| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Livestock Sciences Section, Research Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada T1J 4B1
Six lactating, cannulated Holstein cows were used in a double 3 x 3 Latin square design to compare the effects of hull-less barley with barley and corn on ruminal fermentation, rate of passage, flow of nutrients to the duodenum, and milk production. Diets consisted of 60% concentrate, 30% barley silage, and 10% alfalfa hay (dry matter basis). Concentrates contained steam-rolled grains: hull-less barley, barley, or corn. Dry matter intake was unaffected by grain source, but starch intake tended to be greatest when hull-less barley or corn was fed. The barley diet was more degradable in the rumen than was the hull-less barley or corn diet, and, therefore, flow of microbial organic matter to the duodenum was greatest for cows fed the barley diet. Flow of microbial N to the duodenum was greater (50 g/d) for cows fed the barley diet than for cows fed the other diets, and the flow of ruminally undegradable N was greater (43 and 28 g/d) for cows fed the hull-less barley and corn diets, respectively, than for cows fed the barley diet. As a result, flow of nonammonia N to the duodenum was unaffected by grain source. Total tract apparent digestibility was highest for cows fed the barley and corn diets. Despite its low digestibility, cows fed the hull-less barley diet produced a similar amount of milk as did cows fed the barley and corn diets. Further studies are needed to evaluate the effects of processing hull-less barley on its utilization by dairy cows.
Key Words: cereal grain • ruminal fermentation • duodenal flow • hull-less barley
Submitted on October 7, 1996
Accepted on March 27, 1997
This article has been cited by other articles:
|
|
 |
|
  V. Fellner, J. C. Burns, and D. S. Marshall Effect of Feeding Corn, Hull-Less or Hulled Barley on Fermentation by Mixed Cultures of Ruminal Microorganisms J Dairy Sci, May 1, 2008; 91(5): 1936 - 1941. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Q. Zebeli, J. Dijkstra, M. Tafaj, H. Steingass, B. N. Ametaj, and W. Drochner Modeling the Adequacy of Dietary Fiber in Dairy Cows Based on the Responses of Ruminal pH and Milk Fat Production to Composition of the Diet J Dairy Sci, May 1, 2008; 91(5): 2046 - 2066. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. C. Marini, D. G. Fox, and M. R. Murphy Nitrogen transactions along the gastrointestinal tract of cattle: A meta-analytical approach J Anim Sci, March 1, 2008; 86(3): 660 - 679. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. Silveira, M. Oba, K. A. Beauchemin, and J. Helm Effect of Grains Differing in Expected Ruminal Fermentability on the Productivity of Lactating Dairy Cows J Dairy Sci, June 1, 2007; 90(6): 2852 - 2859. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. Silveira, M. Oba, W. Z. Yang, and K. A. Beauchemin Selection of Barley Grain Affects Ruminal Fermentation, Starch Digestibility, and Productivity of Lactating Dairy Cows J Dairy Sci, June 1, 2007; 90(6): 2860 - 2869. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. E. Foley, A. N. Hristov, A. Melgar, J. K. Ropp, R. P. Etter, S. Zaman, C. W. Hunt, K. Huber, and W. J. Price Effect of barley and its amylopectin content on ruminal fermentation and nitrogen utilization in lactating dairy cows. J Dairy Sci, November 1, 2006; 89(11): 4321 - 4335. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. M. McGinn, K. A. Beauchemin, A. D. Iwaasa, and T. A. McAllister Assessment of the Sulfur Hexafluoride (SF6) Tracer Technique for Measuring Enteric Methane Emissions from Cattle J. Environ. Qual., August 9, 2006; 35(5): 1686 - 1691. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. Z. Yang and K. A. Beauchemin Effects of Physically Effective Fiber on Chewing Activity and Ruminal pH of Dairy Cows Fed Diets Based on Barley Silage J Dairy Sci, January 1, 2006; 89(1): 217 - 228. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. E. Tiffany and J. W. Spears Differential responses to dietary cobalt in finishing steers fed corn-versus barley-based diets J Anim Sci, November 1, 2005; 83(11): 2580 - 2589. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
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]
|
|
|
|
|
|
K. A. Beauchemin and S. M. McGinn Methane emissions from feedlot cattle fed barley or corn diets J Anim Sci, March 1, 2005; 83(3): 653 - 661. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. Z. Yang and K. A. Beauchemin Effects of Physically Effective Fiber on Digestion and Milk Production by Dairy Cows Fed Diets Based on Corn Silage J Dairy Sci, March 1, 2005; 88(3): 1090 - 1098. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Gonzalez-Ronquillo, J. Balcells, A. Belenguer, C. Castrillo, and M. Mota A Comparison of Purine Derivatives Excretion with Conventional Methods as Indices of Microbial Yield in Dairy Cows J Dairy Sci, July 1, 2004; 87(7): 2211 - 2221. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. J. Reed, G. P. Lardy, M. L. Bauer, T. C. Gilbery, and J. S. Caton Effect of field pea level on intake, digestion, microbial efficiency, ruminal fermentation, and in situ disappearance in beef steers fed growing diets J Anim Sci, July 1, 2004; 82(7): 2123 - 2130. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. R. Bowman, K. A. Beauchemin, and J. A. Shelford Fibrolytic Enzymes and Parity Effects on Feeding Behavior, Salivation, and Ruminal pH of Lactating Dairy Cows J Dairy Sci, February 1, 2003; 86(2): 565 - 575. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
