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Effects of lauric acid on ruminal protozoal numbers and fermentation pattern and milk production in lactating dairy cows

Permanent URL:
http://handle.nal.usda.gov/10113/56872
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Abstract:
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
Author(s):
A. P. Faciola , G. A. Broderick , A. Hristov , M. I. Leão
Subject(s):
Holstein , Protozoa , alfalfa silage , cannulas , corn , corn silage , dairy cows , dodecanoic acid , fermentation , milk production , rumen , rumen protozoa , sodium , soybean meal
Source:
Journal of animal science 2013 v.91 no.1
Language:
English
Year:
2013
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.