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naked neck chicken may be suitable for egg ration up to 33% of their requirement may improve
production at hot-humid climate. the growth rate of Sonali growing chicken under
semi-scavenging system.
490 ISLAM, M.S.; ALAM, M.R.; HOSSEN,
M.J. (Dept. of Animal Science, Bangladesh 491 ISLAM, M.S.; KAZI, M.A.I.; HOSSAIN,
Agricultural University, Mymensingh) & M.M.; AHSAN, M.A. (BCSIR Laboratories,
RASHID, M.A. (Poultry Production Research Dhaka) & HOSSAIN, A.M.M.M. (Dept. of Soil,
Division, Bangladesh Livestock Research Institute, Water and Environment, Dhaka University,
Savar, Dhaka). Effect of Balanced Supplementary Dhaka). Proopagation of Heavy Metals in Poultry
feed and Cafeteria Feeding on the Performance of Feed Production in Bangladesh. Bang. J. Sci. Ind.
Crossbred Chicken in Semi-Scavenging System. Res., 2007, 42 (4), 465-474.
Bang. J. Anim. Sci., 2006, 35 (1 & 2), 36-41.
Poultry is one of the major protein sources for
A study was conducted to. determine an effective people in Bangladesh. It is a promising sector. It
level of feed supplementation for scavenging requires large scale feed production activities.
Sonali crossbred chicken. A total of 54 Sonali There are various sources of raw materials for
(Rhode Island Red, ♂ × Fayoumi, ♀) birds of 8 poultry feed production. In many ways these
weeks old were reared in farmer's house up to 12 sources can be associated with anthropogenic
weeks of age. The birds were randomly and heavy metal pollution. It is better to monitor any
equally distributed to 3 dietary treatment groups, probable propagation of heavy metals into the food
e.g. supplementation of 24g broken rice, 14g chain through the final feeds rather than the
Soybean meal and 2g Oyster shell separately as various raw materials for feeds. Three widely used
cafeteria feeding, supplementation of 20g and 40g feeds -Usha, Fresh, and Saudi-Bangla feeds were
balanced feed (layer grower) per bird/day in T 1, T 2 selected for the study. Cadmium, lead, arsenic,
and T 3 respectively with 20% increment weekly in mercury, selenium, chromium, manganese, nickel,
all treatment groups. Body weight and feed copper, and zinc contents of all samples were
conversion (FC) found to differ significantly measured. The detected maximum and minimum
(P<0.01), while the survivability did not differ concentrations of these elements were found to be:
(P>0.05) among the treatment groups. At 12 weeks 0.1852 ppm and 0.0232 ppm for cadmium,
of age the highest body weight found in T 3 (928 g) 20.6498 ppm and 0.6019 ppm for lead, 0.7640 ppm
followed by T 2 (861g) and T 1 (715 g) and highest and 0.0069 ppm for arsenic, 0.0579 ppm and
FC was found in T 2 (2.590) followed by T 3 (5.11) 0.0116 ppm for mercury, 0.0347 ppm and 0.0069
and T l (6.80). However, there was an increase in ppm for selenium, 5.7875 ppm and 0.0926 ppm for
body weight with the provision of increment of chromium, 302.2001 ppm and 0.0695 ppm for
balanced ration supplementation at all ages. manganese, 5.1625 ppm and 0.0125 ppm for
Dressed weight also differed significantly (P<0.01) nickel, 37.5725 ppm and 0.0463 ppm for copper,
among the treatments and it was highest in T 3 and 422.3023 ppm and 0.0232 ppm for zinc. The
(55.65%), intermediate in T 2 (54.64%) and the "Poultry Feed Reference Standards, February
lowest in T 1 (53.60%). But, the other meat yield 2002", prepared by Ministry of Fisheries and
characteristics did not differ significantly (P>0.05) Livestock, Govt. of the People's Republic of
among the treatments. The current findings Bangladesh contains no standards for the heavy
suggests that supplementation of the balanced
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