Abstract
The main objective of this study was to develop practical models to assess and predict the adequacy of dietary fiber in high-yielding dairy cows. We used quantitative methods to analyze relevant research data and critically evaluate and determine the responses of ruminal pH and production performance to different variables including physical, chemical, and starch-degrading characteristics of the diet. Further, extensive data were used to model the magnitude of ruminal pH fluctuations and determine the threshold for the development of subacute ruminal acidosis (SARA). Results of this study showed that to minimize the risk of SARA, the following events should be avoided: 1) a daily mean ruminal pH lower than 6.16, and 2) a time period in which ruminal pH is
| Original language | English |
|---|---|
| Pages (from-to) | 2046-2066 |
| Journal | Journal of Dairy Science |
| Volume | 91 |
| DOIs | |
| Publication status | Published - 2008 |
Keywords
- forage particle-size
- physically effective fiber
- total mixed ration
- corn-silage management
- rumen fermentation characteristics
- controlled-release capsule
- lactation holstein cows
- direct-fed microbials
- grass-legume pasture
- chopped alfalfa hay