[The energy requirement of young female cattle. 2. Substance and energy metabolism].
The second installment of information on studies over several years of the energy requirement of young female cattle comprises data of the feed intake, the digestibility and metabolizability of the rations used as well as the nitrogen and energy balances of the test animals in six experiments with varying rearing intensities, in which the N, C and energy balances as well as rumen physiologic values were measured monthly using the respiration test technique. Of four experiments, measured values are available over the whole rearing period from calf to calving. The results received from 680 interpretable test periods are-separated for the six experiments--arranged in aggregate form according to live weight range in order to characterize the development of nutrient and energy metabolization processes at various rearing intensities. The results form an essential basis for the derivation of the energy requirement of young female cattle according to factorial criteria.
Forschungszentrum für Tierproduktion Dummerstorf-Rostock, Akademie der Landwirtschaftswissenschaften der DDR, Bereich Tierernährung, Oskar Kellner.
R
R
Schiemann
W
W
Jentsch
L
L
Hoffmann
D000821:Animal Feed; D000818:Animals; D001835:Body Weight; D002417:Cattle / Q000378:metabolism*; D004063:Digestion; D004435:Eating; D004734:Energy Metabolism; D005232:Fatty Acids, Volatile / Q000032:analysis; D005260:Female; D009584:Nitrogen / Q000378:metabolism; D012417:Rumen / Q000032:analysis / Q000378:metabolism
D005232:Fatty Acids, Volatile; D009584:Nitrogen
Untersuchungen zum Energiebedarf weiblicher Jungrinder. 2. Mitteilung. Stoff- und Energieumsatz.