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


     

Journal of Dairy Science Vol. 82 No. 1 143-152
© 1999 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 Van Vuuren, A. M.
Right arrow Articles by De Visser, H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Van Vuuren, A. M.
Right arrow Articles by De Visser, H.

Starch and Stage of Maturity of Grass Silage: Site of Digestion and Intestinal Nutrient Supply in Dairy Cows

A. M. Van Vuuren 1, A. Klop 1, C. J. Van Der Koelen 1, and H. De Visser 1

1 Agricultural Research Department, Institute for Animal Science and Health, Department of Ruminant Nutrition, PO Box 65, 8200 AB Lelystad, The Netherlands

The interaction between the quality of grass silage and starch supplementation on ruminal digestion was studied in an experiment with a 2 x 2 factorial design using four dairy cows. Treatment factors were grass silage harvested after either 21 or 37 d of regrowth and two concentrations of steam-flaked corn starch (0 or 4 kg/d). Ruminal volume and flow of duodenal digesta were estimated. When forage was harvested at a more mature stage, only minor effects were noted for silage composition and, consequently, ruminal and intestinal digestion. The addition of starch to the diet tended to reduce ruminal digestion of neutral detergent fiber. The reduction in ruminal digestion was not compensated by increased digestion in the large intestine. Starch increased duodenal nonammonia N flow because of an increase in bacterial N flow. The increase in bacterial N was accompanied by a reduction in the escape of feed N from the rumen. Results from this study indicate that the addition of ruminally available starch to diets based on grass silage reduced ruminally degradable neutral detergent fiber and increased the duodenal supply of protein. These effects have to be taken into account to predict production responses to extra starch.

Key Words: dairy cattle • grass silage • starch • rumen fermentation

Submitted on December 16, 1997
Accepted on September 16, 1998




This article has been cited by other articles:


Home page
 J DAIRY SCIHome page
K. M. Cooke, J. K. Bernard, and J. W. West
Performance of Dairy Cows Fed Annual Ryegrass Silage and Corn Silage with Steam-Flaked or Ground Corn
J Dairy Sci, June 1, 2008; 91(6): 2417 - 2422.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
K. M. Krause, D. K. Combs, and K. A. Beauchemin
Effects of Increasing Levels of Refined Cornstarch in the Diet of Lactating Dairy Cows on Performance and Ruminal pH
J Dairy Sci, April 1, 2003; 86(4): 1341 - 1353.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1999 by the American Dairy Science Association ®.