Abstract
The influence of carbohydrate and N on the digestibility of 7 natural winter forages by white-tailed deer (O. virginianus) was determined by an in vitro technique. Carbohydrate additions increased the in vitro dry matter disappearance (IVDMD) of 5 forages, urea increased IVDMD of 2, and the combination of carbohydrate and urea increased IVDMD of 3. The need for furnishing the limiting component in winter diets of white-tailed deer was emphasized.