Programa de Estudante-Convênio de Pós-Graduação Two experiments were conducted on the premises of the sector Poultry Animal Science in the Department of Agrarian Science Center of the Federal University of Viçosa -MG, the objective was establish the relationship of digestible valine with digestible lysine (Experiment I - Chapter I) and the relationship of digestible arginine with digestible lysine (Experiment II, Chapter II) for Japanese quail posture. In the first experiment, were used 245 Japanese quail (Coturnix coturnix japonica) with 250 days of age after peak posture, body weight of 176 ± 3.5 g, distributed in a completely randomized design, with five treatments, seven repetitions and seven birds per experimental unit. Treatments consisted of a basal diet without supplementation of digestible valine (0.65%), with 16.8% crude protein and 2800 kcal metabolizable energy / kg, supplemented with five levels of L-valine (0.00, 0.051; 0.101, 0.152 and 0.202%) in substitution of glutamic acid at equivalent protein, corresponding to the relationship between digestible valine with digestible lysine of 0.65, 0.70, 0.75, 0.80 and 0.85, respectively, remained the rations isoproteic and isocaloric, being digestible lysine set at 1.00%. The variables studied were: feed intake (g / bird / day), egg production per bird day (%), egg production per bird housed (%), marketable egg production (%), egg weight (g) , egg mass (g / bird / day), feed conversion by egg mass (kg of feed / kg eggs), feed conversion per dozen eggs (kg of feed / dozen eggs), viability of birds (% ), variation in body weight (g), weight of components (g) and percentage of egg components (yolk, albumen and shell) and specific density (g/cm3). Observing a linear increase in the daily consumption of valine (P 0.05). Concluding that the ratio of digestible valine with digestible lysine of 0.65, equivalent to a daily intake of 168.4 mg of digestible valine, meeting the requirements for the production of Japanese quail. In the second experiment, were used 245 Japanese quail (Coturnix coturnix japonica) with 250 days of age after peak posture, body weight of 181 ± 1.3 g, distributed in a completely randomized design with five treatments, seven replicates and seven birds per experimental unit. Treatments consisted of a basal diet without supplementation of digestible arginine (1.01%), with 17.55% crude protein and 2800 kcal metabolizable energy / kg, supplemented with five levels of L-arginine (0.000, 0.051, 0.101, 0.151 and 0.202%) in substitution of glutamic acid at equivalent protein, corresponding to the relationship between digestible arginine with digestible lysine of 1.01, 1.06, 1.11, 1.16 and 1.21, respectively, remained the rations isoproteic and isocaloric, being digestible lysine set at 1.00%. The variables studied were the same as those mentioned for the first experiment. The relations of digestible arginine with digestible lysine did not affect the evaluated variables, except for the daily intake of arginine observed linear increase (P 0,05). Conclui-se que a relação de valina digestível com lisina digestível de 0,65, correspondendo a um consumo diário de 168,4 mg de valina digestível atende as exigências para produção de codorna japonesa. No segundo experimento, foram utilizadas 245 codornas japonesas (Coturnix coturnix japonica) com 250 dias de idade após pico de postura, peso corporal de 181 ± 1,3 g, distribuídas em delineamento experimental inteiramente casualizado com cinco tratamentos, sete repetições e sete aves por unidade experimental. Os tratamentos consistiram de uma ração basal sem suplementação de arginina digestível (1,01%), com 17,55% de proteína bruta e 2800 kcal de energia metabolizável/kg, suplementada com cinco níveis de L- arginina (0,000; 0,051; 0,101; 0,151 e 0,202%) em substituição ao ácido glutâmico, em equivalente protéico, correspondendo às relações de arginina digestível com lisina digestível de 1,01; 1,06; 1,11; 1,16 e 1,21, respectivamente, permanecendo as rações isoprotéicas e isocalóricas, sendo a lisina digestível fixada em 1,00%. As variáveis estudadas foram as mesmas que aquelas mencionadas para o primeiro experimento. As relações de arginina digestíveis com lisina digestíveis não afetaram as variáveis avaliadas, exceto para o consumo diário de arginina que observou-se aumento linear (P