Some factors affecting live weight, daily gain and body condition in dairy cows during the dry period, live weight of newborn calves and their interrelations
2000
Cergovska, Zh | Mitev, J. | Yordanova, L. | Todorov, N. | Miteva, T. (Thracian University - Agricultural Faculty, Stara Zagora (Bulgaria))
The study included 763 calvings, 199 of which were of cows from the Bulgarian Black and White breed and 564 - from the Bulgarian Brown breed. The relationships between the live weight, the average daily gain, the body condition of cows and the live weight of the off-springs at calving as well as the effect of seasons, age (number of lactation), the year of calving, the breed, and the length of the dry period on those parameters were studied. The live weight of cows varied according to their age degree of fatness. Older cows were predisposed to storing more body reserves compared to younger ones at an uniform level of feeding. Fatter cows gave birth to calves with greater live weight.
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Эту запись предоставил Institute of Agricultural Economics