| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Animal and Dairy Science Department, University of Georgia, Athens 30602
ABSTRACT
Purified corn and wheat starch were added to alfalfa, Coastal bermudagrass, fescue, and orchardgrass hays at 0, 40, 60, and 80% of the total as-fed substrate, and fiber digestion kinetics were determined in vitro. Kinetics were estimated by the model R = DOe–k(t–L) + U where R is residue remaining at time t, DO is digestible fraction, k is digestion rate constant, L is discrete lag time, and U is indigestible fraction. Parameters of the model were estimated by logarithmic transformation and a direct nonlinear least squares procedure. Corn and wheat starch did not differ in their effect upon lag time of fiber digestion, digestion rate, or potential extent of digestion. Alfalfa had a shorter lag time of fiber digestion (.86 h) than Coastal bermudagrass (3.05 h), but not than orchardgrass or fescue (1.66 and 2.42 h). Orchardgrass differed in fiber digestion rate (.0542h–1) from Coastal bermudagrass (.0698h–1) but not from alfalfa or fescue (.0670 and .0658h–1). The potential extent of fiber digestion was similar for fescue (75.8%) and orchardgrass (76.0%). The potential extent of fiber digestion for alfalfa (50.9%) differed from Coastal bermudagrass (64.3%), and both of these forages differed from fescue or orchardgrass. Addition of starch resulted in a linear increase in lag time of fiber digestion, but digestion rate was not affected. Potential extent of digestion was decreased when starch was added.
1 Supported by State, Hatch, and Georgia Agricultural Commodity Commission for Milk funds allocated to the Georgia Agricultural Experiment Stations for project H-562.
This article has been cited by other articles:
|
|
 |
|
  M. S. H. Mashingo, D. W. Kellogg, W. K. Coblentz, and K. S. Anschutz Effect of Harvest Dates on Yield and Nutritive Value of Eastern Gamagrass Professional Animal Scientist, August 1, 2008; 24(4): 363 - 373. [Abstract] [PDF]
|
|
|
|
 |
|
 D. A. Chabot, C. D. Chabot, L. K. Conway, and S. A. Soto-Navarro Effect of fat supplementation and wheat pasture maturity on forage intake and digestion characteristics of steers grazing wheat pasture J Anim Sci, May 1, 2008; 86(5): 1263 - 1270. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 R. Flores, W. K. Coblentz, R. K. Ogden, K. P. Coffey, M. L. Looper, C. P. West, and C. F. Rosenkrans Jr. Effects of Fescue Type and Sampling Date on the Nitrogen Disappearance Kinetics of Autumn-Stockpiled Tall Fescue J Dairy Sci, April 1, 2008; 91(4): 1597 - 1606. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. A. Bhatti, J. G. P. Bowman, J. L. Firkins, A. V. Grove, and C. W. Hunt Effect of intake level and alfalfa substitution for grass hay on ruminal kinetics of fiber digestion and particle passage in beef cattle J Anim Sci, January 1, 2008; 86(1): 134 - 145. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 R. C. Norman, W. K. Coblentz, D. S. Hubbell III, R. K. Ogden, K. P. Coffey, J. D. Caldwell, R. T. Rhein, C. P. West, and C. F. Rosenkrans Jr. Effects of Storage Conditions on the Forage Quality Characteristics and Ergovaline Content of Endophyte-Infected Tall Fescue Hays Crop Sci., July 30, 2007; 47(4): 1635 - 1646. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. Flores, W. K. Coblentz, R. K. Ogden, K. P. Coffey, M. L. Looper, C. P. West, and C. F. Rosenkrans Jr Effects of Fescue Type and Sampling Date on the Ruminal Disappearance Kinetics of Autumn-Stockpiled Tall Fescue J Dairy Sci, June 1, 2007; 90(6): 2883 - 2896. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. M. Dann, M. P. Carter, K. W. Cotanch, C. S. Ballard, T. Takano, and R. J. Grant Effect of Partial Replacement of Forage Neutral Detergent Fiber with By-Product Neutral Detergent Fiber in Close-Up Diets on Periparturient Performance of Dairy Cows J Dairy Sci, April 1, 2007; 90(4): 1789 - 1801. