[Growth and development of replacement heifers of different lines at farms with different feeding levels]
2007
Doroshko, A.A., Grodno State Agrarian Univ., Grodno (Belarus)
Some research of different inside-breeds types heifers growth and development were conducted at farms of the Volkovysk region. It is stated that with no dependence on feeding levels heifers of Holstein lines differ from Black-Motley by higher live weight at birth and this tendency is saved till 12-month age at high feeding level and till 9-month age at middle feeding levels. Intensive growth with gradually decreasing live weight growth let us get perfectly developed heifers of Holstein and Black-Motley lines. By 18-month age they reach 417-418 kg live weight. It is determined that animals of Holstein lines at all farms had longer legs and body that is typical of milk cattle. Animals of Black-Motley lines had higher blockiness index that is typical of meat-milk cattle
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