The significance of the first 100 days of lactation on the key production and reproductive indicators in Holstein-Friesian and Simmental cows
2023
Beskorovajni, Radmila | Čanak, Stevan | Popović, Nikola | Jovanović, Rade | Maksimović, Tanja | Popovac, Mladen | Berisavljević, Boris
. Contemporary dairy production, due to the increasing demands of the market, implies continuous improvement. Milk production during the first 100 days of lactation of Holstein-Friesian and Simmental cows can be a valid indicator of production success for the entire lactation period, especially given that maximum milk production is achieved 40 to 60 days after calving. The examination of milk yield and quality in the first 100 days of lactation was carried out on 28 farms in the districts of Belgrade, Mačva, Kolubara and Moravica. Important production and reproductive indicators were monitored in 150 Holstein-Friesian and 115 Simmental cows. The average milk yield in the first 100 days of lactation in the population of the Holstein Friesian cows was 3,159 kg of milk with 3.89% milk fat and 3.28% protein, while the population of tSimmental cows in the first 100 days produced an average of 2,229 kg of milk with 4.04 % milk fat and 3.24 % protein. The longer average duration of the service period also led to a longer average calving interval in both breeds.
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书目信息
出版者 University of Belgrade, Faculty of Agriculture, Belgrade, Serbia