IMPROVEMENT THE PRODUCTIVE AND PHYSIOLOGICAL PERFORMANCE OF BROILER CHICKENS BY EARLY HEAT ACCLIMATION AND GLUTAMINE INJECTION | ||
| Egyptian Poultry Science Journal | ||
| Article 6, Volume 38, Issue 4, December 2018, Pages 1001-1013 PDF (547.04 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/epsj.2018.22933 | ||
| Author | ||
| yaser sedek rezk | ||
| 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. | ||
| Keywords | ||
| Early Heat shock exposures; Glutamine –broiler productive and physiological | ||
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