Sistemas de alimentação na terminação de bovinos.

Abstract

The objective of this work was to evaluate the consumption, performance, carcass characteristics, ingestive behavior and blood metabolic profile as a function of finishing strategies of cattle in pastures in the dry season, using whole or ground corn grains and different forms of adaptation to diets. The experimental design was a completely randomized design with seven treatments and nine replicates (animals), evaluating the quantitative characteristics of the carcass, physical composition of the carcass, average daily gain (GMD), blood parameters and three repetitions (pickets) for consumption Of dry matter of the concentrate (CMSc), seven treatments and three replicates (animals) were evaluated for the study of ingestive behavior. The experimental period was 84 days. Non-orthogonal contrasts were performed to evaluate responses to treatments. When comparing the supply of supplements at will with restricted supply, slaughter weight (PA) (P = 0.01), warm carcass weight (PCQ) (P = 0.03), cold carcass weight (PCF) ( P = 0.01), muscle (M) (P = 0.02), fat (G) (P = 0.02), GMD (P = 0.07), WHR (P = 0.03) (P = 0.02), CMSc, kg / day (P = 0.05), were higher when the animals were fed supplements at will. The animals kept under conditions of confinement differed statistically in the levels of glucose (P = 0.05), cholesterol (P = 0.03) and triglycerides P (= 0.02) in relation to those kept on pasture, with animals grazing with the highest concentrations. The use of higher levels of supplementation regardless of the type of processing in the dry season reduces grazing time, rumination and increases feeding, leisure and other activities.