Study the production performance of Navogen Strain of Chicken and comparative analysis of its performance with other chicken types in Sri Lanka

Abstract

A study was conducted to analyse and compare the performance e of Navogen strain at Dombewela farm. The productive parameters were collected from the performance records. For the analysis 120 eggs from each chicken genetic group were selected. The parameters measured were the egg weight, shape index, shell weight, egg yolk percentage, shell thickness, yolk: albumin ratio, shell colour, shell thickness and yolk colour. The results of the study revealed thafthe age at first lay of Navogen layerwas 1g weeks. At this age 2o/o of egg production was observed. The average monthly egg production and productive period were 26+1.34 and,,14 months, respectively. weekly egg laying percent was increased from 18th to"29th wdek. Maximum egg production was observed between 26th and 29 weeks. After tfat egg laying percent was decreased by 1 .1% weekly. No significant clutch interval and broodiness were..recorded. critting rate during laying was 1 .25%. Among the total eggs collected randomly for evaluation nearly S1o/owas with brown egg shell colour. Egg shape index, egg,y'reight,yolk weight,yolk:albumin ratio and specific gravity were significantly higher (pib.os) in the eggs. of Navogen layer. No significant difference (P>0.05) was observ6d on egg sheliweight ano tfii&ness among different genetic groups except in village chicken. Further it was concluded that Navogen was performed well in terms of productive parameters and egg quality t'iritr. For further confirmation the performance of Navogen strain should be anilysed in various agroecological regions