The Inclusion Effect of Premix Additive In Joper Chicken Feed on the Morphological Body size Characteristics Irfan H. Djunaidi a) , E. Nurwahyunia), H. Muarifaha), dan M. D. Ardiansyah b)
a) Faculty of Animal Science, Universitas Brawijaya, Malang 65145, Indonesia
*irjuna[at]ub.ac.id
b) Graduated student of Faculty of Animal Science, Universitas Brawijaya
Abstract
This research was aimed to evaluate the inclusion effect of premix as a feed additive on the morphological characteristics of Joper chickens. The study executed using 192 Joper chickens reared from 21 to 56 days old. The research applied a Completely Randomized Design (CRD) with 4 treatments (T0: without premix, T1: 0.2% premix, T2: 0.3% premix, and T3: 0.4% premix) and 6 replications. Observed variables included chest circumference, femur length, tibia length, shank length, and shank circumference. Data were analyzed using ANOVA and Duncan^s Multiple Range Test for significant differences. The relationship between body size and body weight of chickens was determined through a simple linear regression test. The results showed that the addition of premix did not have a statistically significant effect on all observed parameters (T>0.05). However, there was a tendency for improvement in some treatments, particularly in T1 and T2. The highest average values were observed in T1 for shank length (86.46 mm) and shank circumference (4.13 cm), T2 for chest circumference (24.77 cm) and tibia length (114.29 mm), and T3 for femur length (83.70 mm). The conclusion of this study is that the addition of premix does not have a significant effect on the body morphology of Joper chickens. The length of the tibia can be used as the best indicator in estimating the body weight of Joper chickens. Further studies are required to assess the long-term effects of premix under different rearing conditions.
