title: [Effect of graded nitrogen supplements on egg protein synthesis and body protein retention in broiler hens].
abstract: In the top laying period (29th/30th week of life) egg protein synthesis and protein retention in the bodies of laying hens were ascertained. Based on egg-N analyses, the relation between N-intake/live weight0.67kg and egg-N discharge/kg LW0.67kg was regressively calculated and described. The subtraction of egg-N discharge/LW0.67kg from N-balance/LW0.67kg made it possible to estimate N-retention/LW0.67kg in the body. From the intersection of this curve with the chi-axis it follows that the broiler hen meets the N-requirement for maintenance and egg production with a daily consumption of 1,264.7 mg N/LW0.67kg, which corresponds to 15.8 g crude protein, and then neither loses nor retains body protein. At a daily intake of this amount of CP (15.8 g) the broiler hen produces 44.1 g egg per day. An energy intake of more than 70 EFUhen/animal and day resulted in fat retention in the broiler hen.
mesh_terms: D000818:Animals; D001835:Body Weight; D002645:Chickens / Q000378:metabolism*; D004044:Dietary Proteins / Q000008:administration & dosage*; D004527:Egg Proteins / Q000096:biosynthesis*; D005260:Female; D009584:Nitrogen / Q000378:metabolism*; D009751:Nutritional Requirements; D010058:Oviposition; D011506:Proteins / Q000378:metabolism*
chemical_list: D004044:Dietary Proteins; D004527:Egg Proteins; D011506:Proteins; D009584:Nitrogen
vernacular_title: Untersuchungen zum Einfluss gestaffelter N-Gaben auf die Eiproteinsynthese und den Körperproteinansatz der Broilerhenne.