Jafar Mohamad* (1), Ali Nisafi (2), Mohamad Salhab (1), and Bushra Alissa (2)
(1). Lattakia Research Center, General Commission for Scientific Agricultural Research (GCSAR), Lattakia, Syria.
(2). Department of Animal Production, College of Agricultural Engineering, Tishreen University, Lattakia, Syria.
(*Corresponding author: Eng. Jafar Mohammad, E.mail: jafar202m2@gmail.com)
Received: 11/07/2022 Accepted: 28/12/2022
Abstract:
This study was conducted on 360 fertilized eggs from ROSS broilers, where the eggs were distributed homogeneously into four different treatments according to the light color applied so that Each treatment included 90 eggs, and one treatment included three replicates, 30 eggs for each replicate, with the unification of hatching and post-hatching conditions for all treatments. The treatments were subjected to different patterns of illumination: T1 (continuous darkness 0L0lux:24D), T2 (12 hours blue light vs 12 hours darkness (12LB 35lux:12D), T3 (12 hours green light vs 12 hours darkness) T4 (12LG35lux:12D), T4 (12 hours blue-green mix vs 12 hours darkness) (12LMix B+G35lux: 12D) . The results showed a significant increase in hatching percentage, hatching percentage and average weight of hatched chicks in treatments T2, T3, T4 subject to the influence of colored LED lighting in comparison with the control treatment T1 (continuous darkness), and treatment T4 (a mixture of blue and green colors) outperformed the rest of the treatments as it achieved Hatching rate of 89.23%, hatching rate of 78.41% and chick weight at hatching 43.11 g compared to the lowest values in the T1 control treatment (hatching rate of 80.15%, hatching rate of 71.12% and chick weight at hatching 41.35 g) .As for the percentage of total fetal mortality and hatching time, it decreased significantly in the colored LED treatments (T2, T3, T4) compared to control treatment T1 (continuous darkness), and the lowest percentage was in T4 treatment (a mixture of blue and green colors), as total fetal mortality was 7.13% and hatching time 480.1 hours compared to the highest values in control T1 treatment (total fetal death rate 27.62% and hatching time 89.5 hours). As for average weight of the fetus, it increased significantly in colored light treatments (T2, T3, T4) compared to control treatment T1 (continuous dark) during different stages of fetal development studied (7 days, 11 days, 19 days) and the treatment T4 achieved (the two colors mix). blue and green) had the highest average fetal weight during the three stages, it reached 1.54 g at 7 days of age, 7.68 g at 11 days of age, and 32.27 g at 19 days of age, while these values in the T1 control were (1.23 g, 6 ,42 g and 29.79 g, respectively). It is concluded from this study that the introduction of a system Colorful LED lighting alternating with darkness (12L:12D) contributes to improving the hatching process and the quality of the hatched chicks, thus achieving higher yields, which can be adopted as a new management method in poultry production chain in Syria.
Keywords: LED lights, artificial hatching, lighting system, broiler.
Full paper in Arabic: pdf