Suplementação in ovo de vitamina E e cantaxantina para embriões de frango de corte
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2017-11-09
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Universidade Federal de Goiás
Resumo
Two experiments were conducted to avaluate the effect of in ovo supplementation of
antioxidants to broiler chickens on neonatal oxidative status, incubation results, chick quality
and broiler performance. In the first experiment, five levels of vitamin E (0.0, 25.0, 35.0, 45.0
and 55.0 mg) were diluted in 0.5 mL of sunflower oil and in the second experiment five levels
were used of cantaxanthin (0.000, 0.035, 0.045, 0.055 and 0.065 mg) obtained from a
commercial product (canthaxanthin 10%), diluted with 0.5 mL of distilled water. In both
experiments were used 780 eggs, distributed in three incubators (block), 260 eggs in each.
Vitamin E supplementation improved egg hatchability, lower birth rate of chicks and better
physical quality of chicks. There was also a positive response in the small intestine weight and
villus height of the duodenum of the chicks, which provided improvement in feed conversion
for all the periods studied during the performance. The results of protein concentration in the
liver and striated muscle were higher for the chicks that received vitamin E. It was concluded
that vitamin E supplementation in ovo improves the oxidative state of the chick and this
improves the incubation results, quality of the chick and performance in the initial phase. On
the other hand, supplementation with the commercial product of canthaxanthin showed
worsening for the hatching and birth window variables, with a consequent increase in the
number of neonatal chicks with physical quality below 71 points. Supplementation of
canthaxanthin did not influence the weight or length of neonatal chicks. Furthermore, it was
possible to verify a higher amount of total proteins in the liver of the chicks supplemented with
the commercial product of canthaxanthin, it was also possible to verify improvement in the
catalase activity present in the chicks liver. It can be concluded that the commercial product is
not indicated for inoculation in ovo because it contains compounds that hinder chicks hatching.
However, the improvement in oxidative status was evident, and further studies could be
indicated with the use of pure canthaxanthin in ovo for broiler chickens.
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ARAÚJO, Itallo Conrado Sousa de. Suplementação in ovo de vitamina E e cantaxantina para embriões de frango de corte. 2017. 71 f. Tese (Doutorado em Zootecnia) - Universidade Federal de Goiás, Goiânia, 2017.