Acta Univ. Agric. Silvic. Mendelianae Brun. 2018, 66(1), 69-76 | DOI: 10.11118/actaun201866010069

Nutritionally Desirable Fatty Acids Including Cla of Cow's Milk Fat Explained by Animal and Feed Factors

Robert Kala1, Eva Samková1, Jana Koubová1, Lucie Hasoňová1, Martin Kváč2, Tamara Pelikánová3, Jiří Špička3, Oto Hanuš4
1 Department of Food Biotechnology and Agricultural Products Quality, Faculty of Agriculture, University of South Bohemia, Branisovska 1645/31a, 370 05 Ceske Budejovice, Czech Republic
2 Department of Animal Husbandry Sciences, Faculty of Agriculture, University of South Bohemia, Branisovska 1645/31a, 370 05 Ceske Budejovice, Czech Republic
3 Department of Applied Chemistry, Faculty of Agriculture, University of South Bohemia, Branisovska 1645/31a, 370 05 Ceske Budejovice, Czech Republic
4 Dairy Research Institute, Ltd., Ke Dvoru 791/12a, 160 00 Prague, Czech Republic

This study evaluated the effects of four factors (breed, parity, month of lactation and feeding ration) on the total explained variation (R2) determining composition of nutritionally important fatty acids. Individual milk samples were collected four times over an entire year (March, June, September, and December, respectively) on a conventional farm from two breeds: Czech Fleckvieh (dual-purpose, local) and Holstein (dairy, worldwide). In total, 145 samples (36; 38; 35 and 36, respectively) were analysed. Within the R2, feeding ration and month of lactation were the main factors affecting milk fatty acids composition, whereas breed and parity showed a low effect. A high percentage of the R2 was observed in rumenic acid (52 %), for example, whereas a low percentage was observed in both palmitic acid (30 %) and oleic acid (30 %). This may be due to intra-breed variability affected by different genetic predisposition of each cows, their performance or individual response to changes in feeding ration.

Keywords: cows, milk fatty acid, rumenic acid, breed, lactation, feeding ration
Grants and funding:

Supported by the Ministry of Agriculture of the Czech Republic, project No. QJ1510336 and the Grant Agency of University of South Bohemia, project No. 002/2016/Z.

Prepublished online: February 28, 2018; Published: September 1, 2018  Show citation

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Kala, R., Samková, E., Koubová, J., Hasoňová, L., Kváč, M., Pelikánová, T., Špička, J., & Hanuš, O. (2018). Nutritionally Desirable Fatty Acids Including Cla of Cow's Milk Fat Explained by Animal and Feed Factors. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 66(1), 69-76. doi: 10.11118/actaun201866010069
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