الفعالية الاقتصادية للإضاءة المتقطعة في إنتاج بيض المائدة

Abstract EN

This research was Carried out in karabo poultry research unit, Agriculture Faculty, Damascus University in the period during 2012and 14 A total of 1512 one day old- chicks hybrid (Babcock B-300), hatched from white shell eggs, raised from one day old until 60 weeks old were distributed into six groups with three replicates of 63 birds in each.

Six different lighting regimes were applied.

The first group (control 1) was subjected to a step downlighting system during the growing phase and step upduring productionpha, the second group (control 2) was exposed to a short constant - step upregime, the third group was subjected to an intermittent lighting-step up regime, the fourth group was subjected to a step down - intermittentregime, the fifth group was subjected to a short constant – intermittentregime and the the sixth group was subjected to an intermittent– intermittent regime.

The average egg mass produced per hen, average of discarded eggs, marketable egg mass average produced per hen, cost of feeding utilized per hen – economical efficiency of the different lighting regimes were studied.

Results showed that the short constant - intermittent lighting regime during the growing and production phases were superior in a comparsion to those produced in the llighting regimesin controls 1 and 2, respectively.

A significant increase (812 g) in the average of the marketable egg mass per hen was observed compared with that obtained in control (1) but not with that obtained in control 2(230 g).

It was also observed that there was aprofit in the marketable eggs per hen which significantly increased by 8.9 and 10.6% in comparison to that gained in controls 1 and 2, respectively.

Furthermore a save in electricity costs which amounted to 22 and 16.2 % was recordedin comparison to that recorded in controls 1 and 2, respectively.