Desempenho agronômico e forrageiro de minimilho e milho verde em diferentes épocas de semeadura e idades de corte das plantas remanescentes

Abstract

This work aimed to evaluate the agronomic and forage performance of corn and baby corn in different sowing dates and ages of cut of remaining plants in the North of Minas Gerais. Two experiments were carried out at the experimental farm of UNIMONTES, located in the Janaúba- MG, County. In both experiments, the treatments were arranged in a factorial heme 3 x 5, involving three sowing dates (August/2009, December/2009 and April/2010) and five ages of cut of remaining plants (0, 8, 16, 24 and 32 days after harvesting the spikes). The design was in randomized blocks in both experiments with four repetitions. The plots were formed by four rows of corn, spaced 0.9 m between them, with 5 m length, using the two central rows for the evaluations. The characteristics evaluated were: numbers of spikes per ha, mass of ears husked, mass of ears dehusked, yield of ears husked, yield of ears dehusked, length and diameter of dehusked ears. In the remaining plants, after harvesting the spikes, they were evaluated green and dry matter of the shoot, besides the bromatological characteristics: dry matter content, ash, ether extract, crude protein, NDF, ADF, lignin, cellulose, hemicellulose and NFC. The baby corn sowing carried through August provides greater yield of spikelets and greater production of green and dry matter of the remaining plants. There is an increment on dry matter, organic matter and NDF, and a decrease on ash and ADF of the remaining plants with the time. The sowing of the corn carried through April provides greater yield of green corn and larger production of dry matter of the remaining plants. The production of shoot dry matter of the remaining plants decreased with the advance of their cut ages.