Evaluación de tres tratamientos pre-germinativos de Magnolia pastazaensis (Jaramillo y Buenaño), con tres tipos de sustratos a nivel de campo en Orellana, Loreto

Abstract

The evaluation of three pre-germination treatments was carried out (B1: control, B2: immersion in distilled water at room temperature for 48 hours and B3: Drying in the sun for 48 hours) and three substrates (A1 = Forest soil 50% + soil black 25% + soil from agroforestry systems 25%, A2= Universal Substrate 100% and A3 Peat 25% + black soil 25% + Forest soil 50%), for the sexual reproduction of Magnolia pastazaensis (Jaramillo and Buenaño) in San Vicente de Huaticocha, Loreto City, Orellana Province. A randomized complete block design with a factorial structure with two factors, 9 treatments and 3 repetitions were used. None of the treatments had effects on germination. Data on the germination percentage was recorded 49 days after sowing and plant development, such as height, diameter at neck height, number of leaves, at 60 and 120 days. A bar diagram was used for the descriptive analysis. The emergency percentage taken at 49 days gave extremely low results, giving us a percentage of 4.23%. Regarding the development of the plants. It was found that the best substrate evaluated after 120 days was T9 made up of Peat (25%) + Black soil (25%) + Forest soil (50%) plus the pre-germinative treatment (Drying in the sun for 48 hours) resulting in diameter at neck height (DAC) (4 mm), height (16 cm), number of leaves (12 leaves). It is concluded that the T9 treatment demonstrated the best results, diameter at neck height, height and number of leaves. Seedling producers who wish to propagate this species are recommended to use a substrate composed of Peat + Black soil + Forest soil, and use the pre-germinative treatment (Seeds dried in the sun for 48 hours) obtaining good results in germination and growth.