Details
| Original language | English |
|---|---|
| Pages (from-to) | 2478-2490 |
| Number of pages | 13 |
| Journal | Global change biology |
| Volume | 27 |
| Issue number | 11 |
| Early online date | 13 Mar 2021 |
| Publication status | Published - 7 May 2021 |
Abstract
Paddy soils make up the largest anthropogenic wetlands on earth, and are characterized by a prominent potential for organic carbon (C) sequestration. By quantifying the plant- and microbial-derived C in soils across four climate zones, we identified that organic C accrual is achieved via contrasting pathways in paddy and upland soils. Paddies are 39%–127% more efficient in soil organic C (SOC) sequestration than their adjacent upland counterparts, with greater differences in warmer than cooler climates. Upland soils are more replenished by microbial-derived C, whereas paddy soils are enriched with a greater proportion of plant-derived C, because of the retarded microbial decomposition under anaerobic conditions induced by the flooding of paddies. Under both land-use types, the maximal contribution of plant residues to SOC is at intermediate mean annual temperature (15–20°C), neutral soil (pH~7.3), and low clay/sand ratio. By contrast, high temperature (~24°C), low soil pH (~5), and large clay/sand ratio are favorable for strengthening the contribution of microbial necromass. The greater contribution of microbial necromass to SOC in waterlogged paddies in warmer climates is likely due to the fast anabolism from bacteria, whereas fungi are unlikely to be involved as they are aerobic. In the scenario of land-use conversion from paddy to upland, a total of 504 Tg C may be lost as CO2 from paddy soils (0–15 cm) solely in eastern China, with 90% released from the less protected plant-derived C. Hence, preserving paddy systems and other anthropogenic wetlands and increasing their C storage through sustainable management are critical for maintaining global soil C stock and mitigating climate change.
Keywords
- biomarker approach, carbon sequestration, climate zone, lignin phenol, microbial necromass, paddy and upland
ASJC Scopus subject areas
- Environmental Science(all)
- Global and Planetary Change
- Environmental Science(all)
- Environmental Chemistry
- Environmental Science(all)
- Ecology
- Environmental Science(all)
- General Environmental Science
Sustainable Development Goals
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In: Global change biology, Vol. 27, No. 11, 07.05.2021, p. 2478-2490.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Contrasting pathways of carbon sequestration in paddy and upland soils
AU - Chen, Xiangbi
AU - Hu, Yajun
AU - Xia, Yinhang
AU - Zheng, Shengmeng
AU - Ma, Chong
AU - Rui, Yichao
AU - He, Hongbo
AU - Huang, Daoyou
AU - Zhang, Zhenhua
AU - Ge, Tida
AU - Wu, Jinshui
AU - Guggenberger, Georg
AU - Kuzyakov, Yakov
AU - Su, Yirong
N1 - Funding Information: This study was supported financially by the National Natural Science Foundation of China (41877035, 41977100, 41671298), the National Key Research Program of China (2016YFD0200106), the Natural Science Foundation of Guangxi (2018GXNSFAA138020), and by the “RUDN University program 5-100.”
PY - 2021/5/7
Y1 - 2021/5/7
N2 - Paddy soils make up the largest anthropogenic wetlands on earth, and are characterized by a prominent potential for organic carbon (C) sequestration. By quantifying the plant- and microbial-derived C in soils across four climate zones, we identified that organic C accrual is achieved via contrasting pathways in paddy and upland soils. Paddies are 39%–127% more efficient in soil organic C (SOC) sequestration than their adjacent upland counterparts, with greater differences in warmer than cooler climates. Upland soils are more replenished by microbial-derived C, whereas paddy soils are enriched with a greater proportion of plant-derived C, because of the retarded microbial decomposition under anaerobic conditions induced by the flooding of paddies. Under both land-use types, the maximal contribution of plant residues to SOC is at intermediate mean annual temperature (15–20°C), neutral soil (pH~7.3), and low clay/sand ratio. By contrast, high temperature (~24°C), low soil pH (~5), and large clay/sand ratio are favorable for strengthening the contribution of microbial necromass. The greater contribution of microbial necromass to SOC in waterlogged paddies in warmer climates is likely due to the fast anabolism from bacteria, whereas fungi are unlikely to be involved as they are aerobic. In the scenario of land-use conversion from paddy to upland, a total of 504 Tg C may be lost as CO2 from paddy soils (0–15 cm) solely in eastern China, with 90% released from the less protected plant-derived C. Hence, preserving paddy systems and other anthropogenic wetlands and increasing their C storage through sustainable management are critical for maintaining global soil C stock and mitigating climate change.
AB - Paddy soils make up the largest anthropogenic wetlands on earth, and are characterized by a prominent potential for organic carbon (C) sequestration. By quantifying the plant- and microbial-derived C in soils across four climate zones, we identified that organic C accrual is achieved via contrasting pathways in paddy and upland soils. Paddies are 39%–127% more efficient in soil organic C (SOC) sequestration than their adjacent upland counterparts, with greater differences in warmer than cooler climates. Upland soils are more replenished by microbial-derived C, whereas paddy soils are enriched with a greater proportion of plant-derived C, because of the retarded microbial decomposition under anaerobic conditions induced by the flooding of paddies. Under both land-use types, the maximal contribution of plant residues to SOC is at intermediate mean annual temperature (15–20°C), neutral soil (pH~7.3), and low clay/sand ratio. By contrast, high temperature (~24°C), low soil pH (~5), and large clay/sand ratio are favorable for strengthening the contribution of microbial necromass. The greater contribution of microbial necromass to SOC in waterlogged paddies in warmer climates is likely due to the fast anabolism from bacteria, whereas fungi are unlikely to be involved as they are aerobic. In the scenario of land-use conversion from paddy to upland, a total of 504 Tg C may be lost as CO2 from paddy soils (0–15 cm) solely in eastern China, with 90% released from the less protected plant-derived C. Hence, preserving paddy systems and other anthropogenic wetlands and increasing their C storage through sustainable management are critical for maintaining global soil C stock and mitigating climate change.
KW - biomarker approach
KW - carbon sequestration
KW - climate zone
KW - lignin phenol
KW - microbial necromass
KW - paddy and upland
UR - http://www.scopus.com/inward/record.url?scp=85102948949&partnerID=8YFLogxK
U2 - 10.1111/gcb.15595
DO - 10.1111/gcb.15595
M3 - Article
C2 - 33713528
AN - SCOPUS:85102948949
VL - 27
SP - 2478
EP - 2490
JO - Global change biology
JF - Global change biology
SN - 1354-1013
IS - 11
ER -