PENGARUH SUBSTITUSI DEDAK HALUS DALAM RANSUM KOMERSIAL TERHADAP EFISIENSI PROTEIN DAN UKURAN SALURAN PENCERNAAN PADA AYAM Ft PERSILANGAN

Abstract

Forty eight day old F. crossed chicken (Kampung male x Lohmann layer) were divided randomly into four groups. and were fed different /ekels of rice bran (RBI in commercial ration (C11)-based experimental diet. The experimental diets were : T I (080 RB - 10080 CR 1. T2(25%4 75% CR). T3 (50% RB 50% CR). and T4 175%R B' 2.580 CR I. In each group. hody g eight gain. ratio of protein efficiency, and gastrointestinal size were measured at 10 g eeks a lier the adaptation of experimental diets. and prow in digestibility and nitrogen retention %sere measured at X ace's, after the adapt:if ion of experimental diets. There sc ere no sign i licant liflvrent firming the treatments in body "eight gain. but the ratio of protein efficiency N VIC in rcased I' 0 051 ilh increasing slant notion levels of rice bran. The nitrogen retention were decreased according to the increased rice bran les els. lIng es er. the nitroam digestibility were decreased with increasing les Is orrice brm Ilse rice bran les els did not effect gastrointesf in al size of the chicken. though the intestine of rice hran.led chicken was longer than that of commercial ration-fed chicken (13.87 ca 10.92 crn/ empty body 4 tiervonb gam, Si:e, CIVISS(e1 chicken A BSTRAK Empal ptduh delapan ekor mak ay am If persi lanpan s ayam Kampuneiantan denean pet elur Lohmann) secara acak dibaginwitradi .1 kelonipok. dim masingi-maiong diberikan berbagai aras dedak halus( DH) sehagai substitusi.dalam sir at LI ransom komersial IRK I. Perlakuan ransum yang dicobakact : TI (0% DR - 100% RK), T2 125%DH 75°0 RIX). T2 (5080 DI I t 50% RK). dan T4 (75% DI I -A- 25% RK). Pada masing-masing kelompok perlakuan, pertanthalian bobot bad an. ratio elisie [1st protein. dan ukuran saiuraii pencemaan ditikur setelah 10 hari masa adapt a si dengan ransunli flan k eceMa an protein sena retensi nitrogen diamati setelah 8 hart masa adaptasi dengan ransom. Perlaktian aras substitusi 1)1-1 tidak hi:men:4:1ra nyala terhadap penambahan hobo! hadan. tetapi ratio efisiensi protein men inglsal C P-i0.051selarini clenpan aras Suhslitusi 0H. Retensi nitrogen inenurur seiring dcogan peninekatan aras DII. ineskiptin kecernaan protein teninggi didapatkan pada ransum dengan eras substitusi DII leninggi. Moran saluran pencernaan ayarn tidak dipengaruhi oleh aras substitusi DH. tetapi °sus halus avant yang mengkonsumsi ransum D11 Iebih panjang daripada usus halusayam yang mengkonsumsi ransum komersial (13.87 vs 10.92 cm/ g empty body).