THE INFLUENCE OF APPARENT DIGESTIBLE ENERGY AND APPARENT DIGESTIBLE NITROGEN IN THE DIET ON WEIGHT GAIN, FEED CONSUMPTION, AND NITROGEN RETENTION OF GROWING MINK
The influences of the apparent digestible energy (A.D.E.) and the apparent digestible nitrogen (A.D.N.) content of the diet on the food consumption, nitrogen retention, and growth of mink from weaning to pelting age have been determined. It was demonstrated with diets containing from 3.33 to 4.21 Cal of A.D.E. and 26.14 to 39.76 mg of A.D.N. per g of dry matter that increasing the available energy and nitrogen in the diet had a beneficial influence on the growth of mink from 6 to 26 weeks of age. A linear relationship existed between the weight of food consumed and the reciprocal of the A.D.E. content of the food, which indicated that food consumption was largely regulated by the digestible energy content of the diet. The percentage of digestible nitrogen retained was curvilinearly related to the A.D.E.:A.D.N. ratio and appeared to be maximal when the diet contained 140 Cal of digestible energy per g of digestible nitrogen.