Dados do Trabalho

Título

SOIL CARBON CONTENT IN DIFFERENT LAND USES AND MANAGEMENT SYSTEMS IN MINAS GERAIS STATE, BRAZIL

Resumo

There is currently great interest in understanding the ability of soils to accumulated carbon along the vertical soil profile, according to land use and management system. In this sense, the aim of this study was to quantify the carbon content up to 1.0 m depth in soils under three different uses in Minas Gerais state, Brazil. Soil samples were collected in three areas: integration crop-livestock-forestry (ICLF), cropland (CP) and pasture (PA). The soils were dried, sieved and macerated. The carbon content was determined by wet method in an acid medium, according to the Walkley-Black methodology. At depths of 0-10 and 20-30 cm, the soil under ICLF sequestered more carbon than the others, reaching 2.24 ± 0.60 and 1.37 ± 0.48 dag kg-1, respectively. For the depth of 10-20 cm there was no significant difference between ICLF and the pasture. For the other depths (30-50, 50-70 and 70-100 cm), the ICLF system was more efficient in carbon sequestration than the other land uses, and no significant difference was observed between soils under pasture and crop. Based on our assessment, soil under ICLF tended to sequester more carbon than soils under pasture and crop production, being a feasilble alternative for climate change mitigation.

Palavras-chave

Soil Organic Matter, Climate Change, Crop-Livestock-Forestry, Pasture, Cropland

Instituição financiadora

CNPq, RCGI e FAPEMIG

Agradecimentos

We gratefully acknowledge support of the Fundação de Amparo à Pesquisa do Estado de Minas Gerais - FAPEMIG (APQ-01712-22) and Research Centre for Greenhouse Gas Innovation - RCGI (2014/50279-4 and 2020/15230-5).