-This study was carried out to evaluate the influence of diets supplemented with glycerin as an alternative ingredient to corn on the performance and carcass characteristics of Santa Inês confined lambs. The study involved 27 lambs aged 90 days, having an average initial weight of 26.33 ± 0.15 kg. Lambs were randomly distributed into a control group and groups with diets containing 15 and 30% glycerin in the total feed. Diet was formulated with 40% roughage and 60% concentrate.The experimental design was completely randomized, and the production performance and carcass characteristics were analyzed by analysis of variance, and the subjective carcass characteristics, by general linear models. The daily average gain was 0.21, 0.24 and 0.23 kg/day; feeding conversion was 6.39, 5.73 and 5.92 kg of diet/kg BW for control animals, and those fed with 15 or 30% glycerin, respectively, without treatment differences. Lambs were slaughtered, weighing 34 to 36 kg, and average weight of the cold carcass and commercial carcass yield were evaluated. The results were, respectively, 15.97 kg and 49.18%, for control, 15.96 kg and 48.31% for animals fed with 15% glycerin, and 15.79 kg and 47.87% for those treated with 30% glycerin, with no treatment effects. Meat tenderness and cooking loss averages were not affected by diets, with 5.07 kg and 40.45%, 5.10 kg and 40.81%, and 5.27 kg and 39.04%, respectively, for control, and those fed with 15 or 30% glycerin. Therefore, it is possible to conclude that up to 30% of medium purity glycerin in the dry matter of the diet can be used to replace corn, without any negative effect on lamb performance or carcass characteristics.

The experiment was performed with the objective of studying the ensiled sugarcane silage with 0, 5, 10, 15 and 20% of glycerin in experimental PVC silos. The aerobic stability was assessed by measuring the pH and the temperature of the silage at 0, 24, 48, 72, 96 and 120h. The chemical composition, the levels of non-fiber carbohydrates (NFC) and the total digestible nutrients (TDN) were evaluated. The in vitro digestibility of dry matter (IVDDM) and the in vitro digestibility of the cell wall (IVDCW) in the silages were evaluated. In three fistulated cattle the in situ degradability of dry matter (DM) and the disappearance percentage of the neutral detergent fiber (NDF) in samples incubated at 0, 2, 6, 12, 24, 48, 72 and 96h were analyzed. The experimental design was completely randomized and the statistical analyzes were done using Bayesian inference. Increases were observed in DM, TDN, mineral matter, NFC and reductions in NDF, acid detergent fiber, crude protein and ether extract as the inclusion of glycerin was higher. IVDDM increased (P <0.05) in silage with 15 and 20% of glycerin in relation to those with 0, 5 and 10%. The IVDCW at levels of 10, 15 and 20% of glycerin was higher (P <0.05) compared to the other treatments. Increases were observed in the soluble portion (a), a reduction in the insoluble fraction (b), and an increase in the degradability fraction constant (c) of the silages with 5, 10, 15 and 20% of glycerin (P <0.05) compared to the control. Glycerin improved aerobic stability while maintaining a low pH and temperature during the observation period at levels of 15 and 20% of glycerin against the silage with 0, 5 and 10%. These results indicate glycerin as a promising additive for sugarcane silage, being able to enhance energy density and improve the aerobic stability of the ensiled matter when its inclusion is from 10 to 20%. Key words: Energy, glycerol, in vitro digestibility, non-fibrous carbohydrates, silage pH, temperature of silage ResumoObjetivou-se estudar a silagem de cana-de-açúcar ensilada com 0, 5, 10, 15 e 20% de glicerina em silos experimentais de PVC. Avaliou-se a estabilidade aeróbia medindo-se o pH e a temperatura da massa ensilada em 0, 24, 48, 72, 96 e 120h. Avaliaram-se a composição química, os teores de carboidratos não fibrosos (CNF) e nutrientes digestíveis totais (NDT). Avaliaram-se a digestibilidade in vitro da matéria seca (DIVMS) e da parede celular (DIVPC) das silagens. Em três bovinos fistulados avaliou-se a degradabilidade in situ da matéria seca (MS) e a porcentagem de desaparecimento da fibra em detergente neutro (FDN) em amostras incubadas em 0, 2, 6, 12, 24, 48, 72 e 96h. O delineamento experimental foi inteiramente casualisado e as análises estatísticas realizadas por meio de Inferência Bayesiana. Observaram-se aumentos na MS, NDT, matéria mineral, CNF e a redução de FDN, fibra em detergente ácido, proteína bruta e extrato etéreo à medida que a inclusão da glicerina foi maior. Houve aumento na DIVMS nas silagens com 15 e 20% de glicerina em relação à...

