The effects of different levels of roughage on intake and apparent absorption of calcium (Ca), phosphorus (P), sodium (Na), potassium (K) and magnesium (Mg) were studied. Forty Holstein x Zebu calves, with initial average live weight of 60 kg, allotted to a completely randomized design, were fed concentrate and chopped coastcross (Cynodon dactylon) grass hay ad libitum in the following levels: 10; 25; 40; 55 e 90%, on a DM basis. The coefficients of apparent absorption were obtained by one […]