Association of official analytical chemists. 1984. Official methods of analysis, 13th ed. AOAC, Washington, DC.
Beauchemin, K. A., L. M. Rode and V. J. Sewalt. 1995. Fibrolytic enzymes increase fiber digestibility and growth rate of steers fed dry forages. Can. J. Anim. Sci. 75:641-644.
Beauchemin, K. A., S. D. Jones, L. M. Rode and V. J. Sewalt. 1997. Effects of fibrolytic enzymes in corn or barley diets on performance and carcass characteristics of feedlot cattle. Can. J. Anim. Sci. 77:645-653.
Beauchemin, K. A., L. M. Rode and D. Karren. 1999a. Use of feed enzymes in feedlot finishing diets. Can. J. Anim. Sci. 79:243-246.
Beauchemin, K. A., W. Z. Yang and L. M. Rode. 1999b. Effects of grain source and enzyme additive on site and extent of nutrient digestion in dairy cows. J. Dairy Sci. 82:378-390.
Beauchemin, K. A., L. M. Rode, M. Maekawa, D. P. Morgavi and R. Kampent. 2000. Evaluation of a nonstarch polysaccharidase feed enzyme in dairy cow diets. J. Dairy Sci. 83:543-553.
Feng, P., C. W. Hunt, G. T. Pritchard, and W. E. Julien. 1996. Effect of enzyme preparations and in vitro degradation and in vitro digestive characteristics of mature cool-season grass forage in beef steers. J. Anim. Sci. 74:1349-1357.
Georing, H. K., and P. J. Van Soest. 1970. Forage fiber analysis. Agriculture handbook No. 379. Agr. Res. Serv., USDA, Washington, DC.
Hristov, A. N., T. A. McAllister and K. Cheng. 1998. Effect of dietary or abomasal supplementation of exogenous polysaccharide- degrading enzymes on rumen fermentation and nutrient digestibility. J. Anim. Sci. 76:3146-3156.
Kung, Jr. L., R. J. Treacher, G. A. Nauman, A. M. Smagala, K. M. Endres and M. A. Cohen. 2000. The effect of treating forages with fibrolytic enzymes on its nutritive value and lactation performance of dairy cows. J. Dairy Sci. 83:115-122.
Lewis, G. E. C. W. Hunt, W. K. Sanchez, R. Treacher, G. T. Pritchard and P. Feng. 1996. Effect of direct fed fibrolytic enzymes on digestive characteristics of a forage based diet fed to beef steers. J. Anim. Sci. 74:3020-3028.
Lewis, G.E., W. K. Sanchez, C. W. Hunt, M. A. Guy, G. T. Pritchard, B. I. Swanson and R. J. Treacher. 1999. Effect of direct-fed fibrolytic enzymes on lactational performance of dairy cows. J. Dairy Sci. 82:611-617.
National Research Council. 1989. Nutrient requirements of dairy cattle. 6th rev. ed. Natl. Acad. Sci. Washington, DC.
Richardson, G. H. 1985. Standard methods for the examination of dairy products. 15th ed, American public health association, Washington, DC.
Rode, L. M., W. Z. Yang and K. A. Beauchemin. 1999. Fibrolytic enzyme supplements for dairy cows in early lactation. J. Dairy Sci. 82:2121-2126.
SAS/STAT User's Guide. 1998. Version 7.0, 4th ed. SAS Institute Inc. Cary, NC, USA.
Schingoethe, D. J., G. A. Stegeman and R. J. Treacher. 1999. Response of lactating dairy cows to a cellulase and xylanase enzyme mixture applied to forages at the time of feeding. J Dairy Sci. 82:996-1003.
Steel, G. D. R. and H. J. Torrie. 1986. Principles and Procedures of Statistics. 2nd ed., McGrow- Hill.
Yang, W. Z., K. A. Beauchemin and L. M. Rode. 1999. Effects of an enzyme feed additive on extent of digestion and milk production of lactating dairy cows. J. Dairy Sci. 82:391-403.
Yang, W. Z., K. A. Beauchemin and L. M. Rode. 2000. A comparison of methods of adding fibrolytic enzymes to lactating cow diets. J. Dairy Sci. 83:2512-2520.
Zheng, W., D. J. Schingoethe, G. A. Stegeman, A. R. Hippen and R. J. Treachert. 2000. Determination of when during the lactation cycle to start feeding a cellulase and xylanase enzyme mixture to dairy cows. J. Dairy Sci. 83:2319-2325.