The fresh onset of egg laying having hens is impacted by genotype, health body standing and you can environment standards. Local types (white eggshell types-Padovana and you may Polverara; shaded eggshell types-Pepoi, Ermellinata di Rovigo, Robusta Maculata and Robusta Lionata) regarding the Veneto area, in the Northern Italy, had been reared outside from spring (six weeks of age; 6 WA) so you can autumn and wintertime. The latest onset of laying ranged with regards to the breed (22–28 WA): just the shaded eggshell breeds already been laying at the conclusion of summer/start of autumn, throughout the exposure of a turning down natural photoperiod, therefore the eggs development lasted for some months. In the 38 WA, phony light try gradually added to the new photoperiod to track down 14L:10D, at 42 WA, the half dozen types was installing. To possess hens reared external, interactions among environment, body time and health requirements should be considered. The details with the energetic give and you will eggs quality of brand new local reproduce hens are of help towards management of new wild birds and for a sufficient way to obtain eggs, for both business and for brooding throughout every season.
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. Pokračovat ve čtení „A survey on the Eggs Development and you can Quality Depending on the Years from Four Italian Chicken Dual-Goal Purebred Hens Reared External“