Publicação on-line; 36 ref.; 2 tables; 2 illus.; Summary (En)

ABSTRACT

This study aimed: i) to evaluate the influence of fertilization and irrigation management on
eucalyptus plantations for soil carbon (C) dynamics; ii) to evaluate the impact of fertilization
and irrigation management on eucalyptus plantations in the C allocation in depth compared
to the Cerrado biome. This study was carried out in an eucalyptus plantation at the end of the
third rotation (7 years), which received different fertilizations and irrigations, and a Cerrado
area was used as reference. Soil samples were collected in trenches and the gases (CO2
and CH4) on the surface. The total organic carbon (TOC) is more influenced by the availability of water
than nutrients. Soils under eucalyptus stands are more efficient at C stocks in depth than the
Cerrado and act as a liquid drain of CO2 and CH4 from the atmosphere.

Keywords: CO2, CH4, carbon management index, planted forests.