Influence of light on the hematology, lymphoid organs and production of the broilers
2013
Mustafa, Y.S. (Provincial Diagnostic Lab., Lahore (Pakistan)) | Muneer, M.A. (National Agricultural Research Centre, Islamabad (Pakistan). National Program for the Control and Prevention of Avian Influenza)
Effect of light stress at various time intervals on broiler chicks was studied during January- February, 2010 by rearing a total of 400, one-day-old Hubbard x Hubbard experimental chicks at Department of Microbiology, University of Veterinary and Animal sciences, Lahore, Pakistan. It was observed that light stressed birds had showed non-significant (P greater than or equal to 0.05) difference on blood cells population except lymphocytes percentage was found higher in groups D (61.4 plus minus 1.16) than group C. The effect on lymphoid organs studied and the mean thymus weight (gm) of chicks in group B (1.90 plus minus 0.53) was adversely effected as the chicks in this group had significantly (P less than or equal to 0.05) lower mean thymus weight than groups D (4.64 plus minus 0.74) and E (4.34 plus minus 0.25) indicating that increase in the period of off-light in chicks adversely effected the mean thymus weight and chicks reared on 24 hr light had higher mean thymus weight. The bursa mean weight (gm) of group B (0.43 plus minus 0.05) was significantly (P less than or equal to 0.05) lower as compared to group D (1.59 plus minus 0.17). The spleen mean weight (gm) of group D (1.88 plus minus 0.15) was significantly (P less than or equal to 0.05) higher than group B (1.18 plus minus 0.08). The FCR values were significantly (P less than or equal to 0.05) different among groups in 6th week and there was non-significant (P greater than or equal to 0.05) difference among groups with treatment of Vitamin C, Vitamin E and glucose.
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