| Popis: |
The use of Noiler strain as commercial laying chicken is gradually becoming popular in Nigeria, however, performance of chicken is affected by strain. The pre and post point of lay characteristics of three strains of commercial pullets: Isa Brown, Nera Black and Noiler were studied using 300 day-old chicks (100 chicks per strain) purchased from local hatcheries. The birds were raised on commercial feed for ten weeks before the commencement of the study. The experimental birds were allotted into three treatments. There were four replicates per treatment and each replicate contained 25 birds. The 12 replicates were arranged in a complete randomized design. For the post point of lay study, 15 birds were randomly selected from each replicate. Commercial grower mash was fed to the three strains before the birds attained point of lay, however, layer mash was used when the birds became layers. The parameters collected for pre lay characteristics were initial weight, feed intake, body weight at 18th week, weight gain, egg weight at 24 weeks, mortality, age at first egg, weight of the first egg, age at 20% Hen Day Production (HDP). The post point of lay study lasted thirty- four weeks. The parameters considered were HDP at 24th week, average egg production, egg weight and final weight. The values obtained for feed intake, weight at 18 week, weight gain and age at 20% HDPwere significantly (P0.05) values for these parameters (63.73 and 61.09 g/bird/day; 1493.33 and 1531.25g/bird; 8.95 and 8.84 g/bird/day; 155.00 and 153.75days, respectively). Weight of first egg, mortality, age at first egg and weight of eggs at 24 week old were not significantly affected (p>0.05) by strains, however, Noiler growing pullets recorded the lowest values for these parameters. The ranges were 40.43 – 44.43g; 0.00 – 1.00%; 136.25 – 145.00d and 52.25 – 57.11g, respectively. Results of post point of lay revealed that feed intake, final weight and egg weight were affected by the strains. Noiler had highest values (132.24g/day/bird, 2.76kg/bird and 63.80g, respectively) which were significantly higher (p 0,05) pour ces paramètres (63,73 et 61,09 g / oiseau / jour; 1493,33 et 1531,25g / oiseau; 8,95 et 8,84 g / oiseau / jour; 155,00 et 153,75 jours, respectivement). Le poids du premier œuf, la mortalité, l'âge au premier œuf et le poids d'œufs à 24 semaines n'était pas significativement affecté (p> 0,05) par des souches, cependant, les poulettes de croissance noiler ont enregistré les valeurs les plus basses pour ces paramètres. Les gammes étaient de 40,43 - 44,43g; 0,00 - 1,00%; 136.25 - 145.00d et 52,25 - 57.11g, respectivement. Les résultats du post point de ponte ont révélé que la prise alimentaire, le poids final et le poids des œufs étaient affectés par les souches. Noiler avait des valeurs les plus élevées (132,24 g / jour / oiseau, 2,76 kg / oiseau et 63.80g, respectivement) qui étaient significativement plus élevées (p |
