Pertumbuhan Tulang dan Produksi Karkas Broiler yang Diberi Ransum Menggunakan Sumber Protein Mikropartikel dan Tepung Umbi Dahlia

. The aim of the study was to examine the addition of dahlia tuber powder to the feed using a source of microparticle protein on the bone growth of broiler chickens. The experimental chickens used were 200 unsexed broiler strain CP 707 aged 15 days with an average weight of 493.56 ± 7.10 g. The treatment used dahlia tuber powder and source of microparticles protein (fish meal and soybean meal). The study was arranged in a completely randomized design (CRD) with 5 treatments and 4 replications, eachs 10 birds. The treatment measure T0 (Feed of protein crude 21%), T1 (Feed of protein crude 18%), T2 (Feed of source of microparticles protein with protein crude 18%), T3 (Feed of source of non-microparticles protein with protein crude 18%+dahlia tuber powder 1.2%), and T4 (Feed of source of microparticles protein with protein crude 18%+dahlia tuber powder 1.2%). The parameters measure lactic acid bacteria, pH, coliform of intestinal, calcium (Ca) retention, bone Ca mass, bone length and weight of femur and femur, carcass weight. Data were processed by analysis of variance at 5% level (p<0.05) to determine the effect of treatment and Duncan's test at 5% level (p<0.05) to determine differences between treatments. The results showed that the use source of microparticle protein and dahlia tuber powder had a significant effect (p<0.05) on lactic acid bacteria, pH, coliform of intestinal, Ca retention, bone Ca mass, tibia bone length and weight and carcass weight. But the treatment had no effect (p>0.05) on the length and weight of the femur. The conclusion was that the feeding of 18% population followed by a decrease in pH and coliform, thereby increasing Ca retention, bone Ca mass, tibia length and weight, and carcass weight, but produces the same length and weight of the femur.