Soil Carbon Sequestration for Mitigating Climate Change in Grasslands

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Grassland and Pasture Science".

Deadline for manuscript submissions: 30 November 2025 | Viewed by 682

Special Issue Editors


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Guest Editor
Department of Soils and Natural Resources, Faculty of Agronomy, Universidad de Concepción, Chillán, Chile
Interests: global warming; agricultural practices; nutrient cycling; biochar; organic products

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Guest Editor
Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, ON K1A 0C6, Canada
Interests: sustainable agriculture; biochemistry; innovation; environment

Special Issue Information

Dear Colleagues,

Global warming is a contemporary issue with societal, economic, and ecological consequences, posing challenges to global production systems. Grasslands, which cover approximately one quarter of the world's surface, have a significant potential to sequester carbon and reduce greenhouse gas emissions. It is important to explore various aspects of carbon sequestration in grasslands, such as the choice between legume and grass species, the impact of converting arable farmland into grassland, the management of grazing intensity, fertilization methods, amendments, biochar applications; and the restoration of degraded grasslands in diverse regions and climatic zones. We encourage research submissions for this special edition to broaden our understanding and promote strategies on this topic, thus accelerating its application across different countries.

Dr. Cristina Muñoz
Prof. Dr. Carlos Monreal
Guest Editors

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Keywords

  • grasses
  • fertilization
  • management
  • grazing
  • GHG emissions
  • C neutral systems

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Published Papers (1 paper)

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Research

16 pages, 1557 KiB  
Article
Increasing Contribution of Microbial Residue Carbon to Soil Organic Carbon Accumulation in Degraded Grasslands
by Wenbo Zhang, Guangyu Wang, Haoyu Liu, Yaoming Li, Xuexi Ma, Lianlian Fan and Jiefei Mao
Agronomy 2025, 15(4), 810; https://doi.org/10.3390/agronomy15040810 - 25 Mar 2025
Cited by 1 | Viewed by 360
Abstract
Grassland degradation driven by overgrazing, invasive species, and climate change profoundly affects the dynamics and stability of soil organic carbon (SOC), yet the molecular mechanisms underlying these changes remain unclear. This study investigated the molecular composition and origins of SOC across different degradation [...] Read more.
Grassland degradation driven by overgrazing, invasive species, and climate change profoundly affects the dynamics and stability of soil organic carbon (SOC), yet the molecular mechanisms underlying these changes remain unclear. This study investigated the molecular composition and origins of SOC across different degradation stages—native grassland (NG), weed-dominated grassland (WG), and invasive grassland (IG) dominated by Pedicularis kansuensis—in the Bayinbuluke alpine region of China. Soil samples from three depth intervals (0–10 cm, 10–20 cm, and 20–30 cm) were analyzed using gas chromatography-mass spectrometry (GC-MS) to quantify biomarkers, including free lipids, ester-bound lipids, lignin phenols, and amino sugars. Principal component analysis (PCA) was applied to assess the overall variation in SOC composition. Compared to NG, plant-derived long-chain lipids and lignin phenols in WG and IG surface soils increased by 44–90% and 68–76% (p < 0.05), respectively, while cutin content increased by 96% and 150%. However, suberin content in IG decreased by 58% across all layers (p < 0.05). Microbial-derived carbon (MRC), including bacterial and fungal residues, increased significantly in the surface layer of degraded soils (IG > WG > NG), with MRC contributions to SOC also rising markedly in the subsurface layers (10–30 cm). PCA revealed a distinct separation of SOC components along the PC1 axis, highlighting the substantial impact of degradation on SOC composition and sources. These findings emphasize the role of vegetation shifts in SOC transformation and provide insights for grassland management and restoration strategies. Full article
(This article belongs to the Special Issue Soil Carbon Sequestration for Mitigating Climate Change in Grasslands)
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