Search

Abstract  The purpose of this study was to evaluate, during the phenological stages of inoculated soybean crop [Glycine max (L.) Merrill], the effect of different N fertilization levels and inoculation with Bradyrhizobium japonicum on N2O emissions from the soil. Gas emissions were evaluated at field conditions by the static-chamber method. Nitrogen fertilization increased N2O emissions significantly (P?2O emissions during the whole soybean growing season was the soil nitrate level (r 2?=?0.1899; P?=?0.0231). Soil moisture presented a greater control on N2O emissions between the grain-filling period and the crop commercial maturity (r 2?=?0.5361; P?r 2?=?0.29; P?=?0.019) and moisture (r 2?=?0.24; P?=?0.039) were correlated with N2O emissions during the residue decomposition period. The relationship between soil variables and N2O emissions depended on crop phenological or stubbles decomposition stages. [ABSTRACT FROM AUTHOR]