Yield and composition of milk from primiparous Black and White and Jersey cows
2006
Micinski, J. | Klupczynski, J.(Warminsko-Mazurski Univ., Olsztyn (Poland). Department of Cattle Breeding and Milk Quality Assessment)
The experiment was performed in the years 2003 - 2004 in three farms of Varmio-Mazury region. The experimental materials comprised 128 primiparous Black-White breeds and 121 Jersey breeds. The purpose of experiment was to show milk productivity of cows within 100, 305 days and for a full lactation. The values obtained in this experiment were that productivity of primiparous for the first 100 days of milk yield was high and the squirrel averaged for Black-and-White breed of milk of 2356 kg, 87 kg of fat, 72 kg at the content of elements accordingly 3,73% and 3,06%, and for Jersey breed according to 1626 kg, 87,3 kg (5,37%), 59,66 kg (3,61%). Substantial productivity for 305 days of milk yield in recalculation on productivity ЕСМ was higher for cows of Black-White breed and compounded 6447 kg of milk. Cows of Jersey breed were distinguished however by the higher content of elements, than Black-White breed. For 305 days of milk yield have received a fat content of 5,96% and a squirrel of 3,93%. The season of full lactation of cows considerably differed from model lactation and comprised for Black-White breed 373 days and for Jersey breed 351 days. Quantity of received milk, fat and a squirrel in full lactation was much higher, than in a 305-day's lactation. These differences compounded for Black-White breed of milk of 1128 kg and 93 kg fat + squirrels, and for Jersey breed according to 428 kg of 46 kg
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