Carbon stocks in compartments of soil organic matter 31 years after substitution of native Cerrado vegetation by agroecosystems

• Autor(a) principal: Ferreira, Eloisa Aparecida Belleza
• Data de Publicação: 2016
• Outros Autores: Bustamante, Mercedes Maria da Cunha, Resck, Dimas Vital Siqueira, Figueiredo, Cícero Célio de, Pinto, Alexandre de Siqueira, Malaquias, Juaci Vitória
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UnB
• Texto Completo: http://repositorio.unb.br/handle/10482/30045; http://dx.doi.org/10.1590/18069657rbcs20150059
• topic: Plantio (Cultivo de plantas); Plantio direto; Biomassa; Matéria orgânica

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 %.