Rumen Acidosis in Dairy Cattle: Bunk Management Considerations
نویسنده
چکیده
Despite diet formulation for chemical (15) and physically-effective fiber (12) minimums, nonstructural carbohydrate (NSC) and starch maximums (16), and the use of total mixed rations (TMR), some degree of SARA may be inevitable in high-producing dairy herds because total chewing and rumination times per kg of rumen-fermentable organic matter (RFOM) intake declines as RFOM intake increases (Figures 1 and 2). Using RFOM intake to predict fermentation acid production and total chewing time to predict salivary buffer flow, the widening difference between acid production and buffer flow as RFOM intake increases is presented in Figure 3. Increased intake of RFOM as milk production increases is a normal consequence of high milk production, because of increases in DM intake and the feeding of higher-concentrate diets to increase dietary energy density (15).
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