Abstract
Studies have found that increasing the salinity of dairy cows with Simmental breeds in the herd is important in increasing milk production and creating high-yielding herds. The amount of milk of the cows having 531-560 kg live weight with the type of milk production was 768-1153 kg (P>0,999), milk fat output was 21.6-27.9 kg, 4% milk volume was 540,3-697.1 kg) higher than the different living weight Equinox with the type of milk-meat, and these indicators were determined as 932.5-1401.3 kg), 26.9-38.5 kg.
References
- .Ashirov M.I., Ashirov B.M., Yuldashev A.A. Breeding Holstein cattle in Uzbekistan. Monograph, Tashkent, "Navruz", 2020, p. 271.
- Ashirov M.I. Improvement of Swiss cattle in Uzbekistan. Monograph, Tashkent. “Navruz”, 2020, p. 192.
- Strekozov N.I., Levina G.N. Individual selection, taking into account the type of animals and the selection of bulls. J. "Zootechnia"., 2001, No. 1, p. 2-3.
- Katmakov PS, Anisimova E.I. Milk productivity and physical and chemical composition of milk of Simmental cows of different breeding .. Bulletin of the Ulyanovsk State Agricultural Academy, 2017., p. 124-127.
- Panin V, A. Genetic potential of milk production of Simmental cows and Holstein x Simmental hybrids. Bulletin of the Orenburg State Agrarian University, 2017, pp. 298-301.
- .Asirov M.I.. Donaev X.A..Yuldashev A.A. Quality of production of Holstein cows depending on different factors. ERBA I nternational journal of Research and Development (IJRD). Volume^5 [Issue 1] January 2020. Impact Factor 6.260/ ISSI I.F.Vol.1.241/ 155-159