| Registro completo |
| Provedor de dados: |
CIGR Journal
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| País: |
China
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| Título: |
The effect of a photoperiodic green light program during incubation on embryo development and hatch process
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| Autores: |
Demmers, Theo
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| Data: |
2015-04-26
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| Ano: |
2015
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| Palavras-chave: |
Broiler incubation
Green light
Embryo growth
Chick quality
Hatch window
Hatching time
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| 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<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.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.cigrjournal.org/index.php/Ejounral/article/view/3162
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| Editor: |
International Commission of Agricultural and Biosystems Engineering
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| Relação: |
http://www.cigrjournal.org/index.php/Ejounral/article/view/3162/2074
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| Formato: |
application/pdf
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| Fonte: |
Agricultural Engineering International: CIGR Journal; 2015: Special Issue: 18th World Congress of CIGR
1682-1130
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