Diferentes formas de suplementação proteica energética para bovinos de corte na época da seca

Abstract

The aim of this study was to evaluate different types of energy protein supplementation for beef cattle in the rearing phase in the dry period analyzing the metabolism, consumption and digestion. Five crossbred cannulated steers were used in the rumen, randomly divided into 1 5X5 Latin square. The experimental diets were: 1 Energy protein supplement based on sorghum meal; 2 - Energy protein supplement based on corn meal 3 - Energy protein supplement with protected fat meal 4 - MUB (solid supplementation, MUB Animal Nutrition, De Heus company) 5 TECNOBLOCK (solid block supplementation). Experimental diets were formulated according to the NRC (2016), aiming at gaining weight from 800 to 900 grams per day, being isonitrogenated. All supplement modalities had similar PB and NDT levels. MUB provided higher stability in N-NH3 and lactate concentrations, as well as better protein digestibility coefficient and better microbial synthesis efficiency, resulting in higher pasture consumption and weight gain. Thus, it was concluded that solid supplements provided better metabolic and digestive conditions, maintaining a more stable ruminal pH.