Xilanase e beta-glucanase SOBRE O DESEMPENHO E CARACTERÍSTICAS DE CARCAÇA DE CORDEIROS MESTIÇOS SANTA INÊS

Abstract

Sheep farming has been improved to meet the demands of the current market. The objective of this study was to evaluate the influence of the use of the enzymes xylanase and beta-glucanase on the performance and carcass characteristics of Santa Inês lambs confined to diets with high inclusion of concentrated feed. The experiment took place in the confinement shed of the Laboratory of Teaching and Research of Goats and Sheep of IF Goiano, Campus Rio Verde. Sixteen male lambs were used, aged between three and five months and with an average initial weight of 20 kg. The animals were confined in individual pens for 40 days, after adaptation. The diets had a roughage: 10:90 concentrate ratio. The experimental design was in randomized blocks, with four treatments in which T1 = control, where there was no inclusion of enzymes; T2 = 1 g; T3 = 1.5 g; and, T4 = 2 g of fibrolytic enzymes / kg DM, all with four replications. The analysis of performance and carcass characteristics took place using the software R Core Team version 4.0.2 (2020). The inclusion of enzymes, in the amount studied, did not provide any difference in the lambs' weight gain as well as in the carcass characteristics analyzed. The addition of enzymatic additive as a substrate in diets of Santa Inês crossbred lambs under confinement did not influence performance and carcass characteristics.