The present research work was carried out in the poultry shed of Mr. Henry Sifuentes Castañeda, located in Barrio Miami, in the district of Yurimaguas, province of Alto Amazonas, department of Loreto, with the objective of evaluating the effect of three levels of lysine liquid, on the productive parameters in broilers in the finishing stage in Yurimaguas. 96 broiler chickens from the Cobb line were used with an average weight of 1,176 kg, which were distributed in treatments; T0: 0.0; T1:1.0; T2:1.1 and T3:1.2 % of liquid lysine, respectively. The research was of an experimental nature and a completely randomized design (DCA) was used, consisting of 4 treatments and 4 repetitions, and the comparison of means between treatments was made using the Duncan test (5%). The results that showed the liquid lysine for the weight increase variable, T3 and T2 presented a greater increase in live we...