Effects of Ultraviolet Rays Irradiation on Performance of Broiler Chicken 5 - 10 Weeks Old

  • Trần Đình Đông

Abstract

The present  study was aimed at estimating the effect of irradiation of ultra-violet rays on some of chicken production indicators, such as  survival rate,  mineral absorptivity,  growth rate, feed conversion ratio, production number (PN), and carcass quality. An experiment was carried out on mixed-blood (Ho x Luong Phuong x Mia) broiler chicken between 5 and 10 weeks of age . The chicken were randomly allocated into 4 groups, one being used as the control and the other three  exposed to  ultra-violet rays for 5, 8, and 11 minutes per day.  Results showed that the survival rate of chicken exposed daily to ultra-violet rays for 5-8 minutes was 8.8 - 10.5% higher than that of the control group. The proportion of crooked legs chicken decreased to 3.51% of that of the control group. Serum Ca, P , and the total mineral contents in the leg of chicken in the 3 irradiated groups were higher than those of the control (P<0.05). Furthermore, the ultra-violet rays irradiation improved chicken growth. Compared to the control group, the average live weight increased by 115 gram for chicken daily exposed to the ultra-violet rays for 5 minutes (7.7%), and 172 gram for those exposed for 8 minutes (11.5%). The ultra-violet rays irradiation also had a good effect on feed conversion ratio (FCR), which was reduced by 0.25-0.30 kg feed/ kg live weight gain. The PN of the irradiated groups was increased by 2.48-4.43 compared to that of the control group. The influence of ultra-violet rays on carcass quality was neglectable. However, the longer duration of irradiation  (11 minutes per day) had negative effects, resulting in lower survival rate, lower growth rate,  decreased PN and increased FCR
điểm /   đánh giá
Published
2013-08-02
Section
Bài viết