Course of calving and quality of calves from black-and-white cows crossed with Belgian blue bulls
1996
Kijak, Z. | Groth, I. | Pogorzelska, J. | Wronski, M. | Wielgosz-Groth, Z. | Mordas, W. (Akademia Rolniczo-Techniczna, Olsztyn (Poland). Katedra Hodowli Bydla)
Value of Belgian blue bulls for commercial crossing with black-and-white cows was studied on the basis of following factors: insemination index, calving number, length of pregnancy period, body weight of cows and their condition after calving, birth weight and vitality of cross-breed calves. Multiparous cows of relatively low body weight and good condition were inseminated with the sperm of 11 Belgian blue bulls. Apart from low body weight the course of calving was normal and cross-breed calves showed good vitality. No evident effect of the bulls on course of calving or calf quality indices was observed
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