JDS
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
 QUICK SEARCH:   [advanced]


     


Journal of Dairy Science Vol. 73 No. 8 2143-2156
© 1990 by American Dairy Science Association ®
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Colucci, P. E.
Right arrow Articles by Barney, D. J.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Colucci, P. E.
Right arrow Articles by Barney, D. J.

Digesta Kinetics in Sheep and Cattle Fed Diets with Different Forage to Concentrate Ratios at High and Low Intakes

P. E. Colucci 1, G. K. Macleod 1, W. L. Grovum 1, I. McMillan 1, and D. J. Barney 1

1 University of Guelph, Guelph, ON, Canada N1G 2W1

Effect of maintenance and ad libitum intakes on digesta kinetics was studied with six ruminally fistulated cows and six ruminally fistulated wethers to validate the use of sheep as a model of cattle. Complete diets were made up of ratios of alfalfa:cracked corn and soybean meal of 80:20, 55:45, and 30:70. The rate of passage of Cr-mordanted alfalfa and soybean meal in the reticulorumen was negatively related to percentage of concentrate in the diet in both species at low intakes. Passage values of particulate and liquid markers were faster at high than at low intakes in both species for all diets. Rumen liquid volume increased with intake only in the cows on the low and intermediate concentrate diets.

No substantial differences were found in particulate passage values between sheep and cattle. However, liquid passage rates from the m e n and the differentials between liquid and particulate dilution rates were higher in cows than in sheep for all diets at both intakes. These results together with those for digestibility data reported in a previous communication suggest that caution should be exercised when extrapolating results from one species to the other.

Key Words: digesta kinetics • sheep and cattle • intake

Submitted on June 8, 1989
Accepted on March 7, 1990




This article has been cited by other articles:


Home page
J DAIRY SCIHome page
S. Seo, L. O. Tedeschi, C. G. Schwab, B. D. Garthwaite, and D. G. Fox
Evaluation of the passage rate equations in the 2001 Dairy NRC model.
J Dairy Sci, June 1, 2006; 89(6): 2327 - 2342.
[Abstract] [Full Text] [PDF]


Home page
J ANIM SCIHome page
S. M. Shellito, M. A. Ward, G. P. Lardy, M. L. Bauer, and J. S. Caton
Effects of concentrated separator by-product (desugared molasses) on intake, ruminal fermentation, digestion, and microbial efficiency in beef steers fed grass hay
J Anim Sci, June 1, 2006; 84(6): 1535 - 1543.
[Abstract] [Full Text] [PDF]


Home page
J ANIM SCIHome page
A. Cannas, L. O. Tedeschi, D. G. Fox, A. N. Pell, and P. J. Van Soest
A mechanistic model for predicting the nutrient requirements and feed biological values for sheep
J Anim Sci, January 1, 2004; 82(1): 149 - 169.
[Abstract] [Full Text] [PDF]


Home page
J ANIM SCIHome page
K. A. Guay, H. A. Brady, V. G. Allen, K. R. Pond, D. B. Wester, L. A. Janecka, and N. L. Heninger
Matua bromegrass hay for mares in gestation and lactation
J Anim Sci, November 1, 2002; 80(11): 2960 - 2966.
[Abstract] [Full Text] [PDF]




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1990 by the American Dairy Science Association ®.