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Evaluation of crude glycerin as a partial substitute of corn grain in growing diets for lambs

2018; Elsevier BV; Volume: 165; Linguagem: Inglês

10.1016/j.smallrumres.2018.06.002

1879-0941

Gilcifran Prestes de Andrade, Francisco Fernando Ramos de Carvalho, Ângela Maria Vieira Batista, Ricardo Alexandre Silva Pessoa, Caio Alves da Costa, Daniel Barros Cardoso, Michel do Vale Maciel,

Effects of Environmental Stressors on Livestock

This study aimed to evaluate the effects of crude glycerin addition containing 80.5% glycerol on nutrient intake, digestibility, performance and blood parameters of lambs in feedlot. We used 40 Santa Inês crossbred uncastrated male lambs, with 21 kg ± 0.8 kg initial body weight. These were designed in randomised blocks, with ten replications of each of four treatments: 0, 6, 12 and 18% crude glycerin. There was a quadratic effect (P < 0.05) on DM, CP and TDN intakes, estimating to levels of 10.9, 10.8 and 10.7% the maximum intake of 1293.76, 241.55 and 904.76 g d−1, respectively. There was a quadratic effect (P < 0.05) on the digestibility of DM, CP and NDFap, estimating the 790, 863.7 and 596.0 (g kg−1 DM) maximum digestibility in levels of 10.7, 10.6 and 10.5%, respectively. The average daily gain and feed conversion showed a quadratic effect (P < 0.05). There was a quadratic effect (P < 0.05) on serum glucose and albumin, while there was a linear increase (P < 0.05) on serum sodium concentration. There was no effect (P > 0.05) on cholesterol, triglycerides, urea, globulin, creatinine kinase, aspartate aminotransferase and gamma glutamyl transferase. The addition of crude glycerin may be included in lamb diets up to 18%.