization regimes on soil organic carbon (SOC) mineralization and its temperature sensitivity (Q10) in the rhizosphere compared to bulk soil remains poorly understood. Here, we collected rhizosphere and bulk soils (0–20 cm) of maize from a five-year field experiment with four fertilization regimes: without fertilizer (CK), purely mineral fertilizer (NPK), half mineral fertilizers combined with half manure (NPKM), and purely manure (M). Soils were incubated at both 15 °C and 25 °C for 60 days. Results demonstrated that M decreased specific SOC mineralization by 10–25 % compared to the NPK, regardless of soil locations and temperatures. The Q10 of the labile C pool in the bulk soil was increased by 38–93 %, whereas in the rhizosphere, the Q10 of both labile and stable C pools exhibited a decrease of 5–23 % in the NPKM and M compared to the NPK and CK. Additionally, the rhizosphere exhibited lower specific SOC mineralization and Q10 of the stable C pool, but higher Q10 of the labile C pool compared to the bulk soil across all fertilization regimes. These contrasting responses of SOC mineralization and its Q10 in rhizosphere and bulk soils following manure application are attributed to the variations in nutrient availability (i.e., dissolved organic N and C) and microbial activities (i.e., microbial biomass C and enzyme activity). Therefore, fertilization regimes that provide microbially available organic compounds, such as manuring, effectively inhibit SOC mineralization and enhance SOC stability to global warming in the rhizosphere. Such fertilization strategy can serve as a climate-smart agricultural practice to achieve C neutrality.
KW - Carbon sequestration
KW - Climate warming
KW - Fertilization regimes
KW - Labile and stable carbon
KW - Temperature sensitivity
UR - http://www.scopus.com/inward/record.url?scp=85198005775&partnerID=8YFLogxK
U2 - 10.1016/j.still.2024.106223
DO - 10.1016/j.still.2024.106223
M3 - Article
AN - SCOPUS:85198005775
VL - 244
JO - Soil and Tillage Research
JF - Soil and Tillage Research
SN - 0167-1987
M1 - 106223
ER -