Avaliação do potencial produtivo do milho híbrido AGN-30A06 em espaçamentos e populações diferenciadas

Abstract

Evaluation of mayze potential productivity (hybrid AGN-30A06) using different row spacing and plant population density With the purpose of evaluating the mayze potential yield (hybrid AGN-30A06) using different row spacing and plant population, in addition to analyzing the grain bromatological index and verifying the nitrogen management effect, a field experiment was carried out at 'Escola Agrotécnica Federal de Concórdia', in Concórdia, State of Santa Catarina, Brazil, using the randomized block design (split-plot) with two replications. The following spacing between plant rows were used: 0.45 m, 0.60 m and 0.80 m with populations of 60,000, 70,000 and 80,000 plants per hectare. The higher values of grain productivities were obtained with the spacing between plant rows of 0.45 m. Among the three plant densities, 80,000 plants per hectare with spacing between plant rows of 0.45 m provided a better result. This indicates that it is possible to increase grain yield increasing plant density under reduced spacing between plant rows. Related to the bromatology, it was verified that: (i) high level of fertilization results higher oil content, lower protein content, better quality of grain and lower incidence of diseases and (ii) low level of fertilization results higher protein content, lower oil content and greater amount of damaged grains.