DENY TRAYANUS TABUN Pengarang Dr. Theresia N. I. Koni, S.Pt, M.Si Dosen Pembimbing 1 Tri anggarini Y. Foenay, S.Pt, MS Dosen Pembimbing 2 Helda, S.Pt., M.Si Penguji 2 Dr. Cytske sabuna, S.Pt., M.Si Penguji 1 Dr. Theresia N. I. Koni, S. Pt, M.Si Penguji 1 Tri anggarini Y. Foenay, S. Pt, MS Penguji 2

The purpose of this study is to find out the effect of suweg tuber flour utilization in ration on the weight and length of the digestive organs of crossbred native chickens. The study was carried out for 8 weeks and at the end of the study the chickens were fasted for 6 hours before being slaughtered and feathered. Chickens then dissected and the digestive tract were taken then separated by parts of the gastrointestinal tract. The parts of digestive tract were measured for the length and weighed of each parts. The experimental design was used Complete Randomized Design (RAL) with 4 treatments and 5 replication (P0 = rations without suweg tuber flour, P1= rations containing suweg tuber flour 5%, P2= rations containing suweg tuber flour 7.5% and P3= rations containing suweg tuber flour 10%). The results showed that the utilisation of suweg tuber flour (Amorphophallus campanulatus BL) in the crossbred native chicken ration had signiffi cant effect (P<0.01) on the weight and length of the small intestine. Meanwhile, the use of suweg tuber flour (Amorphophallus campanulatus BL) in the chicken ration has signifficant effect (P<0.05) on the weight of the pancreas and the length of the intestine, but has no effect (P>0.05) on the weight of the colon, proventiculus, gizzard and liver. It is concluded that the utilization of suweg tuber flour (Amorphophallus campanulatus BL) in crossbred native chicken rations affect the weight and length of small intestine, weight of pancreas and length of colon, but has no effect on the weight of colon, proventiculus, gizzard and liver. Keywords : suweg tuber, digestive organs, crossbred native chickens.