| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
ANIMAL NUTRITION |
* Department of Animal Sciences and
and
Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN and
and
Danisco Animal Nutrition, Marlborough, Wiltshire, U.K.
3 Correspondence—phone: 765-494-4848; fax: 765-494-9346; e-mail: ladeola{at}purdue.edu.
Abstract
This study was designed to quantify the effect of soyhulls on N and AA digestibilities of soybean meal for growing pigs. Soyhulls were incorporated into 17% CP diets containing 33.25% soybean meal (SBM) at 0, 3, 6, or 9% (as-fed basis) and fed to 35-kg barrows to determine their effect on apparent and true digestibility of DM, GE, N, and AA measured at the terminal ileum. Positive and negative control diets containing 1.05% lysine were formulated with 35% SBM and 27% soy protein concentrate (SPC), respectively. A low-protein, casein-based diet was used to estimate endogenous AA losses. Soyhulls were incorporated into experimental diets at the expense of cornstarch, and SBM levels were adjusted to accommodate the contribution of CP from soyhulls. Fourteen pigs were surgically fitted with simple T-cannula at the distal ileum and fed the seven semipurified cornstarch diets based on a replicated 7 x 7 Latin square design. Each period lasted 7 d, with diet acclimation from d 1 to 5 and ileal sample collection for 12 h on d 6 and 7. Feed was offered at a level of 90 g/kg BW0.75 in two equal portions at 0800 and 2000. Apparent ileal digestibilities of DM and GE decreased approximately six percentage units with the addition of soyhulls (linear, P < 0.05), whereas N was not affected. Both apparent and true ileal digestibilities of arginine, histidine, lysine, phenylalanine, aspartic acid, serine, and tyrosine also exhibited a decrease (linear, P < 0.05) of up to five percentage units with the addition of soyhulls. True ileal lysine digestibility of SBM decreased from 90.3 to 87.7% with the addition of 9% soyhulls. The endogenous nutrient fraction measured at the distal ileum was rich in proline, glutamic acid, and glycine, with losses greater than 1,000 mg/kg of DMI for each AA, and contained minimal amounts of tryptophan, methionine, and cystine. The current data suggest that a 0.2% decrease in some true ileal indispensable AA digestibilities may result with each 1% increase in soyhull inclusion in semipurified diets containing SBM as the sole source of AA as fed to growing pigs.
Key Words: Amino Acids • Cannulation • Digestibility • Pigs • Soybean Meal • Soyhulls
This article has been cited by other articles:
|
|
 |
|
  T. M. Hill, H. G. Bateman II, J. M. Aldrich, and R. L. Schlotterbeck Effects of Feeding Different Carbohydrate Sources and Amounts to Young Calves J Dairy Sci, August 1, 2008; 91(8): 3128 - 3137. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. A. Roberts, H. Xin, B. J. Kerr, J. R. Russell, and K. Bregendahl Effects of Dietary Fiber and Reduced Crude Protein on Nitrogen Balance and Egg Production in Laying Hens Poult. Sci., August 1, 2007; 86(8): 1716 - 1725. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 E. K. D. Nyannor, S. A. Adedokun, B. R. Hamaker, G. Ejeta, and O. Adeola Nutritional evaluation of high-digestible sorghum for pigs and broiler chicks J Anim Sci, January 1, 2007; 85(1): 196 - 203. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. J. Bruce, L. K. Karr-Lilienthal, K. E. Zinn, L. L. Pope, D. C. Mahan, N. D. Fastinger, M. Watts, P. L. Utterback, C. M. Parsons, E. O. Castaneda, et al. Evaluation of the inclusion of soybean oil and soybean processing by-products to soybean meal on nutrient composition and digestibility in swine and poultry J Anim Sci, June 1, 2006; 84(6): 1403 - 1414. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
F. O. Opapeju, A. Golian, C. M. Nyachoti, and L. D. Campbell Amino acid digestibility in dry extruded-expelled soybean meal fed to pigs and poultry J Anim Sci, May 1, 2006; 84(5): 1130 - 1137. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. N. Dilger and O. Adeola Estimation of true phosphorus digestibility and endogenous phosphorus loss in growing pigs fed conventional and low-phytate soybean meals J Anim Sci, March 1, 2006; 84(3): 627 - 634. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. H. Stein, C. Pedersen, A. R. Wirt, and R. A. Bohlke Additivity of values for apparent and standardized ileal digestibility of amino acids in mixed diets fed to growing pigs J Anim Sci, October 1, 2005; 83(10): 2387 - 2395. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
V. Moter and H. H. Stein Effect of feed intake on endogenous losses and amino acid and energy digestibility by growing pigs J Anim Sci, December 1, 2004; 82(12): 3518 - 3525. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. K. Karr-Lilienthal, N. R. Merchen, C. M. Grieshop, M. A. Flahaven, D. C. Mahan, N. D. Fastinger, M. Watts, and G. C. Fahey Jr. Ileal amino acid digestibilities by pigs fed soybean meals from five major soybean-producing countries J Anim Sci, November 1, 2004; 82(11): 3198 - 3209. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
