Coenzima Q10 em dieta para codorna japonesa (Coturnix japonica doméstica) em fase de postura

Abstract

This study aimed to evaluate the productive performance of laying quails fed different levels of Coenzyme Q10 (CoQ10). The trial was installed in a completely randomized design, in a 3x3 factorial analysis scheme analyzed as repeated measures over time, with 5 replicates per treatment (12 birds per box). Factor (A) consisted of 3 treatments (T1. Without addition of CoQ10 in the diet; T2. Diet with addition of 100 mg CoQ10.kg-1 MS; T3. Diet with addition of 200 mg CoQ10.kg-1 MS). Factor (B), for three experimental periods (C1. From 1 to 28 days of supplementation; C2. From 29 to 56 days of supplementation; and C3. From 57 to 86 days of supplementation). Feed intake, laying rate, average egg weight and feed conversion were evaluated. There was no interaction between the doses of CoQ10 and the production cycles, and only the weight of the egg was not significant for the dose factor of CoQ10. Feed intake increased linearly, the laying rate and feed conversion showed a quadratic response with a maximum point at 87.43 mg CoQ10 kg-1 and 100.17 mg CoQ10 kg 1, respectively. The productive cycle factor showed a quadratic response with the maximum point of feed consumption after 53 days of experimentation, the laying rate decreased with the course of the experiment and the reverse occurred with egg weight and feed conversion. The inclusion of 100 mg CoQ10 kg-1 MS in the diet for Japanese quails, in the initial phase, increases the laying rate, which results in a better feed conversion which may indicate a possible action on reproductive physiological processes. The inclusion of 200 mg CoQ10 kg-1 DM of feed does not bring productive benefits and, due to the reduction in feed consumption, may represent the upper limit of inclusion of CoQ10 in the bird's diet.