Analysis of the effects of different nitrogen doses and spacing on millet in northern Tocantins
DOI:
https://doi.org/10.5007/2175-7925.2010v23n4p19Abstract
The experiment was conducted at the School of Veterinary Medicine and Zootechnils, Federal University of Tocantins, in order to verify the effects of four nitrogenous manuring levels (0, 30, 60 and 120kg.ha-1) and different spacings (0.25, 0.35, 0.45 and 0.65m) on plant size, biomass and dry mass in the production of millet (Pennisetum glaucum L.). The experimental design consisted of complete blocks, with 16 treatments and four replications in a 4x4 factorial arrangement to form a total of 64 experimental units, each of 9m². The plant sizes and accumulation of biomass and dry matter were estimated weekly starting from 14 days after seeding. For the highest nitrogen level (120kg.ha-1), the biomass and dry mass production were also the highest. There were no signifi cant differences between the spacings utilized and the plant sizes at any of the phenological stages evaluated. However, the dry mass production was distinct, considering that the spacing of 0.25m presented the highest values, followed by the 0.35m, 0.45m and 0.65m spacings.
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