| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Spruce Haven Farm and Research Center, Union Springs, NY
2 Chr. Hansen's Biosystems, Milwaukee, WI
To evaluate the effect of direct-fed microbial (DFM) concentration on diurnal rumen pH profiles and in situ digestibilities, nine ruminally cannulated cows in early lactation were fed treatments consisting of DFM (Enterococcus faecium, Lactobacillus plantarum, and Sacchromyces cerevisiae) at a level of a) 1 x 105 cfu/ml of rumen fluid (105), b) 1 x 106 cfu/ml of rumen fluid (106), and c) 1 x 107 cfu/ml rumen fluid (107 ). Treatments were directly administered via rumen cannula once daily. Cows were fitted with pH probes in their cannula and connected to dataloggers, which monitor pH hourly. The experimental period was 21 d: 7-d adjustment, 14-d for pH, and in situ measurements. Cows fed 105 were able to sustain a higher nadir pH than were cows fed 106 or 107 . Cows fed 105 had a higher digestion rate of high moisture ear corn (HMEC) dry matter. Corn silage digestion was higher for cows fed 105 and 106 compared with those receiving 107. There were no carryover effects of treatment associated with rumen pH when switching from one treatment regimen to the next. Results from this study demonstrate that incorporation of a specific level of DFM aids in reducing diurnal ruminal acidity.
Key Words: direct-fed microbial • ruminal pH
Submitted on January 22, 2001
Accepted on September 18, 2001
This article has been cited by other articles:
|
|
 |
|
  J. Chiquette, M. J. Allison, and M. A. Rasmussen Prevotella bryantii 25A Used as a Probiotic in Early-Lactation Dairy Cows: Effect on Ruminal Fermentation Characteristics, Milk Production, and Milk Composition J Dairy Sci, September 1, 2008; 91(9): 3536 - 3543. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. L. Raeth-Knight, J. G. Linn, and H. G. Jung Effect of Direct-Fed Microbials on Performance, Diet Digestibility, and Rumen Characteristics of Holstein Dairy Cows J Dairy Sci, April 1, 2007; 90(4): 1802 - 1809. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. R. Oetzel, K. M. Emery, W. P. Kautz, and J. E. Nocek Direct-Fed Microbial Supplementation and Health and Performance of Pre- and Postpartum Dairy Cattle: A Field Trial J Dairy Sci, April 1, 2007; 90(4): 2058 - 2068. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. G. V. Emmanuel, A. Jafari, K. A. Beauchemin, J. A. Z. Leedle, and B. N. Ametaj Feeding live cultures of Enterococcus faecium and Saccharomyces cerevisiae induces an inflammatory response in feedlot steers J Anim Sci, January 1, 2007; 85(1): 233 - 239. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Rotger, A. Ferret, S. Calsamiglia, and X. Manteca Effects of nonstructural carbohydrates and protein sources on intake, apparent total tract digestibility, and ruminal metabolism in vivo and in vitro with high-concentrate beef cattle diets J Anim Sci, May 1, 2006; 84(5): 1188 - 1196. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. E. Nocek and W. P. Kautz Direct-Fed Microbial Supplementation on Ruminal Digestion, Health, and Performance of Pre- and Postpartum Dairy Cattle J Dairy Sci, January 1, 2006; 89(1): 260 - 266. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. R. Krehbiel, S. R. Rust, G. Zhang, and S. E. Gilliland Bacterial direct-fed microbials in ruminant diets: Performance response and mode of action J Anim Sci, February 1, 2003; 81(14_suppl_2): E120 - 132. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. E. Nocek, W. P. Kautz, J. A. Z. Leedle, and E. Block Direct-Fed Microbial Supplementation on the Performance of Dairy Cattle During the Transition Period J Dairy Sci, January 1, 2003; 86(1): 331 - 335. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
