| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Department of Animal and Veterinary Science, University of Idaho, Moscow 83844
2 FinnFeeds International Ltd., Marlborough, Wiltshire SN8 1AA, United Kingdom
In trial 1, 30 midlactation (213 d in milk) Holstein cows were randomly assigned to a control or enzyme treatment in a two-period crossover design and were fed a total mixed ration based on alfalfa hay and silage. Cows on the enzyme treatment received an enzyme solution containing cellulases and xylanases, which was sprayed on the forage component of the ration at a rate of 1.65 ml/kg of forage dry matter (DM) between 8 and 24 h prior to feeding. Cows consuming the forage treated with enzyme produced more milk (27.2 vs. 25.9 kg/d) and digested more DM per day than did cows fed the control forage. In trial 2, 40 early lactation Holstein cows were assigned to one of four treatments for 16 wk. Following a 2-wk covariate period, cows were assigned to 1) no enzyme treatment, 2) a low (1.25 ml/kg of forage DM) enzyme treatment, 3) a medium (2.5 ml/kg of forage DM) enzyme treatment, or 4) a high (5.0 ml/ kg of forage DM) enzyme treatment. Enzymes were a 2:1 combination of cellulase and xylanase diluted in water and sprayed on a combination of alfalfa hay and silage and whole cottonseed immediately before mixing with a concentrate based on barley. Dry matter intakes were similar for cows on treatments 2, 3, and 4 and were greater than those for cows on treatment 1. Production of milk, 3.5% fat-corrected milk, and energy-corrected milk was greater for cows on treatment 3 than for cows on treatment 1. Fibrolytic enzymes applied to the forage portion of the rations prior to feeding improved lactational performance of early and midlactation cows.
Key Words: enzymes • fiber • lactation
Submitted on June 12, 1998
Accepted on November 19, 1998
This article has been cited by other articles:
|
|
 |
|
  L. A. Giraldo, M. L. Tejido, M. J. Ranilla, S. Ramos, and M. D. Carro Influence of direct-fed fibrolytic enzymes on diet digestibility and ruminal activity in sheep fed a grass hay-based diet J Anim Sci, July 1, 2008; 86(7): 1617 - 1623. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. A. Reddish and L. Kung Jr. The Effect of Feeding a Dry Enzyme Mixture with Fibrolytic Activity on the Performance of Lactating Cows and Digestibility of a Diet for Sheep J Dairy Sci, October 1, 2007; 90(10): 4724 - 4729. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. F. Knowlton, M. S. Taylor, S. R. Hill, C. Cobb, and K. F. Wilson Manure Nutrient Excretion by Lactating Cows Fed Exogenous Phytase and Cellulase J Dairy Sci, September 1, 2007; 90(9): 4356 - 4360. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. Colombatto, F. L. Mould, M. K. Bhat, D. P. Morgavi, K. A. Beauchemin, and E. Owen Influence of fibrolytic enzymes on the hydrolysis and fermentation of pure cellulose and xylan by mixed ruminal microorganisms in vitro J Anim Sci, April 1, 2003; 81(4): 1040 - 1050. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. D. Sutton, R. H. Phipps, D. E. Beever, D. J. Humphries, G. F. Hartnell, J. L. Vicini, and D. L. Hard Effect of Method of Application of a Fibrolytic Enzyme Product on Digestive Processes and Milk Production in Holstein-Friesian Cows J Dairy Sci, February 1, 2003; 86(2): 546 - 556. [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]
|
|
|
|
|
|
J. L. Vicini, H. G. Bateman, M. K. Bhat, J. H. Clark, R. A. Erdman, R. H. Phipps, M. E. Van Amburgh, G. F. Hartnell, R. L. Hintz, and D. L. Hard Effect of Feeding Supplemental Fibrolytic Enzymes or Soluble Sugars with Malic Acid on Milk Production J Dairy Sci, February 1, 2003; 86(2): 576 - 585. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. A. Beauchemin, D. Colombatto, D. P. Morgavi, and W. Z. Yang Use of Exogenous Fibrolytic Enzymes to Improve Feed Utilization by Ruminants J Anim Sci, February 1, 2003; 81(14_suppl_2): E37 - 47. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. F. Knowlton, J. M. McKinney, and C. Cobb Effect of a Direct-Fed Fibrolytic Enzyme Formulation on Nutrient Intake, Partitioning, and Excretion in Early and Late Lactation Holstein Cows J Dairy Sci, December 1, 2002; 85(12): 3328 - 3335. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. R. Bowman, K. A. Beauchemin, and J. A. Shelford The Proportion of the Diet to which Fibrolytic Enzymes are Added Affects Nutrient Digestion by Lactating Dairy Cows J Dairy Sci, December 1, 2002; 85(12): 3420 - 3429. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. Kung Jr., M. A. Cohen, L. M. Rode, and R. J. Treacher The Effect of Fibrolytic Enzymes Sprayed onto Forages and Fed in a Total Mixed Ratio to Lactating Dairy Cows J Dairy Sci, September 1, 2002; 85(9): 2396 - 2402. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
