I. A. Lashneva, A. A. Sermyagin
Federal Scientific Center of Animal Husbandry – Ernst All-Russian Research Institute of Animal Husbandry, pos. Dubrovitsy, 60, Podol’sk, Moskovskaya obl., 142132, Russian Federation
Abstract. The article considers approaches to assessing the effect of trans fatty acids in milk on the variability of its component composition in Black-and-White and Holstein cows in the Moscow Region in connection with various environmental factors. We studied information on 23 indicators of milk obtained on the basis of infrared spectroscopy and flow cytometry of milk from 6966 cows from 12 breeding herds. We analyzed a total of 20474 milk samples and determined their main breeding parameters, technological properties, as well as metaboliteы, casein, and fatty acids (FA) content. The influence of a farm factor, month, cow’s age, level of trans fatty acids (TFA), and farm x TFA interaction were evaluated by variance analysis. FAs in the total milk fat fraction depending on the criterion of classification were mainly represented by medium-chain (49.07%), palmitic (39.96%), and oleic (18.74%) acids. The content of the desired unsaturated FAs was 21.80%. The level of TFA in the milk was associated not only with a decrease in fat content (by 0.30–0.43%), but also with a decrease in the content of individual FA fractions: palmitic acids – by 0.824–0.893 g/100 g, the total spectrum of saturated acids – by 0.678–0.816 g/100 g, and medium-chain acids – by 0.428–0.480 g/100 g. The concentration of polyunsaturated and long-chain FAs in the milk of cows with TFA increased significantly – by 0.011 g/100 g and 0.242–0.315 g/100 g, respectively. The presence of TFA affects the variability of the milk components, which can be used as a biomarker for detecting a decrease in the synthesis of lipid compounds in cow milk, regardless of a number of economic factors and the age of animals.
Keywords: milk; fatty acids; trans fatty acids; variability; Holstein breed; Black-and-White breed.
Author Details: I. A. Lashneva, post graduate student; A. A. Sermyagin, Cand. Sc. (Biol.), head of division (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.).
For citation: Lashneva IA, Sermyagin AA. The effect of the presence of trans fatty acids in milk on its composition and cows’ productivity. Dostizheniya nauki i tekhniki APK. 2020;34(3):46-50. Russian. doi: 10.24411/0235-2451-2020-10309.