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Effects of Dietary Forage and Calf Starter Diet on Ruminal pH and Bacteria in Holstein Calves during Weaning Transition
This study demonstrated that feeding dietary forage alleviates subacute ruminal acidosis due to diurnal changes in ruminal pH.
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Effects of ruminal pH on gene expression in the rumen epithelium, peripheral blood 4 mononuclear cell subpopulations, and blood metabolites from Holstein calves during 5 weaning transition
In this 2019 paper published in The Journal of Veterinary Medical Science, the authors found feeding the only starter to calves decreases rumen pH at weaning with upregulation of the receptor TLR4. Feeding only starter lowered cholesterol synthesis in the rumen epithelium whereas starter and forage combined resulted in higher energy status.
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Dietary starch level alters rumen pH and copper metabolism in lactating Holstein-Friesian dairy
The results of a study in 60 Holstein-Friesian dairy cows highlight the need to take account of dietary effects on rumen pH when deciding on appropriate copper supplementation levels.
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Symposium review: The importance of the ruminal epithelial barrier for a healthy and productive cow
The ruminal epithelium is the main site for absorption of key nutrients and electrolytes. Yet, the absorptive function has to be highly selective to prevent entry of microbes and toxins. This study outlines what researchers know, and still must uncover, about the factors that counteract barrier impairment and help with barrier restoration.
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Physically adjusted neutral detergent fiber system for lactating dairy cow rations. II: Development of feeding recommendations
This study by U.S. researchers quantifies the links between neutral detergent fiber (NDF) intake, diet particle size and ruminal pH.
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Rumen acidosis in the context of precision farming
Download the final report of The first international conference dedicated to acidosis and rumen health, including video recordings.
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Key role of short-chain fatty acids in epithelial barrier failure during ruminal acidosis
Sub Acute Ruminal Acidosis (SARA) is induced by high concentrations of short-chain fatty acids (SCFA) that result in lower ruminal pH and damage to the epithelial barrier function. The present study investigated if SCFA directly contribute to epithelial barrier failure.
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Relative reticulo-rumen pH indicators for subacute ruminal acidosis detection in dairy cows
Sub Acute Ruminal Acidosis (SARA) is defined as a drop in rumen pH, but what is the most accurate way to look at these pH variations? This study addressed this important research question and even accounted for individual variabilities.
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Transient feeding of a concentrate-rich diet increases the severity of subacute ruminal acidosis in dairy cattle
Rumen health is affected by what is fed — and also how its fed. This study shows the relationship between patterns of concentrate-rich feeding and the severity of Sub Acute Ruminal Acidosis (SARA) and rumen VFAs profiles.
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Changes in digestive microbiota due to a grain-based SARA challenge
A study showing how a grain-based diet-induced subacute ruminal acidosis (SARA) challenge impacts the rumen microbiota of lactating dairy cows. The richness, the diversity, as well as the stability of the bacterial communities were reduced for SARA challenged cows. Both ruminal and fecal microbiota were changed, indicating that the rumen but also the hindgut microbiota are affected by SARA challenge.
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