Título:	Pasture management in Ferralsols drives mineral-associated organic matter storage, exceeding native soil carbon stocks and enhancing cation exchange capacity.
Autoria:	BENTO, L. R. MARTIN NETO, L. SANTOS, J. V. dos FREITAS, V. da S. PEZZOPANE, J. R. M. BERNARDI, A. C. de C. OLIVEIRA, P. P. A. SCHWEIZER, S. A.
Afiliação:	LUCAS RAIMUNDO BENTO, UNIVERSIDADE DE SÃO PAULO; LADISLAU MARTIN NETO, CNPDIA; JOÃO VITOR DOS SANTOS, UNIVERSIDADE DE SÃO PAULO; VITOR DA SILVEIRA FREITAS, FUNDAÇÃO ARTHUR BERNARDES; JOSE RICARDO MACEDO PEZZOPANE, CPPSE; ALBERTO CARLOS DE CAMPOS BERNARDI, CPPSE; PATRICIA PERONDI ANCHAO OLIVEIRA, CPPSE; STEFFEN A. SCHWEIZER, TECHNICAL UNIVERSITY OF MUNICH.
Ano de publicação:	2026
Referência:	Geoderma, v. 466, 117678, 2026.
Conteúdo:	Pasture management is pivotal for enhancing soil organic carbon (SOC) storage in tropical grasslands, yet SOC recovery is often considered merely as the replenishment of historical losses following land-use change. It remains unclear whether managed Ferralsols can surpass the SOC stocks of native vegetation (NV) and which mechanisms drive such gains. We evaluated SOC pools, chemical composition, and nutrient-holding capacity after 24 years under unmanaged degraded pasture (DP) and fertilized managed pasture (MP), relative to NV. SOC storage in these systems was primarily mediated by the mineral-associated organic matter (MAOM) pool. Compared to NV, DP soils exhibited reduced MAOM stocks (119 vs. 92 Mg C ha−1), whereas MP soils stored 148 Mg C ha−1. In DP, soil acidity, low nutrient availability, and poor forage inputs induced microbial stress (as revealed by phospholipid fatty acid profiles), likely constraining MAOM formation and yielding MAOM enriched in carbohydrates with fewer carbonyl groups. In contrast, liming and fertilization in MP alleviated the Ferralsol’s low pH and nutrient deficiencies, enhancing forage yields and reducing microbial stress, likely promoting MAOM with more microbially processed signatures. NanoSIMS analyses revealed microscale organic matter patches sparsely covering clay-sized particles, indicating that SOC storage is decoupled from mineral surface area and highlighting the role of organic inputs and microbial activity in MAOM formation. Higher MAOM under MP not only increased SOC stocks but also enhanced cation exchange capacity, demonstrating that targeted pasture management can exceed native SOC stocks while improving nutrient retention.
Thesagro:	Manejo Pastagem Matéria Orgânica Estoque Carbono
NAL Thesaurus:	Tropical grasslands Best management practices Soil organic carbon Particulate organic matter Organic matter
Palavras-chave:	Ferralsolos Estoque nativo Troca catiônica Restauração de pastagem Matéria orgânica particulada Retenção de nutriente
ISSN:	1872-6259
Digital Object Identifier:	https://doi.org/10.1016/j.geoderma.2026.117678
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPPSE)