Effects of defaunation and dietary coconut oil distillate on fermentation, digesta kinetics and methane production of Brahman heifers

Summary A 2 × 2 factorial experiment was conducted to assess the effects of presence or absence of rumen protozoa and of dietary coconut oil distillate (COD) supplementation on rumen fermentation characteristics, digesta kinetics and methane production in Brahman heifers. Twelve Brahman heifers were...

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Bibliographic Details
Published in:Journal of animal physiology and animal nutrition 2017-10, Vol.101 (5), p.984-993
Main Authors: Nguyen, S. H., Hegarty, R. S.
Format: Article
Language:English
Subjects:
Acetic acid
Animal Nutritional Physiological Phenomena
Animals
Cattle
Cattle - physiology
Coconut oil
Coconut Oil - administration & dosage
Coconut Oil - chemistry
Diet
Diet - veterinary
Dietary Fats - administration & dosage
Dietary supplements
Digestion
Dry matter
Emissions
Eukaryota
Fatty acids
Female
Fermentation
Gastrointestinal Motility - physiology
Hogs
Kinetics
Methane
Methane - biosynthesis
methanogenesis
Microorganisms
Oils & fats
Outflow
Propionic acid
Protozoa
Rumen
Rumen - parasitology
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Summary:Summary A 2 × 2 factorial experiment was conducted to assess the effects of presence or absence of rumen protozoa and of dietary coconut oil distillate (COD) supplementation on rumen fermentation characteristics, digesta kinetics and methane production in Brahman heifers. Twelve Brahman heifers were selected to defaunate, with 6 being subsequently refaunated. After defaunation and refaunation, heifers were randomly allocated to COD supplement or no supplement treatments while fed an oaten chaff‐based diet. Methane production (MP; 94.17 v 104.72 g CH4/d) and methane yield [MY; 19.45 v 21.64 g CH4/kg dry matter intake (DMI)] were reduced in defaunated heifers compared with refaunated heifers when measured at 5 weeks after refaunation treatment (p 
ISSN:0931-2439
1439-0396
DOI:10.1111/jpn.12534