Skip to main content
ARS Home » Research » Publications at this Location » Publication #74180
Title: NUTRIENT DIGESTIBILITY IN DOGS FED DIFFERING FIBER TYPES

Author
item SILVIO, J. - UNIVERSITY OF KENTUCKY
item HARMON, D. - UNIVERSITY OF KENTUCKY
item GROSS, K. - HILL'S PET NUTRITION,KS
item McLeod, Kyle

Submitted to: Journal of Animal Science
Publication Type: Abstract Only
Publication Acceptance Date: 7/24/1996
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Eight mature dogs (17.2 + .2 kg), surgically fitted with ileal T-cannulas, were used to evaluate nutrient disappearance at the terminal ileum and through the digestive tract. Two fiber types, cellulose (CELL), a crystalline slowly fermented fiber and pectin (PEC), a soluble rapidly fermented fiber, were fed in various increments and the effects on nutrient tavailability were assessed. Treatments included 1) 100% CELL, 2) 66% CELL and 33% PEC, 3) 66% PEC and 33% CELL, and 4) 100% PEC. Fiber was added at 7.5% of diet DM. Diets were fed at 100% of ME for maintenance and offered at 0730 and 1730. Ileal samples were obtained hourly between the a.m. and p.m. feedings over a 3 d period. Daily DMI was 210 + 5 g/d. Dry matter disappearance measured at the ileum was unaffected (P > .10) by treatment. Total tract and large intestinal DM digestibility increased linearly (P < .01) with increased PEC (81.3, 84.0, 85.4, and 88.3% and 10.4, 12.1, 28.4, and 43.3%, respectively). Ileal and large intestinal ADF disappearance increased linearly (P < .01) with increased PEC (12.4, 14.6, 38.6, and 66.0% and 41.6, 50.4, 65.9, and 84.5%, respectively). Total tract ADF disappearance also increased linearly (P < .01) with increased PEC (48.8, 57.8, 78.8, and 94.1%, respectively). Total tract energy disappearance increased linearly (P < .01) with increased PEC (84.3, 86.5, 87.1, and 89.2%, respectively). Ileal N disappearance was similar for all treatments (P > .10). Total tract N disappearance decreased linearly (P < .01) with increased PEC (83.0, 80.7, 75.3, and 73.6%, respectively). Pectin decreased apparent N digestibility. The lower N disappearance could be attributed to greater microbial N excretion as a result of greater fermentation of PEC compared with CELL.