L. Yu. Bolotova, V. G. Prokopyev
Kemerovo Research Agricultural Institute, the branch of the Siberian Federal Research Center of Agricultural Biotechnology of the RAS, ul. Tsentral’naya, 47, pos.Novostroika, Kemerovskii r-n, Kemerovskaya obl., 650510, Russian Federation
Abstract. The influence of productive qualities of mothers on the growth and development of their daughters in different age periods, and their milk productivity was determined. The experiment was carried out in 2016–2017 at Holsteinized Black-and-White cattle in Kemerovo region. The daughters were divided into 5 groups according to the milk yield for 305 days of the highest lactation of their mothers. The groups were: I – up to 7000 kg (n = 28); II – 7001–8000 kg (n = 59); III – 8001–9000 kg (n = 91); IV – 9001–10000 kg (n = 57); V – 10001 kg and more (n = 29). The highest average daily gain during the growing period from birth to 6 months of age was observed in group V (762.2 g), and the lowest one was in group I (681.5 g). The average daily gain of live weight from 6 to 12 months was higher in group IV (979.4 g). At the age of from 0 to 18 months, the heifers from group V exceeded animals from group I and II in absolute increase by 19.2 kg and 13.3 kg, respectively; for relative increase the excess was 41% and 30%, respectively. Milk yield of heifers from group V exceeded milk yield of heifers from group I by 61 kg, but the difference in output of milk fat and protein was 11 kg in favor of the latter. The correlations between the milk yield of mothers and daughters, the live weight of the daughters and their milk yield were statistically unreliable; the largest correlation was observed between the weight in 6 months and the milk yield for 305 days of the first lactation in animals from group I (r = -0.318). The data obtained will allow the selection of offspring on the development indicators in different age periods, taking into account the milk productivity of mothers.
Keywords: heifer; lactation; live weight; milk yield; absolute increase; relative increase; milk productivity.
Author Details: L. Yu. Bolotova, research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); V. G. Prokopyev, Cand. Sc. (Agr.), leading research fellow.
For citation: Bolotova L.Yu., Prokopyev V.G. Development of Holsteinized Black-and-White Heifers Depending on Milk Productivity of Mothers. Dostizheniya nauki i tekhniki APK. 2018. Vol. 32. No. 11. Pp. 64–66 (in Russ.). DOI: 10.24411/0235-2451-2018-11117.