Show simple item record Shingfield, Kevin J Salo-Väänänen, Pirjo Pahkala, Eero Toivonen, Vesa Jaakkola, Seija Piironen, Vieno Huhtanen, Pekka 2013-11-14T22:02:34Z 2013-11-14T22:02:34Z 2005-08
dc.identifier.citation Shingfield , K J , Salo-Väänänen , P , Pahkala , E , Toivonen , V , Jaakkola , S , Piironen , V & Huhtanen , P 2005 , ' Effect of forage conservation method, concentrate level and propylene glycol on the fatty acid composition and vitamin content of cows' milk ' Journal of Dairy Research , vol 72 , no. 3 , pp. 349-61 . DOI: 10.1017/S0022029905000919 en
dc.identifier.issn 0022-0299
dc.identifier.other PURE: 3538467
dc.identifier.other PURE UUID: 40244dbc-6984-4592-b900-4f2e6c5c6cff
dc.identifier.other PubMed: 16174367
dc.identifier.other Scopus: 24944500358
dc.identifier.other 2160/12593
dc.description.abstract Based on potential health benefits, there is a need to develop effective strategies for enhancing milk fat concentrations of cis-9 18:1, 18:3 n-3 and conjugated linoleic (CLA) content in milk without compromising the sensory or storage characteristics of processed milk or dairy products. Sixteen Finnish Ayrshire dairy cows were used in a cyclic change-over experiment with four 21-d experimental periods and a 4 x 2 x 2 factorial arrangement of treatments to evaluate the effects of forage conservation method, concentrate level and supplements of propylene glycol (PG), and their interactions on milk fatty acid composition and vitamin content. Experimental treatments consisted of four conserved forages offered ad libitum, supplemented with two levels of a standard concentrate (7 or 10 kg/d) and PG (0 and 210 g/d) fed as three equal meals. Primary growths of timothy and meadow fescue sward were conserved by ensiling with none (NA), an inoculant enzyme preparation (IE) or a formic acid based (FORM) additive or as hay 1 week later. Conservation of grass by drying rather than ensiling resulted in lower forage 18:2n-6, 18:3n-3, total fatty acid and fat-soluble vitamin concentrations. In spite of lower intakes, milk fat 18:2n-6 and 18:3n-3 content was higher (P <0.05) for hay than for silage diets (12.1, 9.6, 9.6 and 9.3 and 5.00, 3.51, 4.27 and 2.93 g/kg total fatty acids, for hay, NA, IE and FORM silages, respectively). Forage conservation method had no clear effects on milk trans 18:1 or CLA content. Compared with silage, hay diets resulted in milk containing lower (P <0.001) riboflavin, alpha-tocopherol and beta-carotene concentrations, but had no effect on ascorbic acid, thiamine, pyridoxine or retinol content. Feeding more concentrates had no effect on milk fatty acid composition or milk vitamin content, other than lowering (P <0.001) 16:0 concentrations from 348 to 338 g/kg fatty acids. Supplements of PG led to small (P <0.05) increases in milk 13:0 anteiso and 15:0 content from 1.06 and 11.3 to 1.22 and 12.6 g/kg fatty acids and reduced (P <0.05) the concentrations of ascorbic acid (16.1 v. 15.1 g/kg milk). en
dc.format.extent 13 en
dc.language.iso eng
dc.relation.ispartof Journal of Dairy Research en
dc.rights en
dc.subject Animal Feed en
dc.subject Animal Nutritional Physiological Phenomena en
dc.subject Animals en
dc.subject Cattle en
dc.subject Dairying en
dc.subject Fatty Acids en
dc.subject Female en
dc.subject Milk en
dc.subject Phleum en
dc.subject Propylene Glycol en
dc.subject Vitamins en
dc.title Effect of forage conservation method, concentrate level and propylene glycol on the fatty acid composition and vitamin content of cows' milk en
dc.type /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article en
dc.contributor.institution Department of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en

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