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Carlos Eduardo Gabriel Menezes
Roni Fernandes Guareschi
Marcos Gervasio Pereira
Lúcia Helena Cunha Anjos
Maria Elizabeth Fernandes Correia
Fabiano Carvalho Balieiro
Marisa de Cássia Piccolo


The objective of this work was to evaluate the soil carbon density and stock (EstC), the chemical and granulometric fractions of the organic matter and the isotopic signal of the soil δ13C in forest fragments and a mixed pasture area (MMP). The study was carried out in the municipality of Pinheiral, State of Rio de Janeiro. The evaluated areas were: fragment of secondary forest in initial stage (SFIS) with 20 years of regeneration; Fragment of secondary forest in intermediate stage (SFINS), with 25 years of regeneration; Advanced secondary forest fragment (SFAS) with 60 years of regeneration and mixed pasture (MMP). The attributes related to soil carbon showed significant responses to the effects of land degradation / recovery processes, especially for the following indicators: total organic carbon, organic matter stock and particulate organic matter. No significant alterations for humic substances, and prevalence of the humin fraction was found. The most significant changes in d13C values occurred up to the depth of 60 cm. In the grassland area, at 0-10 cm, 67% of the carbon stock comes from C4 plants, reducing in the subsequent layers. In SFINS and SFAS areas, at 0-10 cm, the contribution of C3 plants was significant, with minor changes in depth.

Article Details

Author Biographies

Carlos Eduardo Gabriel Menezes, 1 Federal Institute of Education Science and Technology of Rio de Janeiro, Brazil

IFRJ - Campus Pinheiral

Roni Fernandes Guareschi, Federal Rural University of Rio de Janeiro, Brazil

Programa de Pós-Graduação em Fitotecnia

Marcos Gervasio Pereira, Federal Rural University of Rio de Janeiro, Brazil

Departamento de Solos

Lúcia Helena Cunha Anjos, Federal Rural University of Rio de Janeiro

Departamento de Solos

Maria Elizabeth Fernandes Correia, Brazilian Agricultural Research Corporation Seropédica, Brazil

Embrapa Agrobiologia

Fabiano Carvalho Balieiro, Brazilian Agricultural Research Corporation Seropédica, Brazil

Embrapa Solos

Marisa de Cássia Piccolo, University of São Paulo