[Studies with 15N-labeled lysine in colostomized hens. 2. 15N excretion in feces].
Over a period of four days colostomised hens were given 15N-lysine, and the development of 15N-excretion both in the TCA-soluble and the TCA-precipitable fraction of the faeces was measured over eight days. In both fractions the total, lysine, histidine and arginine N and 15N-excess (15N') was determined. The average apparent digestibility of 14N was 81.2% +/- 1.1% and of 15N' 93.2% +/- 0.7%. Labelled N is already excreted in faeces 3 hours after its application. The TCA-precipitable N is less strongly labelled than the TCA-soluble N. During the application of 15N' the labelling in faecal lysine is nearly one power of ten higher than in total N. The atom-% 15N' of the lysine could also be distinctly detected in arginine and histidine. The quotas of the total 15N' in faeces were 3.5% for arginine-15N' and 0.8% for histidine 15N'; 15N' can mainly be detected in the soluble fraction.
D000596:Amino Acids / Q000378:metabolism; D000818:Animals; D002645:Chickens / Q000378:metabolism*; D003125:Colostomy; D005243:Feces / Q000032:analysis*; D005260:Female; D008239:Lysine / Q000378:metabolism*; D009590:Nitrogen Radioisotopes; D011506:Proteins / Q000378:metabolism; D013997:Time Factors
D000596:Amino Acids; D009590:Nitrogen Radioisotopes; D011506:Proteins; D008239:Lysine
Untersuchungen mit 15N-markiertem Lysin bei kolostomierten Legehennen. 2. Mitteilung. 15N-Exkretion mit dem Kot.