Evaluación de tres tipos de sustratos y tres tratamientos pre-germinativos para la propagación sexual de Erythrina sp. (Porotón).

Abstract

The aim of this study was to evaluate three types of substrates and three pregerminative treatments for the sexual propagation of Poroton (Erythrina sp.); the percentage of germination, height growth and number of leaves were determined, as well as the partial budget for each treatment. A randomized complete block experimental design (RCBD) was used, with a combined bifactorial arrangement, three types of substrates and four different pregerminative treatments. The three substrates were: A1: 50 % humus, 40 % black soil, 10 % rice husk, A2: 50 % compost, 40 % black soil, 10 % rice husk and A3: 40 % sawdust, 50 % black soil, 10 % rice husk; together with three pre-germinative treatments, B1: Immersion of the seed in water for 24 hours, B2: Filing of the seed tip, B3: Immersion of the seed in hot water for 3 seconds, and as a control B4; they were separated into 12 treatments with three replications where: the emerged seedlings were counted, the height was measured and the leaves were counted at 60, 80, 100 and 135 days; an economic analysis of partial budget was also carried out. The highest germination percentage was achieved by seed tip filing, with 100% in each substrate; the plants showed better development in the substrate composed of 50% humus, 40% black soil and 10% rice husk, together with seed filing. It is concluded that the T6 treatment is economically profitable, with a marginal rate of return of 201.93%. The use of pregerminative treatments and substrates improve germination and growth of Erythrina sp. Therefore, it is recommended to use fresh seeds for better germination.