The fresh new onset of egg laying to possess hens try impacted by genotype, health human anatomy reputation and you can environment criteria. Local breeds (white eggshell breeds-Padovana and you will Polverara; shaded eggshell breeds-Pepoi, Ermellinata di Rovigo, Robusta Maculata and Robusta Lionata) in the Veneto region, inside the North Italy, was basically reared outside away from springtime (six months old; six WA) so you’re able to fall and you will cold temperatures. The newest onset of putting ranged with respect to the breed (22–twenty-eight WA): only the tinted eggshell breeds come putting at the conclusion of summer/start of fall, about presence off a reducing pure photoperiod, plus the eggs development survived for some months. At the 38 WA, artificial white are slowly set in the new photoperiod to get 14L:10D, as well as 42 WA, every half dozen types have been laying. For hens reared outside, interactions certainly one of ecosystem, looks times and you may health conditions should be thought about. The information toward active give and you can egg top-notch the newest local breed hens are of help toward handling of the brand new wild birds and also for an adequate supply of eggs, for both sector and for brooding throughout the year.
Abstract
The month of hatching and the rearing management, especially temperature and photoperiod, are important factors for pullets and hens reared outdoors. The yield performance and egg quality of dual-purpose chicken breeds from the Veneto region (Italy), Pepoi (PP), Ermellinata di Rovigo (ER), Robusta Maculata (RM) and Robusta Lionata (RL), with different adult body weights (ABW, kg, PP = 1.3; ER = 2.3, RM and RL = 3.1), were studied, using a factorial model (4 ? 2), considering breed and age (26–33 weeks, first age, summer–autumn, under decreasing natural photoperiod-on average, 12L:12D, and 42–53 weeks, second age, winter, under implemented photoperiod-14L:10D) as the main effects and interaction.