| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Livestock Sciences Section, Research Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, T1J 4B1, Canada
Dietary factors that alter the intake of effective fiber were evaluated for their effects on rumen fermentation, digestion, and milk production using a double 4 x 4 quasi-Latin square design with a 23 factorial arrangement of treatments. The dietary factors were extent of barley grain processing, coarse (1.60 mm) or flat (1.36 mm); forage-to-concentrate (F:C) ratio, low (35:65) or high (55:45) (dry matter basis); and forage particle length, long (7.59 mm) or short (6.08 mm). Eight lactating cows with ruminal and duodenal cannulas were offered ad libitum access to a total mixed diet and milked twice daily. Dry matter intake was increased by increasing the extent of grain processing. Mean rumen pH was lower for cows fed flatly rolled barley than for cows fed coarsely rolled barley, whereas F:C ratio or forage particle size had no effect on rumen pH. Rumen pH was not correlated with effective NDF intake but tended to be correlated with digestibility of starch in the rumen. Total tract digestibilities of dry matter, organic matter, starch, and neutral detergent fiber were increased by feeding flatly rolled barley or low F:C ratio diets. Milk yield and milk protein content were higher in cows fed flatly rolled barley or low F:C ratio diets. Milk fat content tended to increase with high F:C ratio or long forage particle length but was reduced by feeding flatly rolled barley. In this study, extent of grain processing and intake of ruminal available starch were the most influential factors affecting milk production. Reducing the ratio of F:C improved total digestion and actual milk production. Forage particle length had minimal impact on digestibility and milk production.
Key Words: grain processing • effective fiber • digestibility • dairy cows
Submitted on November 9, 2000
Accepted on May 11, 2001
This article has been cited by other articles:
|
|
 |
|
  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]
|
|
|
|
|
|
G. N. Gozho, M. R. Hobin, and T. Mutsvangwa Interactions Between Barley Grain Processing and Source of Supplemental Dietary Fat on Nitrogen Metabolism and Urea-Nitrogen Recycling in Dairy Cows J Dairy Sci, January 1, 2008; 91(1): 247 - 259. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. Z. Yang and K. A. Beauchemin Altering Physically Effective Fiber Intake Through Forage Proportion and Particle Length: Digestion and Milk Production J Dairy Sci, July 1, 2007; 90(7): 3410 - 3421. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. Z. Yang and K. A. Beauchemin Altering Physically Effective Fiber Intake Through Forage Proportion and Particle Length: Chewing and Ruminal pH J Dairy Sci, June 1, 2007; 90(6): 2826 - 2838. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. K. Bhandari, K. H. Ominski, K. M. Wittenberg, and J. C. Plaizier Effects of Chop Length of Alfalfa and Corn Silage on Milk Production and Rumen Fermentation of Dairy Cows J Dairy Sci, May 1, 2007; 90(5): 2355 - 2366. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. M. Moorby, R. J. Dewhurst, R. T. Evans, and J. L. Danelon Effects of dairy cow diet forage proportion on duodenal nutrient supply and urinary purine derivative excretion. J Dairy Sci, September 1, 2006; 89(9): 3552 - 3562. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. Z. Yang and K. A. Beauchemin Physically effective fiber: method of determination and effects on chewing, ruminal acidosis, and digestion by dairy cows. J Dairy Sci, July 1, 2006; 89(7): 2618 - 2633. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. Z. Yang and K. A. Beauchemin Increasing the physically effective fiber content of dairy cow diets may lower efficiency of feed use. J Dairy Sci, July 1, 2006; 89(7): 2694 - 2704. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Q. Zebeli, M. Tafaj, H. Steingass, B. Metzler, and W. Drochner Effects of Physically Effective Fiber on Digestive Processes and Milk Fat Content in Early Lactating Dairy Cows Fed Total Mixed Rations J Dairy Sci, February 1, 2006; 89(2): 651 - 668. [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]
