Relationships of milk fatty acid profile with methane production in dairy cattle

J. Dijkstra, J.A. Apajalahti, A. Bannink, W.J.J. Gerrits, J.R. Newbold, H.B. Perdok, S.M. van Zijderveld, H. Berends

Research output: Chapter in Book/Report/Conference proceedingAbstractAcademic

Abstract

The development of simple indicators to quantify methane production in cattle is of interest, both for research and for practical purposes on-farm. The profile of milk fatty acids (FA) may be related to methane production, given that diet composition affects rumen microbial metabolism and methanogenesis, as well as the supply of preformed FA and FA precursors to the mammary gland. The aim of this experiment was to evaluate the relationship of milk FA profile with methane production in dairy cattle. Data from three experiments with dairy cattle, encompassing 10 dietary treatments and 50 observations, were used. Dietary treatments included supplementation with calcium fumarate, diallyldisulfide, caprylic acid, capric acid, lauric acid, myristic acid, extruded linseed, linseed oil, and yucca powder. Methane was measured using open-circuit indirect respiration calorimetry chambers and expressed as g per kg dry matter intake (DMI). After extraction and methylation, milk FA were analyzed by gas chromatography and individual FA expressed as % of total FA. To determine the relationship between milk FA profile and methane production, mixed model regression techniques (PROC MIXED of SAS) were applied including a random experiment effect. A multivariate model was developed using a stepwise procedure (PROC GLMSELECT of SAS) with selection of FA based on the Schwarz Bayesian Information Criterion. Observations were weighted by the n of the experiment. Dry matter intake was 17.7 ± 1.83 kg/d, milk production was 27.0 ± 4.64 kg/d, and methane production was 376 ± 55.7 g/d (values expressed as means ± SD). Milk C10:0, C11:0, C14:0iso, C15:0iso, and C16:0 were positively related (P
Original languageEnglish
Title of host publicationProceedings of the 4th international conference on greenhouse gases and animal agriculture, Banff, Canada, 3-8 October, 2010
Place of PublicationBanff
Pages169-169
Publication statusPublished - 2010
Event4th international conference on greenhouse gases and animal agriculture, Banff, Canada -
Duration: 3 Oct 20108 Oct 2010

Conference

Conference4th international conference on greenhouse gases and animal agriculture, Banff, Canada
Period3/10/108/10/10

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