[A comparison between large breeds of cattle and their cross-breeds with Jerseys].
Friesians (ZB) and MRY cows were inseminated with semen from Jersey or Holstein Friesian (ZB) and Jersey or MRY bulls respectively. The Jersey x Friesian (J x ZB) and the Jersey x MRY (J x MRY) crossbreds were compared with their contemporary Friesian and MRY herdmates, respectively. Crossbreds were born without any calving problems. The feet and legs were better, the mature weight, the feed costs and the average carcass values were lower compared to the purebreds. The conclusions are, that in market situations, where milk production or milk fat production is not limited, the crossbreds yield a much higher return per hectare than the purebreds. The present measures to limit milk fat production do not make crossbreds clearly profitable over Friesians and MRY's in the Netherlands. Also the relative increase for milk protein in relation of milk fat has contributed to that.
de Rooy
J
J
DLO-Instituut voor Veeteeltkundig Onderzoek Schoonoord, Zeist.
Oldenbroek
J K
JK
D000822:Animal Husbandry / Q000191:economics; D000818:Animals; D001827:Body Height; D001835:Body Weight; D001947:Breeding; D002417:Cattle / Q000502:physiology*; D003433:Crosses, Genetic; D005260:Female; D007774:Lactation; D008892:Milk / Q000378:metabolism
Een vergelijking tussen grote runderrassen en hun kruisingen met Jerseys.