Avaliação produtiva da massa de forragem de híbridos de Brachiaria sob pastejo contínuo

Abstract

Pasture morphological evaluation is one way to ensure good pasture management and better animal performance. The experiment will be conducted at Fazenda Capim Branco, Federal University of Uberlândia. In this study the morphological composition of five Brachiaria hybrids will be evaluated: hybrid 152, hybrid 153, hybrid 155, hybrid 156, plus control that will be Brachiaria brizantha cv. Marandu, in a completely randomized design with 2 replicates, between the period three years. The stocking method used will be that of continuous stocking, and a grazing height of approximately 30 cm will be maintained with the vegetation height control technique, using variable stockings, where once a week the height measurement of all pastures with the use of a graduated ruler. In this measurement will be taken one hundred points per picket and then determined the average height of the grass. The accumulation rate and forage mass production of the pasture will be evaluated every 28 days, with the presence of three exclusion cages of 0.5 m2 per picket, at three random points of each experimental unit corresponding to 1.75 ha , cut to the soil level and separated manually, in two sub samples, one to determine the dry matter content (DM) and the other to separate the morphological components (leaf, stalk, dead material) for subsequent oven drying. This will be weighed and the dry matter of each component of the forage harvested in the sampling area will be calculated by means of the relationships between the dry mass and the green mass of the sub-sample.