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. J. Reed, M. R. O'Neil, G. P. Lardy, K. A. Vonnahme, L. P. Reynolds, and J. S. Caton Effect of undegradable intake protein supplementation on intake, digestion, microbial efficiency, in situ disappearance, and plasma hormones and metabolites in steers fed low-quality grass hay J Anim Sci, April 1, 2007; 85(4): 1092 - 1101. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. A. Scarbrough, W. K. Coblentz, K. P. Coffey, D. S. Hubbell III, T. F. Smith, J. B. Humphry, J. A. Jennings, R. K. Ogden, and J. E. Turner Effects of Forage Management on the Nutritive Value of Stockpiled Bermudagrass Agron. J., September 5, 2006; 98(5): 1280 - 1289. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. L. Lawler-Neville, S. M. Shellito, T. D. Maddock, M. L. Bauer, G. P. Lardy, T. C. Gilbery, and J. S. Caton Effects of concentrated separator by-product (desugared molasses) on intake, site of digestion, microbial efficiency, and nitrogen balance in ruminants fed forage-based diets J Anim Sci, August 1, 2006; 84(8): 2232 - 2242. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. C. Gilbery, G. P. Lardy, S. A. Soto-Navarro, M. L. Bauer, and J. S. Caton Effects of corn condensed distillers solubles supplementation on ruminal fermentation, digestion, and in situ disappearance in steers consuming low-quality hay J Anim Sci, June 1, 2006; 84(6): 1468 - 1480. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. M. Shellito, M. A. Ward, G. P. Lardy, M. L. Bauer, and J. S. Caton Effects of concentrated separator by-product (desugared molasses) on intake, ruminal fermentation, digestion, and microbial efficiency in beef steers fed grass hay J Anim Sci, June 1, 2006; 84(6): 1535 - 1543. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. G. Swan, J. G. P. Bowman, J. M. Martin, and M. J. Giroux Increased puroindoline levels slow ruminal digestion of wheat (Triticum aestivum L.) starch by cattle J Anim Sci, March 1, 2006; 84(3): 641 - 650. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. K. Ogden, W. K. Coblentz, K. P. Coffey, J. E. Turner, D. A. Scarbrough, J. A. Jennings, and M. D. Richardson Ruminal in situ disappearance kinetics of nitrogen and neutral detergent insoluble nitrogen from common crabgrass forages sampled on seven dates in northern Arkansas J Anim Sci, March 1, 2006; 84(3): 669 - 677. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. L. Leupp, G. P. Lardy, S. A. Soto-Navarro, M. L. Bauer, and J. S. Caton Effects of canola seed supplementation on intake, digestion, duodenal protein supply, and microbial efficiency in steers fed forage-based diets J Anim Sci, February 1, 2006; 84(2): 499 - 507. [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 forage-based diets J Anim Sci, July 1, 2004; 82(7): 2185 - 2192. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. E. Salado, G. A. Gagliostro, D. Becu-Villalobos, and I. Lacau-Mengido Partial Replacement of Corn Grain by Hydrogenated Oil in Grazing Dairy Cows in Early Lactation J Dairy Sci, May 1, 2004; 87(5): 1265 - 1278. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. Miron, E. Yosef, M. Nikbachat, A. Zenou, E. Maltz, I. Halachmi, and D. Ben-Ghedalia Feeding Behavior and Performance of Dairy Cows Fed Pelleted Nonroughage Fiber Byproducts J Dairy Sci, May 1, 2004; 87(5): 1372 - 1379. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. J. Villalba, F. D. Provenza, and R. E. Banner Influence of macronutrients and polyethylene glycol on intake of a quebracho tannin diet by sheep and goats J Anim Sci, December 1, 2002; 80(12): 3154 - 3164. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. J. Villalba, F. D. Provenza, and R. E. Banner Influence of macronutrients and activated charcoal on intake of sagebrush by sheep and goats J Anim Sci, August 1, 2002; 80(8): 2099 - 2109. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
