PRODUCTIVE AND PHYSIOLOGICAL RESPONSE OF BROILER CHICKENS EXPOSED TO DIFFERENT COLORED LIGHT-EMITTING DIODE AND REARED UNDER DIFFERENT STOCKING DENSITIES | ||||
| Egyptian Poultry Science Journal | ||||
| Article 21, Volume 38, Issue 4, December 2018, Page 1243-1264 PDF (585.56 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/epsj.2019.23694 | ||||
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| Author | ||||
| abdelazeem fahmy abdelazeem | ||||
| Abstract | ||||
| This study intended to evaluate the effects of different light colors and stocking densities on productive and physiological performance of broiler chickens. A total number of 648 seven-day-old mixed sex broiler chicks (Ross- 308), were randomly distributed and housed into 6 treatments in three replicates for each density 10, 12 and 14 birds/m2. Treatments were exposed to incandescent light (ICL, 60 Watt) as a control, while the others were distributed according to LED colors into Red light (RL), Blue light (BL), Green light (GL), White light (WL), and Mixed light (ML) produced by a light-emitting diode (LED) with light intensity 5 watt /m2 at 37.5 lux. Interestingly, results indicate that birds reared under LED-BL and stocked at 10 bird /m2 exhibited significantly (p ≤0.05) higher productive performance than groups exposed to other light colors and densities. However, the highest livability and European production efficiency factor (EPEF) observed for birds exposed to LED-BL and reared under 10 birds / m2 compared with other groups. Also, birds exposed to LED-BL and kept under 10 birds / m2 exhibited less fear and stress response as judged by low corticosterone hormone level and increases of melatonin concentration. In addition, lymphoid organ weights and immunity titer response significantly (p ≤ 0.05) improved, when bird’s exposed to LED-BL and kept under 10 birds/ m2 compared with other experimental groups. In conclusion, this study revealed that applying LED-BL with 10 birds /m2 in broiler house is preferable to other colors and densities because it keeps the birds calmer and showed a significant positive effects on productive and physiological performance compared with other light colors and densities. | ||||
| Keywords | ||||
| Broiler chickens; light color; stocking density | ||||
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