title: High calcium intake lowers apparent digestibility of energy in veal calves.
abstract: Veal calves aged 8 weeks were fed iso-energetic amounts of milk replacers with either a low (7.1 g of calcium/kg of air-dry diet) or a high concentration of calcium (11.6 g of calcium/kg of air-dry diet) for a period of 10 weeks. The extra calcium was added in the form of calcium formiate. Final body weight of the two dietary groups was similar. Faeces were collected during the final week of the trial. The high calcium diet raised faecal dry matter output by 87% and faecal energy by 70%. The extra output of faecal dry matter was composed of 36% and 37% of crude fat and ash, respectively. The extra faecal energy output was for 75% in the form of crude fat. The high versus low calcium intake not only depressed apparent digestibility of total lipids but also that of crude protein, carbohydrates and ash. It is concluded that a high calcium intake by veal calves reduced energy availability without affecting body weight gain.
authors.affiliation: Department of Large Animal Medicine and Nutrition, Utrecht University, The Netherlands.
authors.forename: C
authors.initials: C
authors.lastname: Xu
authors.forename: T
authors.initials: T
authors.lastname: Wensing
authors.forename: S
authors.initials: S
authors.lastname: Kocsis
authors.forename: A C
authors.initials: AC
authors.lastname: Beynen
mesh_terms: D000818:Animals; D002136:Calcium, Dietary; D002417:Cattle; D004063:Digestion / Q000502:physiology*; D002149:Energy Intake; D004734:Energy Metabolism; D005243:Feces / Q000737:chemistry; D008297:Male; D008460:Meat; D008892:Milk; D015430:Weight Gain
chemical_list: D002136:Calcium, Dietary