Authors : Adel Feizil, Mortaza Shahbazi, Jafar Taifebagerlu and Amin Haghigat
Abstract: For many years, researchers have been investigating the effect of high environmental temperature on the performance of different poultry species including turkeys, young chickens, broilers, broiler breeders and laying hens and have found that high environmental temperatures have deleterious effects on productive performance. The objective of this study was to assessment of effect of heat stress on production of Hy-line layers. A total of 200 Hy-line hens were selected for this study and divided into the 2 identical groups. Group 1 was kept in the environment at temperature 32-36°C and other one was kept in 27°C. Data showed that there is a significant difference among two groups in point of production rate (p<0.01 ). It can be concluded that heat stress has a marked effect on chickens especially layers as shown in present study and must kept in temperature range of 27°C to obtain maximum production rate.
Adel Feizil, Mortaza Shahbazi, Jafar Taifebagerlu and Amin Haghigat, 2012. Effect of Heat Stress (HS) on Production of Hy-Line Layers. Research Journal of Biological Sciences, 7: 206-208.