Efecto de dos tratamientos pre germinativos y cuatro sustratos en la propagación sexual de Swietenia macrophylla King en el cantón Penipe, provincia de Chimborazo.

Abstract

In the research entitled effect of two pre-germinative treatments and four substrates on the sexual propagation of Swietenia Macrophylla KING Canton Penipe, province of Chimborazo, the pre-germinative treatment and the substrate were evaluated. Using a completely randomized block design (DBCA), with a bifactorial arrangement with four types of substrates and three pre-germinative treatments, conformed by twelve treatments, four replications and three subsamples with a total of 144 experimental units, the results showed highly significant differences indicating that there is an effect on the germination of the interaction between substrates and pre-germinative treatment. The treatments evaluated contrasted statistically among their evaluated means. For the propagation of Swietenia macrophylla KING, under conditions adverse to its place of origin, it is concluded that the substrate composed of river sand (10%), black soil (50%), rice chaff (5%) and organic fertilizer (35%), whose seeds were submerged in coconut water for 24 h, obtained a germination percentage of 81% with heights of 22, 81 cm, 2, 12 mm diameter at neck height and 8 leaves per plant with a total germinated seeds of 75%. Demonstrating that the interaction A4B2 (pre-germinative treatment * substrate) belonging to treatment T11, which provides the conditions and nutritional requirements suitable for germination, survival and vegetative development. Carrying out new research in the search for new substrates and pre-germinative treatments that raise the percentage of germination and vegetative development at low cost in this way to form a knowledge base with which to contribute to nurserymen and various forest restoration programs to continue with the preservation and production of this species. Acquire certified seeds to achieve a good germination result, if you have a good quality substrate and a seed that is not viable you would be wasting time and resources.