The study was aimed at determining the effects of Vitamin C and electrolyte on growth and meat yield of broilers in a hot humid environment. A total of 60 straight run day old Cobb 500 broilers were reared up to 35 days of age and fed ad libitum on a starter diet up to 12 days and thereafter, on a grower diet. The broilers were divided into 4 treatment groups. One group (15 broilers) without Vitamin C and electrolyte supplementation was considered as control. In other three groups were provided 135ppm Vitamin C, 1250ppm electrolyte and 135ppm Vitamin C + 1250ppm electrolyte in drinking water respectively as supplement. Feed intake, body weight, feed conversion and survivability were similar in broilers that received different levels of Vitamin C and electrolyte supplementation in drinking water. Feed cost per broiler and per kg broiler increased due to the addition of Vitamin C and electrolyte. Dressing yield, breast meat, total meat and wing meat were (P<0.05) higher in broilers that received Vitamin C in drinking water than those of control, electrolyte and Vitamin C + electrolyte supplemented groups. No differences (P>0.05) were found in breast: dark meat, thigh meat, drumstick meat and abdominal fat which could be attributed to either Vitamin C or electrolyte supplementation. It implies that deficiency of Vitamin C may be related to reduce meat yield of broilers in a hot humid environment. However, further experiment using several doses of Vitamin C with large number of broilers may be conducted to confirm the appropriate doses of supplementation. Keywords: Vitamin C; Electrolyte; Broiler growth; Meat yield DOI: 10.3329/jbau.v8i1.6399J. Bangladesh Agril. Univ. 8(1): 57-60, 2010
A study was undertaken to compare the seasonal effect of bio-security management intervention on productive and economic value of broiler farming reared in Pabna, Rajshahi and Kishoregonj district of Bangladesh having 30 farms in each. Data were collected from a total 90 broiler farms by using semi structured questionnaire in two different seasons (winter & summer). As per bio-security standard of broiler farm, the farms those got above 60 marks treated as bio-secured farms and below 60 marks treated as non-bio-secured farms (out of 100 marks). Of the 90 farms, 23%, 20%, 16%, 17%, 14% and 11% farms have 500,600,700,800 900 and 1000 broilers respectively. FCR of individual group maintained under bio-secured conditions, was tended to be improved compared with the non bio-secured farm. Growth performances were higher in winter compared to summer. Profitability also was found to be higher in winter compared to summer season. The return was increased with the farm sizes increased (P<0.01). Therefore, productive performance and profitability may be improved for broiler farming if bio-security intervention is made.
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