Espaçamento entre linhas na produtividade de biomassa e de grãos em genótipos de milheto pérola

Abstract

The objective of this study was to evaluate the influence of spacing between lines in yeld of biomass and grain cultivars in common and IPA-BULK 1 pearl millet. The experiment was installed at the Experimental Farm of Unioeste, located on Guará Line, Marechal Cândido Rondon - PR city. The experimental design was randomized blocks in factorial scheme 2×4, with four replications. In the treatments were used two genotypes (Usual IPA and BULK-1), conducted at four spacings (20, 40, 60 e 80cm) in plots of 12m 2. It was used as seeding rate of 25 kg ha-1 seeds for all treatments. Sowing was done manually on October 10, 2008. We evaluated the productivity of biomass and grain, and the spacing significantly influenced the production of biomass. It was observed that the biomass decreased with increasing the spacing between lines. The spacing of 20cm between rows was the, on average, increased production of green mass and dry mass at the stage of grain paste with 50.84 ton ha-1 and 17.60 ton ha-1 respectively. There was a significant interaction between the factors cultivar and spacing for the production of dry matter in the physiological maturity and grain production. In general, the cultivars has high yield of biomass and grain, so it can be grown in the region of Marechal Cândido Rondon - PR, it is an important alternative for the soil cover in tillage system and also as the power source of animals feeding. © Pleiades Publishing, Ltd., 2011.