digestibilie des acides amines dans les matieres premieres alimentaires chez le poulet; kecernaan asam amino pada bahan pangan mentah pada ayam

Zuprizal, Prof. P. Jego; Prof I. NIR.; C. Fevrier

1992 | Tesis | S1 PETERNAKAN

Two techniques of excetra collection (tray and plastic bag) were compared to measure true digestibility of protein (TDP), amino acids (TDAA) and true metabolizable energy (TME) of rapeseed meals, obtained from whole seed (WRSM) and dehulled seed (DRSM). Thirty-six intact (Isa Brown) cockerels 12 months old, wee divided into two groups of 18 cockerels each. they were fasted for 24 hours and then force fed a moistened diet composed of 50% feed and 50% water. In the first group, trays were placed under cages for excreta collection, and in the second one, the plastic bags with harnesses, were attached to birds immediately after force feeding. The two techniques of fecal collection (tray and plastic bag) had no significant effect on TDP, means of TDAA of 14 amino acids and TME of WRSM and of DRSM. However true digestibility of cystine of WRSM and of DRSM were higher (P<05) for plastic bag compared to the tray technique. True digestibility value of cystine of WRSM were 79,1 and 84,9%. These result maybe explained by the fact that there was a contamination of excreta with scales and feathers in tray collection, Therefore the plastic bag technique appears to be more suitable and more precise for determining the true digestibility of amino acids in feedstuffs.

Kata Kunci : Fecal collection, Amino Acids, metabolized energy, disgestibility, rapeseed meals