title: [Effect of native crude fiber on the digestibility of amino acids of laying hens of the fattening species].
abstract: One-year-old colostomised laying hens of the fattening species received 120 g of a basic ration approximately meeting their requirements (control group) and the animals of the test group 10, 20, 30 resp. 40 g wheat straw meal in addition. Straw meal admixtures of up to 30 g had no drastic influence on the apparent digestibility of amino acids. 40 g straw meal in the ration increased the excretion of the essential amino acids by 19% and of the non-essential ones (particularly glycine, zystine and serine) by 39% in comparison with the basic ration. The amount of free amino acids and of peptide in feces was significantly lower when the ration contained 20 g straw meal. On an average of the five variants checked, the amount of amino acid nitrogen soluble in TCA in the total-N in feces was 12%. Due to the partial digestion of the amino acids of the straw meal and the favourable influence of 10...20% straw meal in the ration on absorption, 2...3% additional nitrogen in the form of essential and non-essential amino acids was available to the hens in this range of admixture according to the analysis of feces.
mesh_terms: D000596:Amino Acids / Q000378:metabolism*; D000818:Animals; D001835:Body Weight; D002482:Cellulose / Q000494:pharmacology*; D002645:Chickens; D004043:Dietary Fiber / Q000494:pharmacology*; D004063:Digestion / Q000187:drug effects*; D005228:Fatty Acids, Essential / Q000378:metabolism; D005260:Female; D010058:Oviposition
chemical_list: D000596:Amino Acids; D004043:Dietary Fiber; D005228:Fatty Acids, Essential; D002482:Cellulose
vernacular_title: Einfluss nativer Rohfaser auf die Verdaulichkeit der Aminosäuren bei Legehennen der Mastrichtung.