| Popis: |
The experiment was aimed to determine the effect of body weight at maturity on the productive and reproductive performance of broiler parent stock and to suggest correct grading of uniformity. Broiler parent stock were selected and divided according to the body weight and arranged as overweight, standard weight and underweight groups, which were considered as treatments. The experiment was conducted for 20 weeks (22 to 42 weeks of age). There were three treatments and each treatment has three replications. Each replication contained 12 hens and 2 males. The birds were managed in an open sided house. Similar management facilities and environmental conditions including feeding, watering ventilation, disease control, lighting, laying facilities etc were provided. The feeds were procured from a Feed Mill (Aftab Feed Mill Ltd., Bhagalpur, Bajitpur, Kishoregonj). Strict biosecurity measures were taken to reduce infections. The eggs laid by the experimental birds were counted, weighed and selected for observing other abnormalities. There was a slight variation in egg production, egg weight, and other abnormalities for eggs between the strains. The results in both strains were more or less similar. The production performance of standard weight group birds was satisfactory and considered as better layers than other body weight treatment groups. The egg weight did not vary widely in the body weight treatment groups. The birds within the recommended body weight and the body weight within ±10% of the standard birds considered as standard group. The soft-shelled egg and egg breakage were minimum in standard weight groups Such body weight group should be maintaining under Bangladesh conditions to obtain good potentiality from broiler parents. |
