Influência de formas de adubação de semeadura na produtividade de grãos de híbridos de milho

Abstract

Understanding how the management of fertilizer application affects the production system is essential to maximize the productivity of the hybrids. The objective of this study was to verify the effect of broadcasting and banding fertilization on grain yield of 33 commercial maize hybrids in four different crop seasons. Four experiments were carried out in Serra do Salitre, state of Minas Gerais, Brazil, in November 2015, November 2016, January and February 2017. The experimental design was a randomized complete block with three replications, with treatments arranged in a 33 x 2 factorial scheme, 33 corn hybrids and two sowing fertilization forms, broadcast and band application. The joint analysis of grain yield showed significant interactions between hybrids and crop seasons, and also between fertilization systems and crop seasons. The unfolding of the interaction between the fertilization forms and crop seasons showed that the yield of grains in the band fertilization was superior compared to the broadcast fertilization, regardless the crop season evaluated. Even with the less favourable climatic conditions in the second harvest, the band fertilization showed to be more efficient when compared to the broadcast fertilization.