Abstract

HURTADO NERY, V. L; GUTIERREZ CASTRO, L  and  TORRES NOVOA, D. M. DIGESTIBLE LYS INE LEVELS FOR JAPANESE QUAIL IN LAYING PHASE. Rev. Med. Vet. Zoot. [online]. 2015, vol.62, n.3, pp.49-57. ISSN 0120-2952.  https://doi.org/10.15446/rfmvz.v62n3.54941.

This research was conducted at University of the Llanos, in order to estimate the level of digestible lysine for maximum egg production. 240 quail japonica commercial line of 70 days of age and 159 ± 9 g body weight, distributed in a completely randomized experimental design, with four treatments, six replicates and 10 birds per experimental unit, during 26 weeks were used. The birds were housed in cages of galvanized wire providing 0.016 m2 / quail; each cage was equipped with linear feeder, automatic drinking and trays to collect feces. The experimental diets were pelleted, isoproteic and isocaloric with four levels of supplementation (control treatment 0.00%, 0.153%, 0.306% and 0.459%) of L-lysine-HCl (78.5%) resulting in diets with 0.916%; 1.036%; 1.156% and 1.276% of digestible lysine. The results were subjected to analysis of variance and polynomial regression. There was quadratic effect (p < 0.01) of digestible lysine levels on egg production (81.44%, 84.43%, 83.01%; 80.72%) and linear (p < 0.01) on lysine daily intake (229.2; 257.2; 285.1; and 313.5 mg). For variables egg weight (10.81; 10.46; 10.41; and 10.55 g), daily intake (25.01; 24.83; 24.71 and 24.57 g), feed conversion kg of food/dozen eggs (0.368; 0.353; 0.357; 0.365) and feed conversion food kg/kg of egg mass (2.84; 2.81; 2.86 and 2.89) there was no significant effect (p > 0.05) of digestible lysine levels in the diet. In conclusion, the requirement of digestible lysine to maximize egg production in Japanese quail is estimated at 1.079%, with diets containing 19.18% crude protein.

Keywords : amino Digestible lysine; egg production; japanese quail.

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