Evaluación de tres bioformulados en combinación con fertilización química en el desarrollo de lechuga (Lactuca sativa l.) var. crespa

Abstract

This investigation aimed to evaluate the effect of three liquid bioformulates combining them with a chemical fertilizer on the development of lettuce (Lactuca sativa L.) var. Crespa. It was carried out in Chimborazo province, Riobamba canton, Lizarzaburu parish, during 45 days, with two factors under study: bioproducts (T. harzianum, B. subtilis and T. harzianum + B. subtilis) and fertilizer dose (0%, 25%, 50%, 75% and 100%); the design was randomized complete block (RCB) with factorial arrangement (3x5) with 15 treatments and 3 replications, the application of the treatments was carried out from day 15 to 45 after transplanting. The best results were by combining T. harzianum + B. subtilis with a fertilizer dose of 75%. The lettuce reached a height of 19.15 cm, an average number of leaves of 18.35 leaves/plant, a fresh and dry weight of the root of 36.42 and 7.37 g respectively, and in fresh and dry weight of foliage of 201.67 and 53.96 g respectively. The best benefit-cost ratio was of the same combination with USD 0.67 and a profitability of 67.22%. It is concluded that the most profitable treatment was T. harzianum + B. subtilis with a fertilizer dose of 75%. Considering the averages of height, number of leaves, fresh and dry weight of root and foliage and the benefit-cost ratio, it is concluded that this is the best treatment for lettuce development.