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This study aimed to analyze the effect of phytogenic additives based on cardol, cardanol, and ricinoleic acid on the physico-chemical qualities and biochemical parameters of Holstein cow milk. Nineteen animals were divided into the control (GI) and treatment (GII) groups. Prior to the beginning of the experiment, sodium monensin was removed from the feed provided to the animals. This study consisted of two phases. In the first, animals from GI received the standard diet, without additives, while animals from GII received the standard diet supplemented with 10 g of phytogenic additives for 60 days. At the end of the first stage, the animals remained 30 days without receiving additives and in the second phase the groups were inverted, and the GII again received the phytogenic additive during the subsequent 60 days. Physical-chemical analyzes of milk were performed at moments 0, 15, 30, 45 and 60 days of the experiment and the blood parameters at times 0 and 60 days of the experiment were evaluated. There was no significant difference for the treatment x time interaction in any of the variables, but there was a trend between groups for the CCS parameter and there was a statistical difference for the protein, as well as for the AST. In this study it is observed that the addition of phytogenic additive modulating rumen fermentation based on cardol, cardanol and ricinoleic acid does not compromise, in general, the quality of milk, with positive results for some specific parameters such as protein content and aminotransferase.

Effect of a phytogenic feed additives mixture on milk physico-chemical properties and biochemical parameters of Holstein cows