PERFORMANCE OF RICE GENOTYPES (Oryza sativa L.) UNDER LOW NITROGEN CONDITIONS

Abstract

Selection of rice genotypes (Oryza sativa L.) with high nitrogen use efficiency is a key technology to increase productivity and decrease the negative impact on the environment. The objective of this study was to evaluate the performance of six rice elite genotypes under low-nitrogen condition, in an Acuic Durixererts soil. The experiment was conducted using a split plot design with two N treatments (N0 and N50) and six subtreatments of rice genotypes with three replicates. Yield components, yield, agronomic characteristics, grain quality, and nitrogen agronomic efficiency (NAE) were measured. Low nitrogen conditions had not significant effects on yield components, precocity (days to 50% flowering), and perecentage of filled grain. The application of N50 resulted in significant increases in yield, with no effects on spikelet sterility. Genotypes Quila 223202, cv. Brillante and Quila 242105 showed interesting yield components and agronomic characteristics for rice production in low fertility soils.