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Articles by B.H.A. Al-Qamshui
Total Records ( 2 ) for B.H.A. Al-Qamshui
  I.T. Kadim , B.H.A. Al-Qamshui , O. Mahgoub , W. Al-Marzooqi and E.H. Johnson
  The efficacy of ascorbic acid in drinking water on performance of broiler chickens under closed and open-sided houses during hot (ambient temperature 36°C) and cool (ambient temperature 23°C) seasons were studied. The temperatures inside the poultry houses were 26°C (closed), 29°C (open-sided), 32°C (closed) and 37°C (open-sided) for cool and hot seasons, respectively. One-day-old chicks (432 birds) were housed in each closed and open-sided environment for each season. Birds were maintained under 23 hrs light and 1 hr dark cycle and offered ad libitum access water and feed. Broilers in both houses were randomly subjected to four drinking water treatments (9 birds in each 6 replicates/treatment): 0, 100, 200 and 300 ppm ascorbic acid. Feed intake, body weight gain, feed conversion ratio and rectal temperatures were recorded weekly. Ascorbic acid supplementation at 200-300 ppm was associated with a reduction in rectal temperatures during the hot season. Open-sided house depressed body weight gain and feed conversion ratio (P < 0.05) during hot season. Compared to the control group, ascorbic acid improved feed intake, body weight gain and feed conversion ratio by 6%, 9% and 3% (cool season) and 8%, 11% and 5% (hot season). Birds supplemented with 200 ppm ascorbic acid had (P < 0.05) higher feed intake, body weight gain and feed conversion ratio than the control group during the cool season, while 300 ppm (P < 0.05) improved broiler performance including feed intake, body weight gain and feed conversion ratio during the hot season. Bird`s rectal temperature was higher (P < 0.05) during hot season in open-sided house and (P < 0.05) reduced by supplementing 200-300 ppm ascorbic acid. This study demonstrated that seasonal temperatures had a significant effect on broiler performance in open-sided house. Supplementation of drinking water with 200-300 ppm ascorbic acid ameliorated broiler performance in open-sided housing at high ambient temperatures.
  I.T. Kadim , B.H.A. Al-Qamshui , O. Mahgoub , W. Al-Marzooqi and E.H. Johnson
  High ambient temperature is one of the prominent stressors that elicits low meat quality characteristics in broiler meat. The effect of ascorbic acid supplementation in drinking water on meat quality of broiler chickens reared in closed and open-sided houses during hot (ambient temperature 36oC) and cool (ambient temperature 23oC) seasons were studied. Four hundred and thirty two, one-day-old chicks were used for each house across the two seasons. Birds were maintained in 23 h light and 1 h dark cycles and offered ad libitum access to water and commercial broiler diets. Broilers in both houses were randomly subjected to four drinking water treatments (9 birds in each 6 replicates/treatment): 0, 100, 200 and 300 ppm ascorbic acid. Pectoralis muscles were taken at 24 h postmortem and analyzed for ultimate pH, expressed juice, cooking loss, Warner-Bratzler shear force value, myofibril fragmentation index, sarcomere length and colour. Pectoralis muscles collected during the hot season had significantly (p<0.05) higher pH, lower expressed juice, darker colour meat (L*) than those collected during cool season group. During the hot season, meat samples from chicken reared in an open-sided house had significantly (p<0.0) higher pH and lower lightness value (L*) than those reared in a closed house. Supplementation of drinking water with various levels of ppm ascorbic acid did not significantly improve meat quality characteristics of broiler chicken reared in open-sided or closed housing at high ambient temperatures.
 
 
 
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