Analyses of milk production and fertility of Black Pied cows in first three lactation in a free stall housing
1998
Trifunovic, G. (Poljoprivredni fakultet, Beograd - Zemun (Yugoslavia). Institut za stocarstvo) | Lazarevic, Lj. | Latinovic, D. | Stojic, P. | Stevanovic, Lj.
The aim of the study was estimation of average values and variation of milk and fertility traits in first three lactations and calvings in a free stall housing. The first three lactation lasted 324.4 days, what was satisfactory. Average milk yield was 6140.8 kg, and 5358.0, 6298.2 and 6766.3 kg in the 1st, 2nd and 3rd lactation. Average fat percent was 3.70%, and fat yield 227.0 kg. Average values of fertility traits for first three calvings were: insemination interval 66.7 days; insemination index 2.03; service period 100.8 days; between calving period 378.6 days, and birth weight of calves 36.5 kg (P 0.05). It was concluded that fertility of Black Pied cows in first three calvings was satisfactory under free stall housing. The general conclusion is that investigated herd potentiality for higher milk production which could be achieved with some improvements of feeding and management.
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