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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2007 > Volume 6 Number 1 > Abdur-Rahman Awwad Al-Fataftah1 and Z.H.M. Abu-Dieyeh2

Effect of Chronic Heat Stress on Broiler Performance in Jordan

Abdur-Rahman Awwad Al-Fataftah1 and Z.H.M. Abu-Dieyeh2
1Department of Animal Production, Faculty of Agriculture, University of Jordan, Jordan 2Department of Agricultural Sciences, Al-Shouback University College, Al-Balq`a Applied University, Jordan
Abstract :

An experiment was conducted in the poultry farm of the faculty of agriculture in the campus of Jordan University to evaluate the effect of heat stress on the performance and some physiological parameters of 4-8 week old Isa Vedette broilers. Environmental temperatures in controlled environmental rooms were constant 25 (control), 30 and 35±2oC, in addition to a variable-natural temperature, 24 - 28 ± 2oC
in the open-sided poultry house. At the end of the experiment, a representative sample was randomly
selected from each treatment and exposed to heat tolerance test at 40±2oC in the environmental physiology lab. The results showed that, growth rate, body gain, feed consumption and feed efficiency were significantly (p<0.05) reduced of 4-8 week old broilers reared in hot-closed environment (30 and 35±2oC) and variablenatural temperature in open-sided environment. The heat tolerance test showed that, broilers reared at high environmental temperatures of 30 and 35±2oC had lower mortality rate and RITr than those reared at constant 25±2oC and variable-natural temperature (24 - 28oC) in closed and open-sided environment, respectively. Finally, it could be concluded that, environmental temperature above 25oC has a significant (p<0.05) negatively effects on the performance of 4-8 week-old broilers reared in open-sided poultry house particularly, during summer season. Moreover, it will increase the market age and increase the productive cost. On the other hand, broilers reared in hot environment may improve their heat tolerance, which might acquire during the acclimation at high environmental-rearing temperature.

Keywords :
Acclimatization, broiler, heat stress, Jorden, performance, temperature

Date Deposited : 14 Jul 2011 10:38

Last Modified : 14 Jul 2011 10:38

Official URL: http://www.pjbs.org/ijps/ijps.htm

Volume 6, Number 1, - 2007 , ISSN 1682-8356

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