title: [Energy and nitrogen metabolism of pregnant and lactating sows and suckling piglets. 5. Energy and nitrogen metabolism of pregnant sows].
abstract: The energy and nitrogen metabolism of pregnant sows was measured with the method of indirect calorimetry in dependence on the number of gestation (1,2 and 4), on the energy supply (120, 100 and 80% of the requirement recommendation) and on the gestation stage. Values of maintenance requirement and of energy and nitrogen utilization for body deposition were calculated on the basis of results of energy and nitrogen metabolism. The energy maintenance requirement increased from 389 to 435 and 473 kJ metabolizable energy per kg LW0.75.d with rising number of gestation. The heat production increased from 85th to 115th day of gestation by 6%. The efficiency of the partial energy utilization for the energy deposition amounted to 66% on the average. The efficiency of the partial utilization of digestible nitrogen for the nitrogen deposition was calculated to 75%. The nitrogen maintenance requirement values amounted to 0.5 and 0.4 g digestible nitrogen per kg LW0.75.d in the 1st and 2nd half of gestation.
authors.affiliation: Forschungsinstitut für die Biologie landwirtschaftlicher Nutztiere, Dummerstorf-Rostock Germany.
authors.forename: M
authors.initials: M
authors.lastname: Beyer
authors.forename: W
authors.initials: W
authors.lastname: Jentsch
authors.forename: L
authors.initials: L
authors.lastname: Hoffmann
authors.forename: R
authors.initials: R
authors.lastname: Schiemann
mesh_terms: D000821:Animal Feed; D000818:Animals; D001835:Body Weight; D002153:Calorimetry, Indirect / Q000662:veterinary; D004043:Dietary Fiber; D004063:Digestion; D004326:Drinking; D002149:Energy Intake; D004734:Energy Metabolism; D005260:Female; D008098:Litter Size; D009584:Nitrogen / Q000378:metabolism*; D010298:Parity; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000378:metabolism*; D013552:Swine / Q000378:metabolism*
chemical_list: D004043:Dietary Fiber; D009584:Nitrogen
vernacular_title: Untersuchungen zum Energie- und Stickstoffumsatz von graviden und laktierenden Sauen sowie von Saugferkeln. 5. Mitteilung--Energie- und Stickstoffumsatz von graviden Sauen.