РЕАЛИЗАЦИЯ ПРОДУКТИВНЫХ КАЧЕСТВ КОРОВ СИММЕНТАЛЬСКОЙ ПОРОДЫ ПРИ СБАЛАНСИРОВАННОМ КОРМЛЕНИИ

Abstract

The realization of genetic potential of dairy cattle today is primarily associated with balanced feeding, which can be provided only with high quality bulky feed. In 2016, 2500 t of silage of corn fresh yield at the milk-wax stage of ripeness with a new biological preservative (based on lactic and propionic acid bacteria, 3 g/t) and 4000 t of preserved silage were tested at “Roshcha” LLC in Bazarno-Karabulaksky district of Saratov region. The silage with the new biological preservative significantly improved after storage, compared with the preserved silage: pH - 4.1; total amount of organic acids - 2.80%, content of lactic acid in the total amount of acids - 2.10%, acetic acid - 0.70%, no butyric acid, content of lactic and acetic acids in the total amount - 75 and 25% respectively. The test conducted on lactating cows during the first lactation phase showed that a diet with silage prepared with the biological preservative increased daily yield of 4 % milk by 6,7 % as compared with the control (p < 0.05). Biochemical blood parameters of the cows of the test group indicated the improvement of anabolic processes, it provided an increase in milk productivity. The additional profit after sales of milk obtained from the test group was 3325.5 rubles/animal. To balance the diet of cows in energy and nutrients and to fulfill the productive potential of cows, it is necessary to improve feed base, taking into account available technologies, and to improve quality of bulky feed by using new biological preservatives.