The Carotene Requirements for Reproduction in Guernsey Cattle

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.