Comportamento do milheto na safrinha em função do espaçamento entre linhas e da densidade de semeadura

Abstract

The objective of this study was to evaluate, in the dry season, the influence of row spacing and seeding rate in biomass production and in other characteristics of agronomic interest of pearl millet (Pennisetum glaucum L.). The experimental design was randomized blocks in factorial scheme 4 x 2, with four repetitions: the first factor represented by row spacing (22.5; 45.0; 67.5 and 90.0 cm) and second factor represented by seeding rate (25 and 50 kg ha^-1 of seeds), in plots of 12.5 m². The pear millet sowing (was used a common cultivar), was performed manually, in march 2010. Were evaluated, in flowering, the characteristics: plant height, number of leaves of main tiller, number of tillers per plant, number of panicles, length of panicles, fresh mass and dry mass. In the second crop, the production of biomass, in the flowering, decreases as increases the row spacing in millet crop, higher biomass of production is obtained when using smaller spacing. Why other hand, higher production biomass is obtained when using largest sowing density (50 kg ha^-1 of seeds). The height of plants, the number of tillers per plant and the number of panicles contributed to obtaining of a higher biomass.