Data/hora: 10/06/2024 16:40:08

Provedor de dados: | 111
País: | China
Título: | The effect of a photoperiodic green light program during incubation on embryo development and hatch process
Autores: | Demmers, Theo.
Data: | 2015-04-26
Ano: | 2015
Palavras-chave: | Broiler incubation; Green light; Embryo growth; Chick quality; Hatch window; Hatching time.
Resumo: | This study was conducted to evaluate the effect of a 12 hours light, 12 hours dark  (12L:12D) photoperiod of green light during day 1 to day 18 of incubation time, on embryo growth, hatch performance and the hatch process. In the light-stimulated group, the monochromatic light was provided by a total of 204 green LEDs (522nm) mounted in a frame which was placed above the eggs to give even spread of illumination. The control group was incubated in complete darkness. Four batches of eggs (n=300 per group per batch) from fertile Ross 308 broiler breeders were used in this experiment.  The beak length and crown-rump length compared of embryos incubated under green light were significantly longer than those incubated in the dark condition at day10and day 12, respectively (P&lt;0.01). Furthermore, green light exposed embryos had a longer third toe length compared to control embryos at day 10, day14 and day17 (P=0.02).  At the group level (n=4 batches), light stimulation had no effect on chick weight and quality at take-off, the initiation of hatch and hatch window. However the individual hatching time of the light stimulated focal chicks (n=33) was 3.4h earlier (P=0.49) than then control focal chicks (n=36). The results of this study indicated that green light accelerated embryos development and resulted in an earlier hatching.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.cigrjournal.org/index.php/Ejounral/article/view/3162
Editor: | International Commission of Agricultural and Biosystems Engineering
Relação: | http://www.cigrjournal.org/index.php/Ejounral/article/view/3162/2074
Formato: | application/pdf

Fonte:

Agricultural Engineering International: CIGR Journal; 2015: Special Issue: 18th World Congress of CIGR

1682-1130