Morphometric analysis of IPB-D1 chicken in free-range and intensive rearing systems in the tropics region

IPB-D1 chicken is a local chicken breed developed for meat production and fast growth. This chicken is formed from crossbreeding broiler breeds (Cobb) with 3 other local chicken breeds, Kampung, Pelung, and Sentul Chicken. It has advantages in disease resistance and body weight. In this study, IPB-D1 chickens were studied for morphometric characteristics in two (2) different rearing systems, namely free-range and intensive systems. The material used was 120 IPB-D1 roosters aged 20 weeks, consisting of 90 heads reared in the free-range system and 30 heads intensively. The method used was observation. The parameters measured were morphometric variables of chickens in free-range and intensive systems. The rearing system treatment showed no difference in femur length, tibia length, tarsometatarsus circumference, third finger length, and wing length, but showed significant differences in tarsometatarsus length, maxilla length, and cockscomb height between intensive and free-range rearing systems in the tropics. Free-range rearing can increase tarsometatarsus length and maxilla length