The objective of this study was to evaluate the performance of hybrid maize inoculated with Azospirillum brasilense under different levels of topdressing nitrogen. The experiment was conducted under field conditions in the conventional tillage system, in the experimental station of the Federal Institute Goiano (Rio Verde, GO), in the 2012 crop season. The parameters evaluated were: ear mass; cob mass; ear length, ear diameter, ear grain weight and total weight per plot. The experimental design was randomized blocks with four replications. The treatments were arranged in a factorial arrangement 1 x 2 x 5, with one hybrid (DKB 390 YG RR2), absence and presence of inoculation with A. brasilense and five doses of N (0, 25, 50, 75 and 100%) totaling 40 plots and 640 m2. The experimental data were subjected to analysis of variance by test F, and when significant the means were compared by Tukey test at 5% probability. The optimal dose of nitrogen applied at top dress in the maize inoculated was approximately 89% of the recommended dose, which may range up to 84% without significant loss in yield or in the effect of A. brasilense.

A B S T R A C TThe objective of this study was to evaluate the performance of the common bean crop grown with application of osmoprotectants based on algae of the genus Durvillaea potatorum in the winter crop season, with occurrence or not of water suppression. The experiment used a randomized block design, in split plots, arranged in a 4x7 factorial scheme, in which the plots were composed of four treatments -periods of water suppression (7, 14, 21 days and the control treatment: 100% of field capacity throughout the crop cycle) and the subplots consisted of seven types of osmoprotectants. The treatments with osmoprotectants was applied during the full flowering of the common bean. Three days after application of osmoprotectants, the treatments with suppression of irrigation were established. The use of osmoprotectants based on algae of the genus Durvillaea does not affect the variables plant height, stem diameter, stem and pod dry matter, first pod height, number of pods per plant and number of grains per pod in common bean plants cultivated with occurrence of water suppression. Common bean plants under water restriction conditions have lower leaf and shoot dry matter and lower 100-grain weight. Common bean grain yield was influenced by the type of osmoprotectants and the water suppression period.

RESUMOO experimento foi desenvolvido em condições de campo, na estação experimental do Instituto Federal Goiano -Campus Rio Verde, Estado de Goiás. Objetivou-se avaliar o desempenho de cultivares e linhagens de amendoim (Arachis hypogaea L) no período de inverno, sob sistema de irrigação, visando à utilização deste material como alternativa para a entressafra. Aplicou-se uma lâmina de 700 mm, utilizando aspersores convencionais. As parcelas experimentais, foram constituídas de 5 linhas, espaçadas a 0,5 m com 4,0 m de comprimento (10 m²), com 12 plantas/m², com população de 240.000 plantas/ha -1 . Os tratamentos foram compostos por três cultivares (T1= BR-1, T2= BRS Havana, T3= Tatu) e three linhagens (T4= 184 AM, T5= 283 AM, T6= 298 AM), oriundas do Programa de Melhoramento de Amendoim da Embrapa, exceto a cultivar Tatu (IAC). O Delineamento experimental utilizado foi em blocos ao acaso, com 6 tratamentos e 4 repetições.Os dados experimentais foram submetidos à análise da variância, as médias comparadas entre si pelo teste Tukey a 5% de probabilidade, utilizando-se SISVAR. O tratamento que mais se destacou quanto ao rendimento de grãos e produtividade foi o 283 AM. Palavras chave: Arachis hypogaea L., melhoramento, irrigação.

RESUMOObjetivou-se nesse trabalho avaliar a resposta do feijão azuki irrigado por aspersão, às doses crescentes de adubação nitrogenada em cobertura em um solo vermelho distroférrico. O experimento foi desenvolvido nas condições de campo, na estação experimental do Instituto Federal Goiano -Câmpus Rio Verde -GO. Os tratamentos empregados foram: 0, 25, 50, 100 e 150 kg de N ha -1 , em cobertura. Cada um dos tratamentos foi submetido a regimes de 100% de irrigação, aplicou-se a quantidade de água necessária para o pleno desenvolvimento da cultura, baseando em uma lâmina de 500 mm. O delineamento experimental foi o de blocos ao acaso com 5 tratamentos e 4 repetições. Cada unidade experimental apresentou parcelas de 4,0 m de comprimento por 3,0 m de largura (12,0 m 2 ), com sete linhas espaçadas a 0,50 m. Foram avaliadas as cinco linhas centrais, com área útil de (10,0 m 2 ). A maior produtividade foi alcançada com o tratamento 100 Kg N ha -1 .Palavras-chave: componentes produtivos, fertilizantes químicos, produtividade. RESPONSE TO BEAN AZUKI NITROGEN IN IRRIGATION ABSTRACTThe experiment was conducted under field conditions, at the experimental station of the Federal Institute Goiano -Campus Rio Verde -GO. The treatments were the doses of 0, 25, 50, 100 and 150 kg N ha -1 , in coverage. The N source used was the Urea. Each one of the treatments was submitted to regimes of 100% of irrigation, it was applied to the quantity of water required for the full development of crop, based on a depth of 500 mm. The experimental design was a randomized complete block with 5 treatments and 4 repetitions.

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