Özet:

Protected oils in Romania participate in the rations of dairy cows with the aim of increasing the energy intensity of the ration without affecting the function of rumen. During temperature stress, metabolic changes occur in cows, dry substance consumption decreases and performance decreases. The importance of preserved fat contributions in the dairy industry is increasing to minimize the negative effects of these changes and to ensure high lactation performance. In various studies, there is also information that preserved oils improve various performance standards. It is found that the use of protected fat as a food contribution in the ration of ruminants in lactation improves milk productivity, milk fat content, milk oil regulates the composition of fatty acids, and reduces the level of milk protein. In general, when the fat contribution to the ratio of dairy cows is limited to the level of 3 % of the dry substance, the digestibility of the dry substance and cellulose is reduced. When protected oil is included, the fat content of the ratio exceeds 6-7% of the dry substance consumption. When ruminants feed fatty acids with calcium salt, plasma cholesterol and progesterone levels increase, which has a positive impact on the quality of the embryo with the ovulation rate. This article discussed the nutrition studies on animals and protected oils used in animal feeding.

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