The fresh new start of eggs installing to own hens try affected by genotype, nutritional system updates and you may environmental conditions. Regional breeds (white eggshell types-Padovana and you can Polverara; tinted eggshell types-Pepoi, Ermellinata di Rovigo, Robusta Maculata and you can Robusta Lionata) from the Veneto part, in the North Italy, was in fact reared external away from spring season (six weeks of age; 6 WA) so you’re able to trip and you can wintertime. The latest start of laying ranged according to the reproduce (22–twenty-eight WA): only the shaded eggshell breeds become laying after summer/beginning of autumn, about presence away from a reducing absolute photoperiod, as well as the eggs manufacturing survived for many weeks. From the 38 WA, artificial white was gradually put in the photoperiod locate 14L:10D, at 42 WA, all half dozen breeds have been installing. To own hens reared outdoors, relations among environment, body opportunity and you will health requirements is highly recommended. The knowledge with the productive produce and you can egg quality of the regional breed hens are of help toward handling of the fresh birds as well as for an acceptable source of egg, for both business and also for brooding throughout every season.

Conceptual

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; internationalwomen.net officiell webbplats 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. Read more