title: Effect of full-fat rice bran on palatability and digestibility of diets supplemented with enzymes in adult dogs.
abstract: Two experiments were conducted to evaluate the effect of full-fat rice bran (FFRB) inclusion in dry diets with and without enzyme blend (EB) supplementation for adult dogs. The diets contained 0, 20, or 40% of FFRB, replacing the equivalent amount of wheat flour (WF). Experiment 1 evaluated the consumption and preference of diets using a simple choice method with 3 comparisons (0 vs. 20, 0 vs. 40, and 20 vs. 40% FFRB). Experiment 2 investigated the effect of EB supplementation on the apparent digestibility coefficients (ADC) of nutrients and GE, fecal characteristics, urinary pH, Ca and P balance, and ME of the diets. In Exp. 1, the results indicated that FFRB included in diets up to 40% did not affect the preference or consumption of food by dogs (P < 0.05). In Exp. 2, increasing levels of FFRB in the diet linearly reduced the ADC of nutrients, GE, and ME (P < 0.05). The addition of EB had no effect on any of the variables examined. Regression analysis enabled estimation of the ADC in FFRB; and ADC of DM, CP, ether extract, GE; and the apparent coefficient of ME were 60.5, 74.8, 88.4, 70.8, and 66.4%, respectively. The inclusion of 20 or 40% FFRB in the diets did not affect urinary pH but caused an imbalance in the Ca and P metabolism when included at 40% (P < 0.05), which could be one of the limitations for greater inclusion of FFRB. The ME of FFRB was estimated to be 3,443 kcal/kg DM. The FFRB appears to be palatable for adult dogs, and although ADC was reduced by 40% FFRB in the diet, this ingredient has the potential for inclusion at 20% of diets for dogs, depending on the other ingredients used to achieve adequate Ca and P balance. The inclusion greater than 20% tends to increase P in the diet and reverse the relationship between Ca and P.
authors.affiliation: Department of Animal Science, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, 91540-000, Brazil.
authors.forename: G F E
authors.initials: GF
authors.lastname: Pacheco
authors.affiliation: Department of Animal Science, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, 91540-000, Brazil.
authors.forename: C S
authors.initials: CS
authors.lastname: Marcolla
authors.affiliation: Department of Animal Science, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, 91540-000, Brazil.
authors.forename: G S
authors.initials: GS
authors.lastname: Machado
authors.affiliation: Department of Animal Science, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, 91540-000, Brazil.
authors.forename: A M
authors.initials: AM
authors.lastname: Kessler
authors.affiliation: Department of Animal Science, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, 91540-000, Brazil ltrevizan@ufrgs.br.
authors.forename: L
authors.initials: L
authors.lastname: Trevizan
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004032:Diet / Q000662:veterinary*; D019587:Dietary Supplements; D004063:Digestion / Q000187:drug effects* / Q000502:physiology; D004285:Dogs / Q000502:physiology*; D005243:Feces / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D012275:Oryza / Q000737:chemistry*; D010938:Plant Oils / Q000032:analysis / Q000494:pharmacology*; D012044:Regression Analysis; D000073879:Rice Bran Oil; D014556:Urine / Q000737:chemistry
chemical_list: D010938:Plant Oils; D000073879:Rice Bran Oil
keywords: energy intake; exogenous enzymes; fiber; full-fat rice bran; phytase