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


     

Journal of Dairy Science Vol. 76 No. 11 3490-3496
© 1993 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 CHRISTENSEN, R. A.
Right arrow Articles by CLARK, J. H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by CHRISTENSEN, R. A.
Right arrow Articles by CLARK, J. H.

Influence of Amount and Degradability of Protein on Production of Milk and Milk Components by Lactating Holstein Cows

R. A. CHRISTENSEN 1, G. L. LYNCH 1, and J. H. CLARK 1

1 Department of Animal Sciences, University of Illinois, Urbana 61801

Forty-one multiparous cows were utilized in a completely randomized design with a 2 x 2 factorial arrangement of treatments to evaluate the amount and degradability of dietary CP on production of milk and milk components. The TMR contained 25% alfalfa haylage, 25% corn silage, and 50% concentrate to provide either 16.4 or 19.4% CP with a calculated ruminal degradability of 55 or 70%. Intakes of DM, ADF, and NDF and BW were not different among treatments. Production of milk, 4% FCM, fat, CP, and SNF was not affected by amount or degradability of dietary CP. Milk CP percentage was not affected significantly by amount or degradability of CP. Milk fat percentage was increased by the diet that was high in ruminally undegradable protein (2.90 and 3.12; low and high ruminally undegradable protein, respectively). These data suggest that synthesis of milk and milk components was not limited by a shortage of AA or that the different dietary sources of supplemental CP did not alter AA availability.

Key Words: protein degradability • milk production and composition • dairy cows • ruminally undegradable protein

Submitted on December 23, 1992
Accepted on June 1, 1993




This article has been cited by other articles:


Home page
 J DAIRY SCIHome page
I. R. Ipharraguerre and J. H. Clark
Varying Protein and Starch in the Diet of Dairy Cows. II. Effects on Performance and Nitrogen Utilization for Milk Production
J Dairy Sci, July 1, 2005; 88(7): 2556 - 2570.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
I. R. Ipharraguerre and J. H. Clark
Impacts of the Source and Amount of Crude Protein on the Intestinal Supply of Nitrogen Fractions and Performance of Dairy Cows
J Dairy Sci, May 1, 2005; 88(e_suppl_1): E22 - E37.
[Abstract] [Full Text] [PDF]

Home page
 J ANIM SCIHome page
A. N. Hristov, R. P. Etter, J. K. Ropp, and K. L. Grandeen
Effect of dietary crude protein level and degradability on ruminal fermentation and nitrogen utilization in lactating dairy cows
J Anim Sci, November 1, 2004; 82(11): 3219 - 3229.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
A. R. J. Cabrita, A. J. M. Fonseca, R. J. Dewhurst, C. V. P. Sampaio, M. F. S. Miranda, G. N. S. Sousa, I. M. F. Miranda, and E. Gomes
Nitrogen Supplementation of Corn Silages. 1. Effects on Feed Intake and Milk Production of Dairy Cows
J Dairy Sci, December 1, 2003; 86(12): 4008 - 4019.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1993 by the American Dairy Science Association ®.