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The Carotene Requirements for Reproduction in Guernsey Cattle

Departments of Dairying and Agricultural Chemistry Research, Oklahoma Agricultural and Mechanical College

ABSTRACT

Earlier work by Kuhlman and Gallup (7) has shown that carotene intakes of 45 7 per pound body weight are required for Jersey cows for successful reproduction. Converse and Meigs (1) reported that the carotene requirements during the last months of the gestation period of dairy cattle were between 80 and 120 7 per pound body weight. The daily allowances recommended by the National Research Council (8) are 60 per pound body weight for maintenance with an additional daily allowance of 30 rag. per cow during the last 2 to 3 months of gestation period.

Working with beef cattle, Davis and Madsen (2) found satisfactory reproduction when the carotene intake was maintained at 60 7 per kilogram body weight. Guilbert et al. (5) observed successful reproduction with a carotene intake of 26 to 33 y per kilogram body weight, provided this was increased five-fold during the last month of pregnancy.

¹ Deceased.