The newest onset of egg laying for hens is actually affected by genotype, nutritional human anatomy condition and you can environment conditions. Regional breeds (white eggshell breeds-Padovana and Polverara; shaded eggshell breeds-Pepoi, Ermellinata di Rovigo, Robusta Maculata and Robusta Lionata) in the Veneto region, when you look at the North Italy, were reared outdoors of springtime (6 weeks old; 6 WA) to trip and winter months. The brand new onset of putting varied according to breed (22–twenty-eight WA): just the shaded eggshell types started putting at the end of summer/start of fall, regarding presence regarding a lowering sheer photoperiod, together with eggs creation live for many days. At 38 WA, fake white is actually slowly placed into the fresh photoperiod to obtain 14L:10D, at Ghananska kvinnliga personer 42 WA, most of the six types was in fact laying. To own hens reared outside, relations among ecosystem, looks opportunity and nutritional criteria is highly recommended. The details into effective give and eggs top-notch the newest regional breed hens are helpful to your management of the brand new wild birds and an adequate source of eggs, both for markets and also for brooding year round.
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. Continue reading