Acidosis affecting estrus in dairy cows
Analysis of the cause of acidosis
Rumen acidosis, an eating disorder
When acidosis occurs
- Rumen pH drops below 6.5. Acid is produced when ruminal microbes ferment food. If this acid is trapped, the pH of the rumen is lowered and germs are prevented from growing.
- At low rumen pH, the concentration of hydrogen ions outside the body of rumen microbes increases, and hydrogen ions penetrate the microbes, in which case the microbes must expend more energy to release hydrogen ions to maintain the normal pH inside their cells.
- This process results in less energy for the microbes to grow. The microbes that ferment the fiber are most affected.
- In this case, reduced feed intake, fiber digestibility is reduced, and microbial protein production is limited due to ruminal acidosis.
- In these conditions, the cows have diarrhea and are lethargic and drowsy.
Impact of diet
The diets of high-grain dairy cows (grains) and fermentable carbohydrates increase milk production, which in turn increases the risk of subacute acidosis.
Clinical signs of acidosis
- Acidosis affecting estrus in dairy cows
- Reduce milk fat to less than 3%
- Reduce milk protein to less than 3%
- Changes in food consumption,
- Emergence of leg ulcers and lameness,
- Decreased chewing and rumination (less than 50% of cows that lie down chew),
- Reduce milk production by more than 4.5 kg compared to what the ration should provide,
- Stools ranging from hard to diarrhea in similar food groups,
- The presence of mucin and fibrin in the stool,
- The presence of long fibers (larger than 1.2 cm) in the stool,
- Presence of undigested and crushed grains (more than 0.6 cm) in the feces
- Decreased feed efficiency relative to age and lactation days.
Did you know that cows with high densities in freestyle experience acidosis?
Excessive crowding of free stalls and feed manifolds lowers the pH of the rumen. This phenomenon dramatically reduces ruminal function and affects how the animal responds to the diet.
Golden Information Abstract
- The amount of dry matter in the feed is a determining factor in the pH of the rumen.
- Increasing the number of feedings may reduce ruminal pH fluctuations through manual feeding.
- The prevalence of ruminal acidosis in dairy herds is probably about the same as in fattening cows.
- It is not only the amount of starch and sugar in the diet that affects ruminal acid levels; The type of starch and its process are also involved
- Providing soluble and degradable protein in the rumen with starch can help increase microbial protein production and reduce rumen acid formation.
- The inclusion of High-Lipid By-product Pellets (HLBP) and its replacement by barley grain and rapeseed meal reduces the severity of ruminal acidosis compared to conventionally fed cows.
- To prevent acidosis, it is necessary for the animal to gradually become accustomed to diets high in fast-fermenting carbohydrates, as well as to limit its consumption by the animal.