engleski

Milk production and fatty acid composition in Simmental cows fed with unprotected sunflower oil

The aim of the study was to evaluate the effect of the unprotected sunflower oil in the diet on the milk production, and changes in milk composition. Ten multiparous Simmental cows in mid-lactation (78 ± ; ; ; 40 DIM) were assigned to change over feeding trial, over 5 weeks research period. Treatment was the basal diet (WSO) and diet supplemented with unprotected sunflower oil (SO). The basal diet consisted of the 26% corn silage, 33% perennial ryegrass haylage, and 41% concentrate in DM. In SO diet 200g/cow/day of unprotected sunflower oil was mixed in concentrate mixture. The milk production and production of milk components did not change significantly during the trial, whereas milk fatty acid composition altered significantly. Short chain and medium chain fatty acids decreased for 0.94%, and 6.42%, respectively, and long chain fatty acid increased for 7.76%. The rumenic (cis-9, trans-11 CLA), linoleic acid (cis-9, cis-12 C 18:2) and stearic acid increased significantly during the treatment, and palmitic, myristic and partially lauric acid significantly decreased over the course of study. We could conclude that unprotected sunflower oil efficiently modified the fatty acid composition of Simmental cows’ milk with no influence on the milk production and the majority of standardly analysed milk components.

sunflower oil; milk; fatty acids; Simmental cows

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