PHYSIOLOGICAL STUDIES ON BROILER CHICKS UNDER HEAT STRESS CONDITIONS
AHMED GOUDA ABD ALLAH ABD ALLAH;
Abstract
The present study was carried out at the Poultry experimental Laboratory, Department of Poultry Production, Faculty of Agriculture, Ain Shams University and Animal Production Department, National Research Centre, Dokki- Giza- during the period from July, 2013 to March, 2014.
Two experiments were conducted to investigate the effects of increasing dietary levels of chromium methionine, selenium methionine and Vitamin E either singly (Exp-1) or combination (Exp-2) and their iteraction with early heat conditioning on performance and some physiological responces in broiler chicks, reared under summer environment.
- Experiment 1
A total of 120 one day old commercial broiler chicks (Cobb) were divided into four groups with six replications, each of five chicks. The first group was the control group, the second group was fed the basal diet supplemented with organic Chromium (0.8 mg/kg diet), the third group was fed the basal diet supplemented with organic selenium (0.3 mg/kg diet) and the fourth group was fed the basal diet supplemented with vitamin E (200 IU/kg diet). At 42-d of age all groups were exposed to 41±1°C for 1h.
Growth performance, hematological parameters, plasma biochemical constituents, immune responses and heat shock protein (HSP 70) were studied.
Results obtained could be summarized as follows:
1. Live BW and BWG at 21 and 42 DOA were significantly increased (P<0.05) by dietary supplementation of vitamin E, organic selenium and organic chromium compared with the control.
2. Feed intake was significantly (P<0.05) increased and feed conversion ratio significantly improved in vitamin E, organic selenium and organic chromium fedr chicks compared with control at periods from 1 to 21 DOA; 21 to 42 and 1 to 42 DOA.
3. Haematocrit value (Ht %); haemoglobin (Hb); red blood cell count (RBC´S), mean corpuscular hemoglobin (MCH); mean corpuscular hemoglobin concentration (MCHC); mean corpuscular volume (MCV) and heterophils to lymphocytes ratios (H/L ratio), were significantly (p<0.05) improvemed in birds fed the experimental treatments compared by control either at 21 or 42 DOA.
4. Plasma total protein and globulin levels were significantly increased, by dietary supplementaion with vitamin E, organic selenium and organic chromium, respectively compared with the control.
Two experiments were conducted to investigate the effects of increasing dietary levels of chromium methionine, selenium methionine and Vitamin E either singly (Exp-1) or combination (Exp-2) and their iteraction with early heat conditioning on performance and some physiological responces in broiler chicks, reared under summer environment.
- Experiment 1
A total of 120 one day old commercial broiler chicks (Cobb) were divided into four groups with six replications, each of five chicks. The first group was the control group, the second group was fed the basal diet supplemented with organic Chromium (0.8 mg/kg diet), the third group was fed the basal diet supplemented with organic selenium (0.3 mg/kg diet) and the fourth group was fed the basal diet supplemented with vitamin E (200 IU/kg diet). At 42-d of age all groups were exposed to 41±1°C for 1h.
Growth performance, hematological parameters, plasma biochemical constituents, immune responses and heat shock protein (HSP 70) were studied.
Results obtained could be summarized as follows:
1. Live BW and BWG at 21 and 42 DOA were significantly increased (P<0.05) by dietary supplementation of vitamin E, organic selenium and organic chromium compared with the control.
2. Feed intake was significantly (P<0.05) increased and feed conversion ratio significantly improved in vitamin E, organic selenium and organic chromium fedr chicks compared with control at periods from 1 to 21 DOA; 21 to 42 and 1 to 42 DOA.
3. Haematocrit value (Ht %); haemoglobin (Hb); red blood cell count (RBC´S), mean corpuscular hemoglobin (MCH); mean corpuscular hemoglobin concentration (MCHC); mean corpuscular volume (MCV) and heterophils to lymphocytes ratios (H/L ratio), were significantly (p<0.05) improvemed in birds fed the experimental treatments compared by control either at 21 or 42 DOA.
4. Plasma total protein and globulin levels were significantly increased, by dietary supplementaion with vitamin E, organic selenium and organic chromium, respectively compared with the control.
Other data
| Title | PHYSIOLOGICAL STUDIES ON BROILER CHICKS UNDER HEAT STRESS CONDITIONS | Other Titles | دراسات فسيولوجية على دجاج التسمين تحت ظروف الإجهاد الحراري | Authors | AHMED GOUDA ABD ALLAH ABD ALLAH | Issue Date | 2015 |
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