Potentials of Genotype, Varied Levels of Roxazyme G® Enzyme and their Interaction onTwoGenetic Stocks of Commercial Broiler Chickens, I: Growth Performance and Carcass Traits

Abstract

The growth performance and carcass traits of two commercial broiler stocks were evaluated on the basis of
genotype potentials, varied levels of roxazyme G
®
enzyme and their interaction. A total of 240 day – old broiler
chicks (120 of each of Arbor acre and Marshall birds) were used for this study. The chicks were fed on four
experimental diets; 0 g/ton, 100 g/ton, 200 g/ton and 300 g/ton. Data were collected on average bodyweight,
daily weight gain, daily feed intake, daily water intake, feed conversion ratio (growth performance) and
liveweight, bled weight, defeathered weight, eviscerated weight, breast weight, thigh weight, wing weight, shank
weight (primal cuts), gizzard, kidney, heart, liver, abdominal fat (edible visceral organs) and analysed with
General Model of SAS in completely randomized designed. Results showed that Arbor acre strain was
significantly (P < 0.05) favoured for body weight, daily weight gain, daily feed intake and daily water intake
compared with Marshall birds. Birds fed diets supplemented with roxazyme G®
enzyme, especially 300 g/ton
gave a higher body weight, daily weight gain, daily feed intake and daily water intake. Also, for carcass traits,
Arbor acre had significantly (P < 0.05) higher live weight, bled weight, defeathered weight, eviscerated weight,
breast weight, thigh weight, wing weight, shank weight, kidney, heart and abdominal fat than the Marshall birds.
It can be concluded that Arbor acre birds were better in respect of growth performance and carcass traits with
enzymes interaction. Besides, enzyme inclusion levels of up to 300 g/ton made meaningful responses for growth
performance and carcass characteristics.