Effects of potassium buffers on feed intake in lactating dairy cows and on rumen fermentation in vivo and in vitro

Journal of Dairy Science
J W WestG T Schelling

Abstract

Twenty-four Holstein cows were used to compare acceptance of concentrates and complete rations containing 1) no buffer, 2) 1.8% potassium bicarbonate, 3) 1.2% potassium carbonate, or 4) 1.5% sodium bicarbonate in the concentrate. When concentrate and a forage blend were offered separately (comparison period 1), concentrate intake did not differ among treatments, but forage blend consumption and complete ration intake was greater with the potassium carbonate ration (comparison period 2). Rumen pH did not differ, but urine pH was higher in cows fed complete rations containing buffers. Cows fed potassium carbonate had higher milk fat percentages than cows fed sodium bicarbonate during the first comparison period and higher than controls during the second comparison period and produced more 3.5% fat-corrected milk and solids-corrected milk than cows fed sodium bicarbonate in both comparison periods. Milk protein percentage was lower in cows fed potassium carbonate diets as compared with those fed sodium bicarbonate diets, but total protein production was similar. In three continuous culture in vitro trials, potassium carbonate maintained fermenter pH comparably to sodium bicarbonate, and total volatile fatty acid and acetate produc...Continue Reading

References

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Feb 1, 1976·Journal of Dairy Science·R J DennisD R Jacobson
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Citations

Jul 23, 2014·Asian-Australasian Journal of Animal Sciences·S Kang, M Wanapat
Jan 4, 2017·Journal of Dairy Science·A R Alfonso-AvilaR Gervais
Oct 1, 1989·Journal of Dairy Science·J I Weller, D Gianola
Apr 17, 2009·International Journal of Biometeorology·U BernabucciB Ronchi
May 18, 2019·Journal of Veterinary Internal Medicine·Thomas WittekStephanie Schneider
Jul 1, 1989·Journal of Dairy Science·L C SolorzanoB R Schricker

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