title: [The energy preservation requirements of growing pigs of different sexes fed normal and high protein diets. 5. Comparison with the results obtained from castrated pigs, sows and boars].
abstract: In one experiment each with castrated pigs, sows and boars (hybrid pigs of line 150), two groups of six animals received rations containing 17 and 45% crude protein resp. over the complete test period from 35 to 130 kg (castrated pigs), 150 kg (sows), 170 kg live weight (boars) and passed alternatively through a total of 60 metabolism periods on growth and 48 on maintenance level. There were significant differences between the 3 categories of animals with regard to energy maintenance requirement in the relation of 100:105:110 for castrated pigs less than sows less than boars. In contrast to the estimated values derived from previous studies for energetic maintenance requirement of 650 kJ/kg LW0.62.d the measured values for all 3 animal categories are by approximately 50% higher. The protein content did not have an influence on the maintenance requirement of metabolizable energy of the animals. The utilization of metabolizable energy of the two rations for body energy retention corresponds to the expectations with regard to its dependence on nutrients. The requirement of metabolizable energy for protein and fat retention is 1.7:1.0. The energy content of the weight gain of boars was, on average, 85% of that of castrated pigs and sows. The studies of blood parameters did not show any deviations in the parameters tested.
authors.affiliation: Forschungszentrum für Tierproduktion Dummerstorf-Rostock, Akademie der Landwirtschaftswissenschaften der DDR, Bereich Tierernährung Oskar Kellner.
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
authors.forename: H
authors.initials: H
authors.lastname: Wittenburg
mesh_terms: D000821:Animal Feed; D000818:Animals; D004044:Dietary Proteins / Q000008:administration & dosage*; D004734:Energy Metabolism; D005260:Female; D008297:Male; D009919:Orchiectomy; D012727:Sex Characteristics; D013552:Swine / Q000254:growth & development / Q000378:metabolism*; D015430:Weight Gain
chemical_list: D004044:Dietary Proteins
vernacular_title: Untersuchungen zum Engergieerhaltungsbedarf wachsender Schweine verschiedenen Geschlechts bei normalen und hohen Proteingaben. 5. Mitteilung. Vergleich der an Kastraten, Sauen und Ebern erhaltenen Ergebnisse.