Evaluación de tres sustratos y dos métodos pregerminativos para la multiplicación sexual de Cedrela odorata L., cantón San Miguel de los Bancos, provincia de Pichincha.

Abstract

The objective of the research was to evaluate three substrates and two pre-germination methods for the sexual multiplication of the Cedar (Cedrela odorata L.) in San Miguel de los Bancos, province of Pichincha, a Bifactorial Randomized Complete Block Design was used, with eight treatments, three repetitions, and 360 observational units, the substrates were made up of river sand, agricultural land, coconut fiber, and the pre-germination treatments Immersion of the seeds in ambient water for 24 and 48 hours. A nursery three meters high x three meters wide and 6 meters long was built, the beds were disinfected, the substrates were prepared and disinfected to proceed with sowing, and data collection was planned at 15, 30, and 45 days. However, they were carried out at 30 and 45 days because the germination period of the seeds was not 15 days. The variables evaluated were germination percentage, height, DAC, and number of leaves. The economic analysis was determined where the cost of each seedling per treatment was identified in addition to the benefit/cost that was obtained for each seedling in each treatment. Better results were obtained in the variables: germination percentage, height, DAC, and number of leaves in treatment seven, composed of (Agricultural Land (25%) + Coconut fiber (25%) + River sand (50%) + Ambient water 24 hours), regarding the benefit-cost relationship, values below 0.69 to -0.05 were obtained. It was concluded that at least one of the substrates is suitable for the germination of Cedrela. However, more losses were obtained than gains in relation to the benefit/cost. It was recommended to use recently collected seeds not to lose their viability over time.