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YIELD AND PRODUCTION COMPONENTS OF CORN (Zea mays L.) FOR SILAGE AS A RESULT OF NITROGEN FERTILIZATION

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Author(s): MIKAEL NEUMANN | ITACIR ELOI SANDINI | SEBASTIÃO BRASIL CAMPOS LUSTOSA | PAULO ROBERTO OST | MARCO AURÉLIO ROMANO | MARGARETE KIMIE FALBO | EDSON RODRIGO PANSERA

Journal: Revista Brasileira de Milho e Sorgo
ISSN 1676-689X

Volume: 4;
Issue: 3;
Start page: 418;
Date: 2005;
Original page

Keywords: dry matter contents: green matter production | fertilization | plant composition

ABSTRACT
The experiment was conducted to evaluate the effect of forage nitrogenfertilization levels on the yield and components of corn (Zea mays) for silage. The treatments were: T1 : 0 kg ha-1 of N; T2 : 45 kg ha-1 of N; T3 : 90 kg ha-1 of N and T4 – 135kg ha-1 of N. The regression equations for dry matter contents (DM) of bract components(35,0633 + 0,15667N – 0,00098N2) and corncob (35,8133 + 0,15778N - 0,00084N2)showed points of maximum DM with the application of 79.9 and 93.9 kg ha-1 of N,respectively. For the components stem (24.2100 + 0.0240N) and plant (38.2000 +0.0289N) there was an increase in the levels of dry matter (0.024% and 0.029%respectively) whereas for grains (52,7267 - 0,0380N) there was a decrease in DM contents(-0,038%) for each kg of nitrogen applied. It was observed a linear behavior(24.3967 +0.0422N) rising in 0,042% the participation of grains in the plant structure for each kg ofN applied. The participation of grains increased significantly, from 23,7% (0 kg ha-1 ofN) to 29,9% (135 kg ha-1 of N). The data, when submitted to the regression analysis,adjusted linearly to the level of 135 kg ha-1 of N for dry matter production (15219 +58.9493N) and green matter production (39979 + 112.9629N) demonstrated that eachkg of fertilizer increased the production by 58.95 and 112.96 kg ha-1, respectively.
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