rezk, Y. (2018). IMPROVEMENT THE PRODUCTIVE AND PHYSIOLOGICAL PERFORMANCE OF BROILER CHICKENS BY EARLY HEAT ACCLIMATION AND GLUTAMINE INJECTION. Egyptian Poultry Science Journal, 38(4), 1001-1013. doi: 10.21608/epsj.2018.22933
yaser sedek rezk. "IMPROVEMENT THE PRODUCTIVE AND PHYSIOLOGICAL PERFORMANCE OF BROILER CHICKENS BY EARLY HEAT ACCLIMATION AND GLUTAMINE INJECTION". Egyptian Poultry Science Journal, 38, 4, 2018, 1001-1013. doi: 10.21608/epsj.2018.22933
rezk, Y. (2018). 'IMPROVEMENT THE PRODUCTIVE AND PHYSIOLOGICAL PERFORMANCE OF BROILER CHICKENS BY EARLY HEAT ACCLIMATION AND GLUTAMINE INJECTION', Egyptian Poultry Science Journal, 38(4), pp. 1001-1013. doi: 10.21608/epsj.2018.22933
rezk, Y. IMPROVEMENT THE PRODUCTIVE AND PHYSIOLOGICAL PERFORMANCE OF BROILER CHICKENS BY EARLY HEAT ACCLIMATION AND GLUTAMINE INJECTION. Egyptian Poultry Science Journal, 2018; 38(4): 1001-1013. doi: 10.21608/epsj.2018.22933
IMPROVEMENT THE PRODUCTIVE AND PHYSIOLOGICAL PERFORMANCE OF BROILER CHICKENS BY EARLY HEAT ACCLIMATION AND GLUTAMINE INJECTION
Poult. Breed. Res. Dep., Anim. Prod. Res. Inst., Agric. Res. Centre, Min. of Agric., Giza, Egypt
Abstract
This study aimed to investigate how to enhancing the resistance of broiler chicks to hot climate by using both early heat shock exposure and glutamine injection (GI). A total of 360 male chicks, one-day old of Cobb breed were randomly distributed into equal 6 treatments each of three replicates . The experimental groups were arranged as follows: the 1st group (T1) used as a control and reared under natural conditions, the 2nd group (T2) exposed to heat challenge (33±3ºC) from one up to 38 days of age, the 3rd group (T3) exposed to early heat shock (41±1ºC for four hours from 12:00 pm till 16:00 pm for 3 consecutive days) at the 3th up to 5th days of age, the 4th group (T4) was injected with Gl 0.75 mg/kg weight at the 2th day of age, then Exposed to early heat stress shock as in T3 ,the 5th group (T5) was exposed to heat shock (41±1ºC for four hours from 12:00 till 16:00 for 3 consecutive days) at the 3th up to 5th and 15th up to 17th days of age, and the 6th group of chicks (T6) were injected with Gl (0.75 mg/kg weight) at the 2th and 14th day of age then exposed to early heat shock as T5 group.
Results revealed that live body weight , body weight gain and feed conversion ratio were improved for chicks in T4 and T6 groups than other treatments with or without significant effect. Some blood constituents , antioxidant statues and immune parameters were affected treatments. Relative heart and Gizzard weights were significantly increased for all treatments as compared with the control expect of T3 group . Results indicated that glutamine injection (0.75 mg/kg BW)at the 2th and 14th days of age for broiler chicks then exposed to induce early heat stock at the 3th up to 5th and 15th up to 17th 3 and 15 days of age might be improved productive and physiological performance during rearing period.
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