%0 Journal Article
%T EFEITO DA APLICA  O DA UR¨¦IA EM DIFERENTES DOSES E ¨¦POCAS SOBRE UM H¨ªBRIDO DE MILHO PARA SILAGEM
%A Ant£¿nio Augusto Rocha Athayde
%J Nucleus
%D 2012
%I Funda??o Educacional de Ituverava
%X Corn has a high potential in grain production in Brazil but some factors restrict the expression of maximum yield. The achievement of economically viable products, require an adequate mineral nutrition and nitrogen is the nutrient that modulates, with greater effect this production. The objective of this study was to compare the effects of different doses and timing of urea application in coverage in the town of Bambu¨ª-MG. The work was developed in the production sector of the Federal Institute of Minas Gerais - Campus Bambu¨ª, in a Typic Dystrophic in crop year 2010/11. The experimental design was randomized blocks in split plots, with four N rates (100, 150, 200 and 250 kg N ha-1) in the plot and cover three different times (21, 28 and 35 days after planting) in the sub plot with four replications. All applications were done manually and the N source used was urea (45% N). We checked that for the hybrid AG 1051, grown in the region of Bambu¨ª for the production of silage by CFSEMG the recommended dose (1999) was sufficient to meet the nutritional demands of the hybrid and the estimated productivity gain, since there were no responses of the hybrid depending on the doses applied. In the parameters evaluated, the application time did not influence significantly the parameters evaluated, except at the time when it was applied a dose of 200 kg ha-1 where there was a greater increase in application performed at 28 days. A cultura do milho apresenta elevado potencial na produ  o de gr os, entretanto no Brasil alguns fatores restrigem a express o da capacidade m¨¢xima de produtividade da cultura. A obten  o de produtividades economicamente vi¨¢veis, demandam uma nutri  o mineral adequada e o nitrog¨ºnio ¨¦ o nutriente que, modula, com maior efeito esta produ  o. O objetivo do trabalho foi comparar os efeitos de diferentes doses e ¨¦poca de aplica  o de ur¨¦ia em cobertura, no munic¨ªpio de Bambu¨ª-MG. O trabalho foi desenvolvido no setor de produ  o do Instituto Federal de Minas Gerais - Campus Bambu¨ª, em Latossolo Vermelho Distr¨®fico, no ano agr¨ªcola 2010/11. O Delineamento experimental utilizado foi de blocos casualizados em esquema fatorial de parcelas subdivididas, sendo 4 doses de N (100, 150, 200 e 250 Kg de N ha-1) na parcela e 3 ¨¦pocas diferentes de cobertura (21, 28 e 35 dias ap¨®s o plantio) na sub parcela, com quatro repeti  es. Todas as aplica  es foram realizadas manualmente e a fonte de N utilizado foi a Ur¨¦ia (45 % N). Foram verificados que para o h¨ªbrido AG 1051, cultivado na regi o de Bambu¨ª destinado a produ  o de silagem a dose recomendada pela CFSEM
%K Fertilization. Cover. Nitrogen. Zea mays.-Aduba  o. Cobertura. Nitrog¨ºnio. Zea mays
%U http://www.nucleus.feituverava.com.br/index.php/nucleus/article/view/729/972