1Professor of Uzbek Research Institute of Cattle-Breeding, Academician of Russian Academy of Natural Sciences, Uzbekistan
2Doctor of Agricultural Sciences (DSc), Head of the Department of Zootechny, Tashkent State Agrarian University, Uzbekistan
*Email id: soatov1978@mail.ru
Online published on 24 September, 2020.
It was defined during research work that the level of milk productivity of Schwyz breed cows is closely interrelated with production types. Dairy-type cows surpass milk-meat type cows on milk yield per lactation reliably for 458.1 and 983.5 kg, milk butter yield for 16.4 and 37.3 kg, milk protein for 16.3 and 34.6 kg, milk yield of 4% milk for 426 and 932.5 kg, respectively. Cow's milk is also distinguished by its high technological qualities, nutritional value and high suitability for use in cheese-making industry. The study of the lactation curve showed that the cows are characterized by a uniform lactation course, the highest monthly milk yield, regardless of the type, was observed in the second month of lactation, then it gradually decreased by the end of lactation at the tenth month. In the research works, milk productivity of Schwyz cows for the I and II lactations with genotype of European selection was studied. These cows, regardless of lactation, are characterized by high potential for milk productivity. Milk yield of dairy-type cows surpassed milk-meat type peers reliably for 995.7 kg (24.7%), milk production for 100 kg of live weight by 257.2 kg (32.4%), and for the II lactation respectively for 828.4 kg (19.1%) and 217.1 kg (27.4%). The formation of dairy herds by cows taking into account their production type is the key in increasing the productivity of herds.
Cow, Milk, Schwyz Breed, Type, Herd, Milk Yield