The aim of this study was to evaluate the effect of different proportions of forage and concentrate in diet on carcass productions, commercial cuts and edible portion of carcass in young and mature Kejobong goats. Sixteen heads of Kejobong goats were grouped into two different ages (young: 5 months old; initial body weight (BW) of 14.03 kg ±1.46 kg and mature: 9 months old; initial BW of 22.32±1.99 kg). Each group was fed pelleted ration containing different proportions of forage and concentrate (T1 = 70:30% and T2 = 30:70%) about 4% of BW in dry matter (DM) basis. All goats were slaughtered after 4 months of feeding, then carcass, commercial cuts and edible portion were separated and weighed, also yield grade value and rib eye muscle area were weighed. Data were analyzed by nested design using F-test. The results showed that carcassses, commercial cuts and edible portion of mature goats were higher than those of young Kejobong, except for yield grade and rib-eye muscle area. Goats fed T2 produced higher (P<0.05) carcass production, commercial cuts (excluded neck), edible portion of carcass, and rib-eye muscle area than those fed T1. It can be concluded that 70% of concentrate for young and mature Kejobong goats can increase the carcass production, commercial cuts, edible portion of carcass, and rib-eye muscle area.
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