Growth response of dual purpose coloured birds as affected by housing system and nutrient regime
A.K. GIRI AND J.K. BHARDWAJ
AICRP on Poultry Breeding Department of Poultry Science
JNKVV, Jabalpur (M.P.)
Performance of two dual purpose coloured birds (G1, G2) of diversified maternal genome was evaluated for growth responses, feed efficiency and percent mortality up to 6 weeks of age under 3 dietary regimes and two housing systems viz. deep litter (H1) and cage (H2). Genotype G1 and G2 respectively were produced from normal bodied coloured dam line by crossing with normal bodied coloured sire line. Three dietary treatments formulated were considering 3 protein levels (18,20 and 22%) having isocaloric level i.e.2800 kcal ME/kg diet. Highly significant genotypic group differences were obtained for weekly body weights (1-6 weeks) and G1 was superior to G2 for growth. At 6 weeks age G1 and G2 genetic stocks were respectively weighed 972 g and 787 g in males, 800 and 654 g in females. Better growth and fee efficiency was observed under deep litter housing system. Dietary protein affected body weight at later ages (4-6 weeks) only. Significant genotype, housing system and protein effect was found for most of the weekly feed efficiency, but non significant for percent mortality. Weekly feed efficiency was improved with increased protein level of diet and 20% dietary protein favored better growth and resulted in 100% survivability in both the genetic stocks.