About the terms of economic use of black-and-white cows in the conditions of Tajikistan

Abstract

The article presents materials on the productive longevity of Tajik cows of the black-and-white breed in conditions of intensive milk production technology. It was found that depending on the fact that breeding plants are located in the central and northern parts of the republic, the productive longevity of cows is different. In the farm named after L.Murodov, cows are used up to 7.12 lactation, and in the farms named after A.Yusupov and "Barakat" - 6.54 and 6.80 lactation. Cows farm named after L.Murodov outperformed cows farm named after A.Yusupov and "Barakat" for lifetime milk yield by 17.4% and 6.1%, the total amount of milk fat by 17.1 and 6.1%. The duration of the use of cows in farms in subsequent lactation indicators decrease. In the farms of the Northern part, the use of cows is also different. In the farm "Navgilem" of the Isfara district, they are used up to 6.64 lactation. Their lifetime milk yield was 22534 kg, which is more than other farms by 1186 kg (5.5%) and 3526 kg (18.5%) (P 0.999). In terms of milk fat yield, they also exceeded by 42.9 kg (5.2%) and 133.9 kg (18.5%).