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Carotene Requirements for Guernsey and Jersey Calves as Determined by Spinal Fluid Pressure

Bureau of Dairy Industry, Agricultural Research Administration, United States Department of Agriculture; and University of Maryland²

ABSTRACT

1. Guernsey calves under our experimental conditions required an intake of 34 of carotene per pound of body weight during the winter months to maintain a normal spinal fluid pressure. On the same basis, Jersey calves required an intake of 32 . If inheritance is found to affect carotene requirements, it is possible that these values might need to be modified even for strains within the breed.
   
2. This requirement is slightly higher than for Holstein and Ayrshire calves, which, under similar conditions, require 30 of carotene per lb. of body weight.
   
3. These results appear to indicate that somewhat more attention should be given to the quality of hay used in feeding Guernsey and Jersey calves than in feeding Holstein or Ayrshire calves.
   

¹ The data for the Guernsey calves were collected while the senior author was located at the University of Maryland.

² Scientific Article no. A190. Contribution no. 2098 of the Maryland Agricultural Experiment Station, Department of Dairy Husbandry.