[Growth studies of bulls of black-and-white dairy cattle during low feed levels. 4. Derivation of energy requirements].
On the basis of two long-term individual feeding experiments the growth-related energy requirement values for low live weight gains (500, 600 and 700 g daily cumulative live weight gain per animal derived by Pieper et al. in 1984 (1984b) were ascertained more precisely. The differences from the recommendations of the GDR feed evaluation system found earlier (Pieper et al. 1984) were confirmed. In general one can say that the differentiation of energy requirement in dependence of live weight gain with live weight being equal is greater than according to the GDR feed evaluation system (1986). Under consideration of a norm factor of 1.05 this results in the live weight range of between 50 and 500 kg and with a cumulative live weight gain of 500 g/animal and day in an energy expenditure of 4.44 kEFUcattle/kg live weight gain, of 600 g/animal and day i an energy expenditure of 4.08 kEFUcattle/kg live weight gain and of 700 g/animal and day in an energy expenditure of 3.82 kEFUcattle/ kg live weight gain.
Elvert
P
P
Sektion Tierproduktion der Wilhelm-Pieck-Universität Rostock.
Gabel
M
M
Poppe
S
S
Papstein
H J
HJ
Grosse
F
F
D000821:Animal Feed; D000818:Animals; D002417:Cattle / Q000254:growth & development* / Q000378:metabolism; D004032:Diet; D002149:Energy Intake; D004734:Energy Metabolism; D008297:Male; D009751:Nutritional Requirements; D015430:Weight Gain
Wachstumsuntersuchungen an Bullen des Schwarzbunten Milchrindes bei niedrigem Fütterungsniveau. 4. Mitteilung. Ableitung von Energiebedarfswerten.