title: [Growth studies of SMR bulls under different feeding conditions. 4. Nutrient and energy retention in the body].
abstract: In long-term feeding experiments with bulls of the species Holstein-Friesians, the relation between live weight development and nutrient and energy retention was investigated on a high, medium and low level of feeding intensity. For this purpose a total of 206 animals was butchered at the ages 0, 4, 9, 12, 15, 16.5 and 18 months and the complete bodies were analysed. This showed that fat retention was considerably more influenced by the feeding intensity than protein retention. On the basis of the same body weight the energy content per kg live weight gain is not constant but increases with the growing feeding intensity.
mesh_terms: D000367:Age Factors; D000821:Animal Feed; D000818:Animals; D001823:Body Composition; D001835:Body Weight; D002417:Cattle / Q000378:metabolism*; D004734:Energy Metabolism; D050356:Lipid Metabolism; D008297:Male; D011506:Proteins / Q000378:metabolism
chemical_list: D011506:Proteins
vernacular_title: Wachstumsuntersuchungen an SMR-Bullen bei differenzierter Fütterungsintensität. 4. Mitteilung. Der Stoff- und Energieansatz in der Körpersubstanz.