Penggunaan kadar protein berbeda pada ayam kampung terhadap penampilan produksi dan kecernaan protein

The research was conducted to find the protein level that gives the best results on the production performances of native chickens (crossed of Bangkok and Kedu chicken) on feed consumption, water consumption, body weight gain, and FCR and pro¬tein digestibility. This research constisted two steps. Firstly, the study found the best pro¬duction performances using 100 chicks (DOC) with average body weight of 36.98 ±5.50 g/chick without differentitating their sex. Secondly, using 60 months old cocks, the study invetigated the best treatment wich has a good protein digestibility. The study used a Completely Randomized Design (CRD) with five treatments namely P0=control feed (us¬ing factory feed), P1=20% of protein feed, P2=19% of protein feed, P3=18% of protein feed, and P4=17 % of protein feed. Each treatment had 5 replications. If there was found significant differences among the results, the statistical test was continued by test of Least Significant Difference (LSD). The results showed that the use of different protein levels in feed did not give significant differences (P>0.05) on feed consumption, water con¬sumption, body weight gain, and FCR. The treatment that used 19% of protein had the best value on weight gain. On the contrary, the results showed that decreasing levels of protein level on feed treatment had a highly significant effect (P