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Effects of lauric acid on ruminal protozoal numbers and fermentation pattern and milk production in lactating dairy cows
- Faciola, A. P., Broderick, G. A., Hristov, A., Leão, M. I.
- Journal of animal science 2013 v.91 no.1 pp. 363
- Holstein, Protozoa, alfalfa silage, cannulas, corn, corn silage, dairy cows, dodecanoic acid, fermentation, milk production, rumen, rumen protozoa, sodium, soybean meal
- The objectives of this study were to evaluate lauric acid (LA) as a practical ruminal protozoa-suppressing agent and assess effects of protozoal suppression on fermentation patterns and milk production in dairy cows. In a pilot study, 6 lactating Holstein cows fitted with ruminal cannulae were used in a randomized complete-block design trial. Cows were fed a basal total mixed ration (TMR) containing (DM basis) 15% alfalfa silage, 40% corn silage, 30% rolled high moisture shelled corn, and 14% solvent soybean meal, and assigned to 1 of 3 treatments: 1) control, 2) 160 g/d of LA, or 3) 222 g/d of sodium laurate, which is equimolar to 160 g/d of LA, all given as a single dose into the rumen via cannulae before feeding. Both agents showed high antiprotozoal activity when pulse dosed at these amounts via ruminal cannulae, reducing protozoa by 90% (P