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


Otto, J and Malau-Aduli, BS and Nichols, PD and Malau-Aduli, AEO, 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. 55-66. ISSN 1929-5634 (2014) [Refereed Article]


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Licensed under Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0)

DOI: doi:10.6000/1929-5634.2014.03.02.4


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 Details

Item Type:Refereed Article
Keywords:monounsaturated fatty acids, polyunsaturated fatty acids, saturated fatty acids, omega-3, omega-6
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Animal production
Research Field:Animal nutrition
Objective Division:Animal Production and Animal Primary Products
Objective Group:Livestock raising
Objective Field:Dairy cattle
UTAS Author:Otto, J (Mr John Otto)
UTAS Author:Malau-Aduli, BS (Dr Bunmi Malau-Aduli)
UTAS Author:Malau-Aduli, AEO (Associate Professor Aduli Malau-Aduli)
ID Code:91227
Year Published:2014
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2014-05-12
Last Modified:2016-09-22
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