Investigations on production traits in broiler chickens with experimental aflatoxicosis
2013
Valchev, I., Thrakia University, Stara Zagora (Bulgaria) | Hristov, Ts., Thrakia University, Stara Zagora (Bulgaria) | Lazarov, L., Thrakia University, Stara Zagora (Bulgaria) | Kanakov, D., Thrakia University, Stara Zagora (Bulgaria) | Binev, R., Thrakia University, Stara Zagora (Bulgaria) | Nikolov, Y., Thrakia University, Stara Zagora (Bulgaria)
Several poduction traits - live body weight, daily weight gain, feed conversion, daily feed consumption and relative weights - g/100 g body weight of visceral organs - liver, kidneys, heart, bursa of Fabricius, thymus, spleen, pancreas, gizzard and proventriculus were investigated in broiler chickens with experimentally induced aflatoxicosis B1. The experiments were carried out with five groups of ten 7-day-old Cobb broiler chickens in each. The groups were as followed: group I – control - fed standard compound feed according to the age and species; group II – experimental, whose feed was supplemented with 1 g/kg Mycotox NG, group III – experimental, receiving 0.5 mg/kg AFB1; group IV – experimental, receiving 0.8 mg/kg AFB1 and group V – experimental, supplemented with 0.5 mg/kg AFB1 and 1 g/kg Mycotox NG. The duration of the experiment was 42 days. The dynamics of live weight, daily weight gain, daily feed consumption and conversion were followed out on 21, 35 and 49 days of age. The differences between relative visceral organ weights between control and experimental groups were determined after the trials end. Lower live body weight, daily weight gain, daily feed consumption as well as increased feed conversion and higher relative weights of the liver, kidneys, heart, pancreas, spleen, gizzard and proventriculus were found out in groups ІІI and IV. Simultaneously, the relative weights of the thymus and bursa of Fabricius were statistically significantly reduced. The supplementation of the feed of experimental group V with 1 g/kg Mycotox NG resulted in substantial reduction of negative effects of AFB1 on production traits and visceral weights. There were no statistically significant differences between studied parameters between group II, receiving only mycosorbent, and controls.
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