|
|
|
|
|
|
H. W. Soita, M. Fehr, D. A Christensen, and T. Mutsvangwa Effects of Corn Silage Particle Length and Forage:Concentrate Ratio on Milk Fatty Acid Composition in Dairy Cows Fed Supplemental Flaxseed J Dairy Sci, August 1, 2005; 88(8): 2813 - 2819. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. A. Beauchemin and W. Z. Yang Effects of Physically Effective Fiber on Intake, Chewing Activity, and Ruminal Acidosis for Dairy Cows Fed Diets Based on Corn Silage J Dairy Sci, June 1, 2005; 88(6): 2117 - 2129. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J.-S. Eun and K. A. Beauchemin Effects of a Proteolytic Feed Enzyme on Intake, Digestion, Ruminal Fermentation, and Milk Production J Dairy Sci, June 1, 2005; 88(6): 2140 - 2153. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. Leonardi, F. Giannico, and L. E. Armentano Effect of Water Addition on Selective Consumption (Sorting) of Dry Diets by Dairy Cattle J Dairy Sci, March 1, 2005; 88(3): 1043 - 1049. [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]
|
|
|
|
|
|
J.-S. Eun, K. A. Beauchemin, S.-H. Hong, and W. Z. Yang Effects of Mechanical Processing on the Nutritive Value of Barley Silage for Lactating Dairy Cows J Dairy Sci, December 1, 2004; 87(12): 4170 - 4177. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. S. Einarson, J. C. Plaizier, and K. M. Wittenberg Effects of Barley Silage Chop Length on Productivity and Rumen Conditions of Lactating Dairy Cows Fed a Total Mixed Ration J Dairy Sci, September 1, 2004; 87(9): 2987 - 2996. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. C. Plaizier Replacing Chopped Alfalfa Hay with Alfalfa Silage in Barley Grain and Alfalfa-Based Total Mixed Rations for Lactating Dairy Cows J Dairy Sci, August 1, 2004; 87(8): 2495 - 2505. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. Z. Yang and K. A. Beauchemin Grain Processing, Forage-to-Concentrate Ratio, and Forage Length Effects on Ruminal Nitrogen Degradation and Flows of Amino Acids to the Duodenum J Dairy Sci, August 1, 2004; 87(8): 2578 - 2590. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. G. Onetti, S. M. Reynal, and R. R. Grummer Effect of Alfalfa Forage Preservation Method and Particle Length on Performance of Dairy Cows Fed Corn Silage-Based Diets and Tallow J Dairy Sci, March 1, 2004; 87(3): 652 - 664. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. M. Calberry, J. C. Plaizier, M. S. Einarson, and B. W. McBride Effects of Replacing Chopped Alfalfa Hay with Alfalfa Silage in a Total Mixed Ration on Production and Rumen Conditions of Lactating Dairy Cows J Dairy Sci, November 1, 2003; 86(11): 3611 - 3619. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. J. Kononoff, A. J. Heinrichs, and H. A. Lehman The Effect of Corn Silage Particle Size on Eating Behavior, Chewing Activities, and Rumen Fermentation in Lactating Dairy Cows J Dairy Sci, October 1, 2003; 86(10): 3343 - 3353. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. J. Kononoff and A. J. Heinrichs The Effect of Corn Silage Particle Size and Cottonseed Hulls on Cows in Early Lactation J Dairy Sci, July 1, 2003; 86(7): 2438 - 2451. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. M. Krause and D. K. Combs Effects of Forage Particle Size, Forage Source, and Grain Fermentability on Performance and Ruminal pH in Midlactation Cows J Dairy Sci, April 1, 2003; 86(4): 1382 - 1397. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. J. Kononoff and A. J. Heinrichs The Effect of Reducing Alfalfa Haylage Particle Size on Cows in Early Lactation J Dairy Sci, April 1, 2003; 86(4): 1445 - 1457. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 K. M. Koenig, K. A. Beauchemin, and L. M. Rode Effect of grain processing and silage on microbial protein synthesis and nutrient digestibility in beef cattle fed barley-based diets J Anim Sci, April 1, 2003; 81(4): 1057 - 1067. [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]
|
|
|
|
|
|
W. Z. Yang, K. A. Beauchemin, and L. M. Rode Effects of Particle Size of Alfalfa-Based Dairy Cow Diets on Site and Extent of Digestion J Dairy Sci, August 1, 2002; 85(8): 1958 - 1968. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
