Crescimento e produtividade de cultivares de milho sob densidades de semeadura.

Abstract

One of the most important crops to obtain high yields of grains and forage in maize crop is the correct management of seed density, since the plant stand can affect the growth components and influence the production and partition of photoassimilates. The objective of this study was to evaluate the growth and yield of maize, using five population densities, using two cultivars. The experiment was carried out at the experimental farm of Campina Grande Federal University, CCTA / UFCG, Campus of Pombal, located in the city of São Domingos-PB. The experimental design was a randomized complete block design (5 x 2), with five planting densities (24, 30, 40, 60 and 121 thousand plants per hectare) and two cultivars (AG - 1051 and BR-106) with four replicates. The components of crop growth, forage yield and productivity were evaluated, where the density of 40,000 ha-1 plants was the best for the growth components, with a density of 121,000 plants / ha-1 positive for forage. No interference of planting densities on crop productivity was observed with cultivar AG - 1051, presenting higher results as a function of sowing density.