تأثير الإضاءة المتقطعة في بعض المؤشرات الإنتاجية للفروج

Abstract EN

This study was conducted to investigate the effect of intermittent lighting on some productive parameters of broilers.

A total of 281 one day- old broiler chicks of the hybrid coup 500 were used and divided randomly into three groups with three replicates per group.

Birds of each group were fattened in a closed section of the pen which was divided into three parts by insulated walls and they were reared on the deep litter system until the age of 49 days.

Husbandry conditions were semilar for all groups (except of lightening schedule).During the first two weeks, all chicks were exposed to a continuous lighting (day and night).

At the beginning of the third week of age, each group was exposed to three different lighting regimes; the first group (the control) was exposed to a continuous lighting regime (day and night), the second group was exposed to a continuous lighting regime during the daylight (12 h continuously) and to intermittent lighting during the night (2h light: 2h darkness), whereas the third group was exposed to an intermittent lighting regime during the daylight and during the night (1h Light: 2h darkness).

Results showed that he application of continuous lighting during the daylight and intermittent lighting at night regime on the broilers did not have any significant effect in terms of: average feed consumption, and average feed conversion ratio compared with the birds exposed to continuous lighting regime, whereas it led to significant reduced in mortality rate.

The application of continuous lighting during the daylight and intermittent lighting at night on broiler resulted in a significant improvement in the average body weight, a significant increase in the productivity efficiency and has saved of the necessary electrical power for lighting the pen by 17.9% compared to those exposed to the continuous lighting regime.