Some studies on the environmental factors affecting broiler performances in Upper Egypt /
دراسات عن العوامل البيئية المؤثرة على أداء دجاج التسمين بصعيد مصر
Ahmed Mohamed Sayed Sebaie ; Supervised Fayez Mostafa Hasanien , Zakia Attia Mohamed Ahmed
- Cairo : Ahmed Mohamed Sayed Sebaie , 2021
- 96 P . : charts ; 25cm
Thesis (M.Sc.) - Cairo University - Faculty of Veterinary Medicine - Department of Food Hygiene and Control
The current field study was conducted on 6 broiler farms located in Sohag governorate during winter, summer and autumn to figure out the impact of indoor broiler climate elements (CL) (ambient temperature (Ta.C), relative humidity (RH%) and air velocity (AV m/sec.) on the microbial load (ML) of the indoor abiotic components (AC) effects on performance indices (PI) (feed intake (FI) g/w/bird, live body weight (LBW) g/w/bird, feed conversion rate (FCR), and mortality %). The first studywas accomplished during winter.The results revealed ,the mean value of AC BL and FL was high in farm 1 vs. farm 2 .A significant difference was recorded in BL between two farms at 35days. The same means value of Ta.C was recorded in both farms. Higher RH% was recorded in farm 2. The negative correlation was recorded between Ta. C and all PI on farm 1 but with the mortality rate in farm 2. RH% was significantly correlated with LBW and FCR in farm 1, while on-farm 2 correlated with FI and FCR. AV m/sec. was negatively correlated with all PI specially mortality % in farm 1 but did not significantly affect all PI in farm 2. The second studywas carried out during summer and autumn. The results showed, during summer, a significant difference in AC BL between both farms was recorded in both farms at 7, 35 days and FL at 35 days in farm 2. Indoor Ta. C and AV m/sec were significantly correlated with FI, LBW and FCR in both farms in farm 1& 2. Indoor RH % was significantly correlated with FI, LBW, and FCR in farm1. Mean value of IAML showed a higher BL in both farms in autumn vs. summer mainly in farm 1 at 7 days & in farm 2 at 7, 21 day with significant difference. FL was higher in both farms during summer vs. autumn. The means difference in BL in autumn from AC was significant (7&21 ds) and in farm 2 at (7 &21 and 21&35 ds). The significantmean differences in AC BL and FL (7-35 ds) were recorded during autumn