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Asian-Australas J Anim Sci > Volume 1(2); 1988 > Article
Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 1988;1(2): 61-63.
DOI: https://doi.org/10.5713/ajas.1988.61    Published online June 1, 1988.
Metabolizable energy requirements for maintenance and growth of suckling calves given milk replacer
J. Sekine, R. Oura, Z. Morita, T. Morooka, Y. Asahida
Abstract
A total of 38 energy balance trials were done for calves fed a liquid milk replacer, calf starter and second cut mixed hay. Milk replacer supplied 81% of the total dietary energy. Live weight of calves averaged 54.1 (S.D 6.2) kg and daily gain 0.37 ( 0.23)kg. The metabolizability of gross energy averaged 0.822. A regression was calculated relating energy retention (ER, kJ/kg0.75) to the intake of metabolizable energy (IME, kJ/kg0.75): ER = 0.72 ( 0.12) IME - 330, r = 0.702, P < 0.01, S.E. 18.0. Metabolizable energy for maintenance (MEm) was calculated to be 458 kJ/kg0.75 when ER = 0. The amount of IME over MEm for an individual animal (Meg, kJ/kg0.75) was regressed on averaged daily gain (ADG, kg): Meg = 413 ( 91) ADG + 0.2, r = 0.650, P < 0.01, S.E. 21. The amount of ME requirement for suckling calves was estimated using values obtained above.
Keywords: Milk Replacer Fed Calves; Metabolizable Energy; Maintenance; Growth; Metabolizability


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