Untersuchungen zum N-Umsatz Wachsender Broiler in Abhängigkeit von Differenzierten Zulagen an DL-Methionin und Tanninsäure zu Unterschiedlichen Ackerbohnensorten

Publisher Website
Google Scholar
Abstract
Horse bean varieties Erfordia, Fribo, Weissbluhende and broad bean Juno were tested as sole protein sources with different supplements of DL-methionine and tannic acid in N-balance experiments with 72 3-wk-old broiler chickens. In the performance range with DL-methionine supplements to rations of 0.35%, significantly negative relations between tannin content and protein quality could be ascertained. Physiologic efficiency (PNu) decreased by 15 units per tannin-percent. Without the admixture of tannic acid and with a comparable content of S-containing amino acids the white-flowering horse bean showed better results than horse bean Fribo regarding characteristic data of protein utilization. Since N-utilization was not more effective, the superiority of the white-flowering horse bean must result from better digestibility which can possibly be traced back to lower metabolic fecal N excretion in contrast to Fribo, which is richer in tannin.