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Influence of Nonfat Milk Diets on Intake, Growth, and Energy Utilization by Young Calves¹

Dairy Science Dparment, University of Florida, Gainsville 32601

ABSTRACT

The influence on intake, growth, and energy utilization of feeding undiluted and diluted fresh and reconstituted instantized nonfat milks ad libitum was studied with calves 2 through 22 days of age. Diets were a) fresh nonfat milk; b) reconstituted nonfat milk isocaloric on the metabolizable energy basis to Diet a); c) Diet a) diluted with 1.5 parts of water and d) Diet b) diluted with 1.5 parts of water. Milk intakes and weight gains for the 21 days averaged 273 and 15.8; 232 and 14.6; 380 and 10.2, and 383 and 10.0 kg for Diets a through d. Dietary intakes were significantly different except between the 2 diluted milks. Calves on the diluted milks gained significantly less than those on undiluted.

The kilocalorie intake above resting metabolism per gram of gain was 3.20, 2.75, 1.63, and 1.62 on the respective diets. All values differed significantly except for the comparison between the diluted milks. When values were adjusted for intake, differences were not significant.

¹ Florida Agricultural Experiment Stations Journal Series No. 4039.