CO2 emission from soil under application of organic and mineral fertilizers under controlled conditions

Abstract

Abstract – Swine production is fundamental in Brazil and it seeks suitable use for swine slurry (SS) in agricultural areas. The objective of this study was to evaluate the effects of SS and urea application, treated or not with nitrification inhibitor (DCD) and the way of fertilizer distribution, associated or not with crop residues, on CO₂ emissions in a controlled environment. The soil used in this study was a Humic Dystrudept soil and daily and accumulated CO₂ emissions were measured. Daily CO₂ emissions increased with SS use. There was no difference considering the way the fertilizers were applied. The use of straw increased CO₂ emissions. Accumulated CO₂ emissions were higher under use of straw associated with SS.