The objective was to study the corn silage with addition of 0, 5, 10, 15 and 20% glycerin, ensiled in experimental silos of PVC. At the opening of the silos there were evaluated the chemical composition, in vitro digestibility of dry matter (IVDDM) and cell wall (IVDCW) and aerobic stability through measures of temperature and pH of silage at 0, 24, 48, 72, 96 and 120 hours. In situ degradability of dry matter, crude protein and neutral detergent fiber of silages were evaluated in fistulated cattle using samples incubated at 0, 2, 4, 6, 12, 24, 48 and 96 hours. The experimental design was completely randomized design and statistical analyzes were performed using Bayesian inference. Increases were observed in DM, mineral matter (MM), non-fibrous carbohydrates (NFC) and reductions for neutral detergent fiber (NDF), acid detergent fiber (ADF), crude protein (CP) and ether extract (EE) as the inclusion of glycerin was higher. The content of total digestible nutrients (TDN) estimated in treatments with 5, 10, 15 and 20% glycerin, were superior to the control (P<0,05) range of 2.13, 8.95, 10.33 and 13.13% respectively. The temperature and pH of the silage with 10 and 15 and 20% glycerin remained lower than those levels (P<0.05) measured during silage and 20% glycerin showed high stability after 120hours. The IVDDM and IVDCW in corn silages with 15 and 20% were higher than the other (P<0,05). The effective degradability of DM fractions in passage rates of 2, 5 and 8% / h was better in silage with 15% and 20% glycerin. Glycerin has proved to be a great additive for corn silage being able to enrich the energy density, improving the degradability of DM and maintaining the aerobic stability of silage. Key words: Digestibility of dry matter, energy, aerobic stability, glycerol, pH, temperature ResumoObjetivou-se estudar a silagem de milho ensilada com 0, 5, 10, 15 e 20% de glicerina, em silos experimentais de PVC. Foi avaliada a estabilidade aeróbia por medidas de pH e temperatura da massa ensilada (TME) às 0, 24, 48, 72, 96 e 120h. Foi avaliada a composição química e a digestibilidade in vitro da matéria seca (DIVMS) e da parede celular (DIVPC). Em três bovinos fistulados avaliou-se a degradabilidade in situ da matéria seca (MS), e a porcentagem de desaparecimento da proteína bruta (PB) e da fibra em detergente neutro (FDN) incubadas em 0, 2, 6, 12, 24, 48, 72 e 96h. O delineamento experimental foi inteiramente casualisado e as análises estatísticas realizadas por Inferência Bayesiana. Foram observados aumentos de MS, CNF, matéria mineral e a redução de FDN, PB, fibra em detergente ácido e extrato etéreo à medida que se aumentou a inclusão da glicerina. O NDT estimado nas silagens com 5, 10, 15 e 20% de glicerina, foi superior ao controle (P<0,05) variando de 2,13; 8,95; 10,33 e 13,13%, respectivamente. O pH e a TME das silagens com 10, 15 e 20% de glicerina se mantiveram inferiores (P<0,05) aos com 0 e 5% de glicerina no período avaliado, destacando-se a silagem com 20% de glicerina com maior estabilidade até 120...

Objetivou-se avaliar a inclusão de grãos de linhaça (Linum usitatissimum) na dieta de caprinos sobre o desenvolvimento corporal, características bioquímicas sanguíneas e características da carcaça de caprinos das raças Bôer e Anglonubiano. Foram divididos, aleatoriamente, 12 animais de duas raças, MORAES, G.V. et al. Desenvolvimento corporal, avaliações de carcaça e lipedimia de caprinos machos alimentados com grão de linhaça na dieta. PUBVET,