HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Interpretive Summary Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Kononoff, P. J. Articles by Klopfenstein, T. J. Search for Related Content PubMed PubMed Citation Articles by Kononoff, P. J. Articles by Klopfenstein, T. J.

Estimation of the Proportion of Feed Protein Digested in the Small Intestine of Cattle Consuming Wet Corn Gluten Feed¹

Department of Animal Science, University of Nebraska-Lincoln, Lincoln, 68583-0908

² Corresponding author: pkononoff2{at}unl.edu

The objectives of this study were to expand the database and determine the intestinal digestibility of rumen undegradable protein (dRUP) of common dairy feeds and to determine the effects of feeding 37.9% wet corn gluten feed on these estimates. Two ruminally and duodenally fistulated steers were assigned randomly to a crossover design with 4-wk periods. The mobile bag technique was used to determine rumen undegradable protein (RUP), dRUP, total tract digestible protein, and total tract digestible dry matter of alfalfa hay, brome hay, alfalfa haylage, corn silage, whole cottonseed, soybean meal, soyhulls, ground corn, nonenzymatically browned soybean meal, and dried distillers grains. There was no consistent effect of diet on RUP, dRUP, total tract digestible protein, and total tract digestible dry matter. The RUP (% of crude protein) ranged from 5.97% for alfalfa haylage to 75.6% for nonenzymatically browned soybean meal. The dRUP ranged from 15.3% for alfalfa haylage to 96.5% for nonenzymatically browned soybean meal. The dRUP for alfalfa hay (33.9%), brome hay (39.1%), alfalfa haylage (15.5%), and corn silage (19.9%) were lower than National Research Council reported values. The higher dRUP of the nonenzymatically browned soybean meal is reflective of more total protein reaching the small intestine. The large range in dRUP was not reflected in total tract digestible protein (% of crude protein), with corn silage being the lowest at 85.2% and nonenzymatically browned soybean meal the highest at 97.9%. In this study, diet had little effect on intestinal digestibility of protein or dry matter.

Key Words: mobile bag • intestinal digestibility • rumen undegradable protein

This article has been cited by other articles:

				S. E. Boucher, S. Calsamiglia, C. M. Parsons, H. H. Stein, M. D. Stern, P. S. Erickson, P. L. Utterback, and C. G. Schwab Intestinal digestibility of amino acids in rumen-undegraded protein estimated using a precision-fed cecectomized rooster bioassay: II. Distillers dried grains with solubles and fish meal J Dairy Sci, December 1, 2009; 92(12): 6056 - 6067. [Abstract] [Full Text] [PDF]

				M. E. Corrigan, T. J. Klopfenstein, G. E. Erickson, N. F. Meyer, K. J. Vander Pol, M. A. Greenquist, M. K. Luebbe, K. K. Karges, and M. L. Gibson Effects of level of condensed distillers solubles in corn dried distillers grains on intake, daily body weight gain, and digestibility in growing steers fed forage diets1 J Anim Sci, December 1, 2009; 87(12): 4073 - 4081. [Abstract] [Full Text] [PDF]

				S. E. Boucher, C. Pedersen, H. H. Stein, and C. G. Schwab Evaluation of the furosine and homoarginine methods for determining reactive lysine in rumen-undegraded protein J Dairy Sci, August 1, 2009; 92(8): 3951 - 3958. [Abstract] [Full Text] [PDF]

				C. R. Mullins, K. N. Grigsby, and B. J. Bradford Effects of alfalfa hay inclusion rate on productivity of lactating dairy cattle fed wet corn gluten feed-based diets, J Dairy Sci, July 1, 2009; 92(7): 3510 - 3516. [Abstract] [Full Text] [PDF]

				K. J. Hubbard, P. J. Kononoff, A. M. Gehman, J. M. Kelzer, K. Karges, and M. L. Gibson Short communication: The effect of feeding high protein distillers dried grains on milk production of Holstein cows J Dairy Sci, June 1, 2009; 92(6): 2911 - 2914. [Abstract] [Full Text] [PDF]

				B. N. Janicek, P. J. Kononoff, A. M. Gehman, and P. H. Doane The Effect of Feeding Dried Distillers Grains Plus Solubles on Milk Production and Excretion of Urinary Purine Derivatives J Dairy Sci, September 1, 2008; 91(9): 3544 - 3553. [Abstract] [Full Text] [PDF]

				G. I. Zanton and A. J. Heinrichs Analysis of Nitrogen Utilization and Excretion in Growing Dairy Cattle J Dairy Sci, April 1, 2008; 91(4): 1519 - 1533. [Abstract] [Full Text] [PDF]