title: [The energy metabolism of growing swine in the body weight range of 10-50 kg. 2. Nitrogen and energy metabolism].
abstract: Investigations were carried out about nitrogen and energy metabolism feeding rations with 17-24 and 44-47% crude protein content on maintenance and growing level to castrated male hybrid pigs of line 150. In growing periods the N deposition amounted to 10 g/animal.d (15 kg live weight), 18 g/animal.d (30 kg LW) and 21 g/animal.d (greater than 40 kg LW) on lower protein feeding level. In experiments with higher protein feeding level the corresponding results were 17, 22 and 22 g N deposition/animal.d. The partial utilization of metabolizable energy for deposition amounted to 70% for the rations with 17-24% protein content and to 59% for the rations with 44-47% protein content, without correlation to the animals development and the alternation in the protein feeding level. The results of regression analysis about maintenance requirement were 814, 775 and 806 kJ metabolizable energy/kg LW0.62.d in trials feeding rations with 17-24% crude protein content as well as 764, 846 and 818 kJ metabolizable energy/kg LW0,62.d in trials feeding rations with 44-47% crude protein content. 1,5-1,8 MJ metabolizable energy were used per MJ protein energy deposition and 1,3-1,4 MJ per MJ fat energy deposition respectively. The energy deposition per kg live weight gain amounted to values between 9 (10 kg LW) and 18 MJ (60 kg LW).
authors.affiliation: Forschungszentrum für Tierproduktion Dummerstorf-Rostock, Bereich Tierernährung, Oskar Kellner.
authors.forename: W
authors.initials: W
authors.lastname: Jentsch
authors.forename: L
authors.initials: L
authors.lastname: Hoffmann
authors.forename: M
authors.initials: M
authors.lastname: Beyer
mesh_terms: D000821:Animal Feed; D000818:Animals; D001835:Body Weight; D004044:Dietary Proteins / Q000008:administration & dosage; D004734:Energy Metabolism; D008297:Male; D009584:Nitrogen / Q000378:metabolism*; D013552:Swine / Q000254:growth & development / Q000378:metabolism*
chemical_list: D004044:Dietary Proteins; D009584:Nitrogen
vernacular_title: Untersuchungen zum Energieumsatz wachsender Schweine im Lebendmassebereich von 10-50 kg. 2. Mitteilung. Stickstoff- und Energieumsatz.