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Kim K, Juyal A, Kravchenko A. Soil pore characteristics and the fate of new switchgrass-derived carbon in switchgrass and prairie bioenergy cropping systems. Sci Rep 2024; 14:7824. [PMID: 38570696 PMCID: PMC10991283 DOI: 10.1038/s41598-024-58444-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 03/29/2024] [Indexed: 04/05/2024] Open
Abstract
Monoculture switchgrass and restored prairie are promising perennial feedstock sources for bioenergy production on the lands unsuitable for conventional agriculture. Such lands often display contrasting topography that influences soil characteristics and interactions between plant growth and soil C gains. This study aimed at elucidating the influences of topography and plant systems on the fate of C originated from switchgrass plants and on its relationships with soil pore characteristics. For that, switchgrass plants were grown in intact soil cores collected from two contrasting topographies, namely steep slopes and topographical depressions, in the fields in multi-year monoculture switchgrass and restored prairie vegetation. The 13C pulse labeling allowed tracing the C of switchgrass origin, which X-ray computed micro-tomography enabled in-detail characterization of soil pore structure. In eroded slopes, the differences between the monoculture switchgrass and prairie in terms of total and microbial biomass C were greater than those in topographical depressions. While new switchgrass increased the CO2 emission in depressions, it did not significantly affect the CO2 emission in slopes. Pores of 18-90 µm Ø facilitated the accumulation of new C in soil, while > 150 µm Ø pores enhanced the mineralization of the new C. These findings suggest that polyculture prairie located in slopes can be particularly beneficial in facilitating soil C accrual and reduce C losses as CO2.
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Affiliation(s)
- Kyungmin Kim
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA.
- DOE Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, USA.
- School of Integrative Plant Science, Cornell University, Ithaca, NY, USA.
| | - Archana Juyal
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
- DOE Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, USA
| | - Alexandra Kravchenko
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
- DOE Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, USA
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Han H, Li C, Liu R, Jian J, Abulimiti M, Yuan P. Warming promotes accumulation of microbial- and plant-derived carbon in terrestrial ecosystems. Sci Total Environ 2023; 905:166977. [PMID: 37716687 DOI: 10.1016/j.scitotenv.2023.166977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 09/01/2023] [Accepted: 09/08/2023] [Indexed: 09/18/2023]
Abstract
The impact of global warming on soil carbon pools has been extensively investigated, however, there is still a lack of understanding regarding the specific response of microbial- and plant-derived carbon to warming. To address this knowledge gap, we conducted a comprehensive meta-analysis of 142 studies and evaluated 986 observations comparisons of different carbon source responses to warming. Our results revealed several key insights. Firstly, climate warming resulted in an average increase of 5.46 % in the terrestrial soil carbon pool. Specifically, microbial-derived carbon showed an average increase of 6.32 %, while plant-derived carbon exhibited an average increase of 3.70 %. Secondly, while warming duration and magnitude do not significantly affect the response of microbial-derived carbon to warming, they did impact the response of plant-derived carbon. Lastly, we observed that the response of different carbon sources to warming was affected by the specific environmental backgrounds:ecosystem and climatic zone types affect the response of warming to microbial-derived carbon, while differences in climatic region affect response of warming to plant-derived carbon. The variations in the response of different soil carbon sources to warming can be attributed to the nature of the carbon source themselves, as well as the complex transformations that occur between them through microbial metabolic processes and their interactions with soil mineral particles. We suggest that interactions at the soil-plant-microbe interface should be considered more carefully, and the response of ecosystems to warming should be observed from the perspective of soil organic carbon sources, so as to better understand the response of terrestrial ecosystems carbon cycle to global warming.
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Affiliation(s)
- Huan Han
- National Engineering Technology Research Center for Desert-Oasis Ecological Construction, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Congjuan Li
- National Engineering Technology Research Center for Desert-Oasis Ecological Construction, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China.
| | - Ran Liu
- State Key Lab of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Fukang National Station of Observation and Research for Desert Ecosystem, Fukang 831505, Xinjiang, China
| | - Jinshi Jian
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, 712100, Shaanxi, China; Institute of Soil and Water Conservation, CAS & MWR, 26 Xinong Road, Yangling, Shaanxi Province 712100, PR China
| | - Madinai Abulimiti
- National Engineering Technology Research Center for Desert-Oasis Ecological Construction, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ping Yuan
- College of Resources and Environment, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China
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Qi JY, Yao XB, Duan MY, Huang XW, Fan MY, Yang Y, Luo HW, Tang XR. Effects of contrasting tillage management with straw retention on the vertical distribution of plant- and microbial-derived carbon in rice paddy. Sci Total Environ 2023:164348. [PMID: 37236452 DOI: 10.1016/j.scitotenv.2023.164348] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/08/2023] [Accepted: 05/18/2023] [Indexed: 05/28/2023]
Abstract
Soil microbial necromass is considered a persistent component of soil organic carbon (SOC), constituting the final product of the microbial carbon pump (MCP). However, the mechanisms involved in the effects of tillage and rice residue management on the vertical distribution of microbial necromass and plant residues in rice paddy soils remain unclear, limiting knowledge of SOC sequestration mechanisms. Therefore, we estimated microbial- and plant-derived C by biomarker amino sugars (AS) and lignin phenols (VSC) at the 0-30 cm soil depth, as well as their relationships with SOC contents and mineralization in a rice paddy soil under contrasting tillage practices, namely no-tillage (NT), reduced tillage (RT), and conventional tillage (CT). The results showed that the SOC contents in the rice paddy soil were positively correlated with soil AS and VSC contents. The NT resulted in significantly higher (p < 0.05) AS (expressed as per kilogram soil) at the 0-10 cm and 10-30 cm soil depths by 45-48 % than RT and CT. However, microbial-derived C and SOC mineralization were not significantly changed by NT. In contrast, the plant-derived C contents in the total SOC decreased significantly under the NT scenario, suggesting the consumption of plant-derived C even with more rice residue inputs (at the 0-10 cm soil depth). In summary, 5-year short-term NT management with more rice residue mulch on the soil surface in rice paddy maintained a low plant-derived C content, suggesting a different mode of C sequestration, except for the protection of plant-derived C under anaerobic conditions.
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Affiliation(s)
- Jian-Ying Qi
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
| | - Xiang-Bin Yao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
| | - Mei-Yang Duan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
| | - Xiang-Wen Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
| | - Mei-Yi Fan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Ya Yang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Hao-Wen Luo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
| | - Xiang-Ru Tang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China; Guangzhou Key Laboratory for Science and Technology of Fragrant Rice, Guangzhou 510642, China.
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