Two trials were carried out to improve knowledge about the incubation technique of duck eggs. In the first trial, 5842 Muscovy duck eggs, laid by three duck groups (1,2,3 years old), were incubated in two different positions (horizontally or vertically positioned) and subjected to three different treatments during the setting period: control (no-wetting); daily spraying (11 d through. 30 d in water at 20°C for 60"). In the second trial, 6430 eggs obtained by crossbreeding of Muscovy duck with Pekin duck were subjected during incubation to three different treatments: control (no-wetting); daily spraying 1 (10 d through. 27 d with water at 20°C); daily spraying 2 (20 d through 27 d with water at 20°C). The results of the first trial showed that the hatching rate was influenced by treatments (spraying = submersion >control); by the position (vertically> horizontally); by the egg-laying time (beginning = middle>last); by the duck age (3>1=2). The results of the second trial showed that the hatching rate was influenced by treatments and by the egg-laying time. In both experiments the embryo mortality during the last period was reduced by cooling treatments.
Tecnologia di incubazione delle uova degli anatidi
BAGLIACCA, MARCO;PACI, GISELLA;MARZONI FECIA DI COSSATO, MARGHERITA;
1991-01-01
Abstract
Two trials were carried out to improve knowledge about the incubation technique of duck eggs. In the first trial, 5842 Muscovy duck eggs, laid by three duck groups (1,2,3 years old), were incubated in two different positions (horizontally or vertically positioned) and subjected to three different treatments during the setting period: control (no-wetting); daily spraying (11 d through. 30 d in water at 20°C for 60"). In the second trial, 6430 eggs obtained by crossbreeding of Muscovy duck with Pekin duck were subjected during incubation to three different treatments: control (no-wetting); daily spraying 1 (10 d through. 27 d with water at 20°C); daily spraying 2 (20 d through 27 d with water at 20°C). The results of the first trial showed that the hatching rate was influenced by treatments (spraying = submersion >control); by the position (vertically> horizontally); by the egg-laying time (beginning = middle>last); by the duck age (3>1=2). The results of the second trial showed that the hatching rate was influenced by treatments and by the egg-laying time. In both experiments the embryo mortality during the last period was reduced by cooling treatments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
