Evaluacion de cuatro tipos de sustratos en la propagacion sexual de Pseudobombax millei (beldaco) en el cantón Santa Rosa provincia de El Oro.

Abstract

This research evaluated four types of substrates in the sexual propagation of Pseudobombax millei (beldaco) in Santa Rosa City, El Oro province. The previously treated seeds were sown in coconut water for 12 hours. The treatments used were T1 (100% river sand), T2 (100% black soil), T3 (50% black soil + chicken manure 50%), and T4 (black soil 50% + coconut fiber 50%). Disinfection was carried out by the solarization method with intervals of four days to each substrate at a temperature of approximately 24 °C to 26 °C. After carrying out the disinfection, the units were placed under observation with 160 seeds, which were seated at a depth of 5 cm. Irrigation was applied twice a week to maintain humidity in the substrate. From the emergence of the seed, the variables were recorded as the percentage of germination, number of leaves, height, and diameter at the neck seed size at 15, 30, 45, and 60 days. A germination percentage of 80 % was obtained. Once the emergence was finished, the best pre-germination treatment was T4, composed of black soil + coconut fiber in equal proportion, and T3, consisting of black soil + chicken manure. For further investigations, it is recommended to use substrates containing different components and providing sufficient aeration.