Ultraviolet Light Effects on Productive, Physiological Performance and Immune Response of Two Developed Laying Hens

Abstract

In this experiment, a total number of 165 birds (150 female + 15 male) from each developed laying hens Silver Montaza and Matrouh layer 20 weeks old up to 40 weeks of age. All bids were weighted and randomly distributed into 5 groups with three replicates per treatment (10 females and 1 male / replicate) with almost similar initial average body weight. Each experimental group was exposed to natural day light and supplemented with Ultraviolet light as in its program light, the main group (control group) exposed to no UV light, the second, third, fourth and fifth groups were exposed to 1, 2, 3 and 4 hours/day respectively to UV light from UV lamps after sunset, and controlled by a timer as following: 1-Hens in the first treatment (Control) were exposed to sun light and yellow lamps to 17h/day without exposed to UV lamps. 2-Hens in the second treatment were exposed to sun light to sunset, UV lamps for 1h/day and supplemented with yellow lamps to the end of light period. 3-Hens in the third treatment were exposed to sun light to sunset, UV lamps for 2h/day and supplemented with yellow lamps to the end of light period. 4-Hens in the fourth treatment were exposed to sun light to sunset, UV lamps for 3h/day and supplemented with yellow lamps to the end of light period. 5-Hens in the fifth treatment were exposed to sun light to sunset and UV lamps for 4h/day without exposed to yellow lamps. Birds were reared under similar condition. The consequences indicated that live body weight (LBW), feed intake (FI), egg mass, some blood components, immune responses to sheep red blood cells were significantly improved (P≤0.05) by exposed birds to UV lamps after sunset supplemented in its program light. It could be concluded that the efficient exposed time to UV lamps was (2-3 hours/day) for silver Montaza and Matrouh developed laying hens.

Impact of Ultraviolet Light on Growth Performance, Blood Parameters and Some Behavioral Status of Broiler Chickens

“…The treatment exposed to UVB wavelength for5 hours increased live body weight compared to the LED group (control) or UVA5 and UVA10 in different ages, especially at 28 and 35 days, which the difference was significant among groups. The heaviest individuals weight were those exposed to UVB for 5 hours (2.594 kg), while the lowest individuals weight were those exposed to UVA for 10 hours (2.454 kg) at 35 day of age may be for beneficial effect of short time exposure for UV to activate some biochemical processes in the body and help for vitamin D production, while at long time exposure for UV often decreasing immune system efficient, this agreed with (Youssef et al 2019) who reported that influence of Ultraviolet radiation wavelength on environment surrounding the birds leads to improve immune system without a harmful effect in birds. Figure 1showed the live body weight during different periods of feeding (Starter, grower and finisher diets).…”