ArticleFrontiers in microbiology2026
Microbial efficiency enhancement drives carbon sequestration in long-term organic farming systems: linking taxonomic succession to carbon use efficiency.
Article in Frontiers in microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Organic farming enhances soil carbon sequestration, which is a critical strategy for climate change mitigation and sustainable agriculture. However, the microbial mechanisms driving carbon accumulation in the soil, particularly the role of metabolic efficiency in long-term organic systems, remain poorly understood. We investigated microbial succession, metabolic efficiency, and carbon stabilization across an organic farming chronosequence (0-5, 5-10, and >10 years) in pepper and cabbage systems. We measured soil carbon fractions, glomalin-related soil proteins, microbial community composition, carbon use efficiency, and extracellular enzyme activities. Organic management beyond a critical 10-year threshold enhanced soil organic matter by 108% and total glomalin-related soil proteins by 4.0-fold compared with conventional farming, with no significant accumulation during the initial 5 years. This non-linear pattern corresponded with a 3.7-fold enhancement in the microbial carbon use efficiency (CUE) measured via dual-isotope approaches (
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