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On the occasion of
WORLD SOIL DAY 2024,
Join us for our FREE webinar:
Direct evidence on the impact of
organic amendments on carbon stabilization in soil microaggregates
The Intergovernmental Panel on Climate Change has identified carbon (C) sequestration in soils/vegetation through agriculture, forestry, and other land uses as an important strategy with substantial potential to reduce atmospheric carbon dioxide concentrations (Smith et al., 2014). In the agricultural sector, soil organic carbon (SOC) management is considered a nature-based carbon dioxide removal technology that simultaneously improves soil quality, agriculture productivity, and resilience to extreme climatic conditions (Rumpel et al., 2020; Weng et al., 2022). From the hypothesis that the long-term addition of compost/manure can distinctly influence SOC stabilization, the primary aim of the research undertaken was to determine the soil carbon stabilization mechanisms involved and their impact.
Amongst the core ideas developed from this research, it was found that:
- Microbial-derived carbon (C) was found in microaggregates from manure-/ compost-added soils. Continuous addition of organic amendments enhances organic carbon (OC) stabilization in soil microaggregates, via enhancing microbial/extracellular enzyme activities, reactive mineral composition, and aggregation.
- Overall, this study has provided direct/indirect evidence for the complex and interactive involvement of chemical, mineralogical, and biological mechanisms that may have been stimulated by the long-term addition of compost/manure in stabilizing SOC.
Presented by:
Dr. Ganga M. Hettiarachchi
Department of Agronomy, Kansas State University
Research Team includes:
Pavithra S. Pitumpe Arachchige, Ecoresolve;
Leila Maurmann, Kansas Department of Health and Environment;
Charles W. Rice, Department of Agronomy, Kansas State University
James J. Dynes, Canadian Light Source Inc.,
Leila Maurmann, Department of Chemistry, Kansas State University
A.L. David Kilcoyne, Advanced Light Source,
Lawrence Berkeley National Laboratory
Chammi P. Attanayake, Institute for Sustainability, Energy, and Environment, University of Illinois Urbana-Champaign
THURSDAY DECEMBER 5, 2024 @ 3pm EST
ABOUT DR. GANGA M. HETTIARACHCHI ---
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