Influence of supplementing pasture-based primiparous Holstein-Friesian dairy cows with crude degummed canola oil on milk fatty acid composition

Otto, John Roger, Malau-Aduli, Bunmi Sherifat, Nichols, Peter, and Malau-Aduli, Aduli Enoch Othniel (2014) Influence of supplementing pasture-based primiparous Holstein-Friesian dairy cows with crude degummed canola oil on milk fatty acid composition. Journal of Nutritional Therapeutics, 3 (2). pp. 55-56.

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The quest for alternative sources of healthy nutrients that facilitate the modification of milk without compromising drinking quality is a continuous research endeavour. The objective of the study was to quantify the milk fatty acid composition of pasture-based primiparous Holstein-Friesian dairy cows supplemented with crude degummed canola oil (CDCO) with a view to improving the milk quality for beneficial health effects. This study tested the hypothesis that incremental supplementation of grazing primiparous Holstein-Friesian cows with CDCO will alter milk fatty acid composition towards increased total monounsaturates. Comparisons were made between unsupplemented grazing dairy cows and their peers on dietary supplements containing low (25ml/Kg DM), medium (35ml/Kg DM) or high levels (50ml/kg DM) of CDCO in addition to ad libitum grazing access to pasture. There was no significant effect (p>0.05) of CDCO supplementation for eight weeks on the proportions of total polyunsaturated fatty acids (tPUFA), omega-3 (ω-3) and omega-6 (ω-6) fatty acids in milk. However, significant impacts of CDCO were observed on the proportions of 18:1ω9c, 18:1ω7t, total saturated (tSFA) and total monounsaturated (tMUFA) fatty acids (p<0.005), with a significant increase in the tMUFA/tSFA ratio in cows consuming CDCO. It was concluded that incremental levels of CDCO supplementation can modify the fatty acid composition of milk towards increased monounsaturates without any negative impact on grazing primiparous cows.

Item ID: 35513
Item Type: Article (Research - C1)
ISSN: 1929-5634
Keywords: monounsaturated fatty acids, polyunsaturated fatty acids, saturated fatty acids, omega-3, omega-6
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© 2014 Otto et al.; Licensee Lifescience Global. This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

Funders: University of Tasmania (UTAS), Tasmanian Institute of Agriculture
Date Deposited: 09 Oct 2014 04:46
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0702 Animal Production > 070204 Animal Nutrition @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8303 Livestock Raising > 830302 Dairy Cattle @ 100%
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