title: [The substitution of protein feed by lysine supplemented protein-rich wheat during the raising and laying periods of hens. 7. Report. Determination of the true digestibility of amino acids with and without lysine supplement in the feed].
abstract: In the present paper regression techniques were used for determing the true digestibility of amino acids from lysine-supplemented rations fed to laying hens as compared with unsupplemented rations of the same composition. 5 groups of 4 hens each were investigated receiving graded amounts of food and nutrients. The daily amounts of pellets fed per bird in group 1 to 5 were 120 gms, 100 gms, 80 gms, 60 gms and 40 gms. The quantity of lysine contained in 100 gms of the pellets was 664 mg in ration 1 and 554 mg in ration 2, the corresponding N values being 2.57 gm and 2.62 mg. The total amount of endogenic amino acids excreted per day was 128 mg per kg of body weight in birds receiving the lysine-supplemented ration and 132 mg per kg of body weight for the lysine-deficient ration. Data for the true digestibility of lysine and isoleucine were significantly higher in the case of the lysine-supplemented ration than with the lysine-deficient mixture. Lysine values were 86% and 75%, the corresponding lysine data in crude faecal proteins 4.8% and 7.1%. Generally speaking, the crude faecal protein of hens fed the lysine-deficient diet contained higher proportions of most of the essential and non-essential amino acids.
mesh_terms: D000596:Amino Acids / Q000378:metabolism; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D010367:Arachis; D002645:Chickens; D004044:Dietary Proteins; D004531:Eggs; D005260:Female; D008239:Lysine; D009584:Nitrogen / Q000378:metabolism; D013025:Glycine max; D014908:Triticum; D015003:Yeasts
chemical_list: D000596:Amino Acids; D004044:Dietary Proteins; D008239:Lysine; D009584:Nitrogen
vernacular_title: Die Substitution von Eiweissfuttermitteln durch lysinergänzten proteinreichen Weizen während der Aufzucht und Legeperiode von Hennen 7. Mitteilung Die Bestimmung der wahren Verdaulichkeit der Aminosäuren mit und ohne Lysinzusatz in den Radionen