Variability of cows' milk functional fatty acids level in grazing period. The aim of this study was to determine variation in the content of functional fatty acids (FFA) and to examine the value of the atherogenic (AI) and thrombogenic (TI) indexes in cows' milk during the grazing season. The study was carried out in a low input farm located in Mazovia province. Milk samples were collected from eight lactating cows, which were in a similar phase of lactation (100± 30 day) during the 5 months grazing period (from June to October). Analysis of health-promoting compounds in examined milk lipid fraction was performed using capillary gas chromatography method. The highest concentrations of functional fatty acids of cows milk fat have been reported in September (32.91 g/100g of fat), substantially the lowest one at the beginning and at the end of grazing period (July and October). The most desirable (the lowest) values of AI and TI indexes were achieved in September and in July, respectively. The most favourable SCD activity and the levels of n6/n3 ratio have been presented in July. We concluded that the content of functional fatty acids in cows’ milk varies significantly in particular months of grazing period, influencing its health promoting quality.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.