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Arquivo Brasileiro de Medicina Veterinária e Zootecnia
On-line version ISSN 1678-4162
BORBUREMA, J.B. et al. Effect of diet on the metabolic profile of Santa Inês sheep feedlot. Arq. Bras. Med. Vet. Zootec. [online]. 2012, vol.64, n.4, pp.983-990. ISSN 1678-4162. http://dx.doi.org/10.1590/S0102-09352012000400027.
The objective of this study was to evaluate the metabolic profile of 40 Santa Inês sheep, whole, with average weight of 17±1,7kg, submitted to food restriction followed by refeeding in confinement, distributed in four treatments: 0, 20, 40 and 60% restriction food. Two tests were developed, one for restriction and one for refeeding. In this experiment a completely randomized design was used, with four treatments and 10 repetitions, distributed in a factorial 4x3 crossover. In the constraint phase it was observed that phosphorus levels were higher in animals under food restriction, this also occurred in the final stage for of total protein (TP), albumin (Alb) and total cholesterol concentrations. The gamma-glutamyl transferase (GGT) decreased linearly with increasing restriction. On the second trial it was found that concentrations of PT, Alb, globulin, total cholesterol, high density lipoprotein, GGT and Mg were similar (P<0,05) between collection periods. In the previous restriction, a decreasing linear behavior and interaction treatment for GGT versus collection period for the concentration of calcium was observed. The levels of food restriction affect protein metabolism and did not interfere with energy metabolism, and feedback resulted in changes in protein, energy and mineral metabolism.
Keywords : lamb; compensatory growth; enzymes; minerals.