Carbon Stocks in Compartments of Soil Organic Matter 31 Years after Substitution of Native Cerrado Vegetation by Agroecosystems

AUTOR(ES)

Ferreira, Eloisa Aparecida Belleza, Bustamante, Mercedes Maria da Cunha, Resck, Dimas Vital Siqueira, Figueiredo, Cícero Célio de, Pinto, Alexandre de Siqueira, Malaquias, Juaci Vitória

FONTE

Rev. Bras. Ciênc. Solo

DATA DE PUBLICAÇÃO

29/04/2016

RESUMO

ABSTRACT Changes in carbon stocks in different compartments of soil organic matter of a clayey Latossolo Vermelho Distrófico (Typic Haplustox), caused by the substitution of native savanna vegetation (cerrado sensu stricto) by agroecosystems, were assessed after 31 years of cultivation. Under native vegetation, a stock of 164.5 Mg ha-1 C was estimated in the 0.00-1.00 m layer. After 31 years of cultivation, these changes in soil C stocks were detected to a depth of 0.60 m. In the case of substitution of cerrado sensu stricto by no-tillage soybean-corn rotation, a reduction of at least 11 % of the soil C pools was observed. However, the adoption of no-tillage as an alternative to tillage with a moldboard plow (conventional system) reduced CO2 emissions by up to 12 %.

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