Características morfogênicas de cultivares de Brachiaria brizantha durante o período de diferimento

Abstract

Pasture deferment is one of the management strategies practiced to reduce the effect of seasonality of forage production during the year, so in the dry season, where forage production deficit occurs, deferment seeks to minimize the negative forage balance during the year. period of low rainfall. With this, the objective of this work was to evaluate the structural characteristics of Brachiaria brizantha cultivars during the deferment period. The work was carried out at the Capim Branco experimental farm, in the Forage Sector of the Federal University of Uberlândia. The experiment was conducted in a randomized design with three replicates. The four cultivars of Brachiaria brizantha were evaluated: marandu, xaraés, piatã and paiaguás.The rate of leaf emergence was higher in the Paiaguás grass, and presented the lifespan of smaller leaf compared tothe other cultivars.The rate of leaf elongation was greatest in grow Paiaguás than on cultivating Xaraés. The Marandu cultivar and leaf elongation rate presented Piatã, similar to the other.The culmelongation rate, leaf senescence, accumulation ofleaf and total accumulation, there were no differences amongthe cultivars. In comparison to the other cultivars, Brachiaria brizantha cv. Paiaguás presents morphogenetic features best during the period ofdeferral being, therefore a good choice for the deferment of pasture use.