| Effect of feeding rolled flaxseed on milk fatty acid profiles and reproductive performance of dairy cows. | |
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MedLine Citation:
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PMID: 20622184 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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The objectives were to study the effects of feeding rolled flaxseed (FLX) to early-lactation dairy cows on milk yield, milk components, and milk fatty acid profiles as well as on measures of cow reproduction. Lactating Holstein cows, on 3 commercial dairies, were fed either an early-lactation ration (CON) or a ration that was similar in protein, energy, and fat content but that included FLX (0.85 kg of DM/cow per day). Within each dairy, cows were allocated alternately to breeding pens upon leaving the fresh pen (approximately 10 ± 5 d postpartum). Pens (n = 4 to 5 pens/dairy) were randomized to treatment (n = 2 to 3 pens/treatment per dairy). Pen (CON, n = 6; FLX, n = 7) was considered the experimental unit and data were analyzed as a split plot with pen as the whole-plot error term. Cows fed FLX had greater (P ≤ 0.06) proportions of cis-9, trans-11 C18:2, C18:3n-3, and C20:0 fatty acids in milk fat and a lesser (P = 0.03) proportion of C20:3n-6 fatty acid when compared with cows fed the CON diet. Treatment did not affect (P ≥ 0.24) milk yield, milk protein, protein yield, milk fat, or milk fat yield. No interactions (P ≥ 0.52) were found between treatment and season of the year or parity, or between treatment and days open, pregnancies per AI at first or second service, or pregnancy loss. In conclusion, feeding FLX at 0.85 kg/cow per day (DM basis) altered the fatty acid profile of milk, but milk yield, milk composition, and reproductive performance of dairy cows were not affected. |
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Authors:
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N R Bork; J W Schroeder; G P Lardy; K A Vonnahme; M L Bauer; D S Buchanan; R D Shaver; P M Fricke |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-07-09 |
Journal Detail:
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Title: Journal of animal science Volume: 88 ISSN: 1525-3163 ISO Abbreviation: J. Anim. Sci. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-10-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: United States |
Other Details:
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Languages: eng Pagination: 3739-48 Citation Subset: IM |
Affiliation:
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Department of Animal Sciences, North Dakota State University, Fargo, 58108, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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