Evaluación de la propagación sexual de Cedrela odorata L. en distintos sustratos, en la parroquia La Candelaria, cantón Penipe, provincia de Chimborazo.

Abstract

The research consisted on evaluating the sexual propagation of Cedrela odorata L. in different substrates, in the parish of Candelaria, Penipe, province of Chimborazo. The pre-germinative treatments corresponded to: Control (Pa), Immersion in coconut water for 24 hours (Pb), Immersion in ambient water, for 24 hours(Pc). The substrates consisted of: 100% river sand (S1); 25% river sand + 25% black soil + 25% rice chaff + 25% chicken manure (S2) and 50% river sand; 30% black soil, 10% rice chaff; 10% chicken manure (S3). The experimental design was a Randomized Complete Block Design, with a bifactorial arrangement with 9 treatments, 4 replications and 6 seeds per experimental unit. Days and percentage of emergence, morphological characteristics of the seedlings (DAC, height, number of leaves) during 48, 75 and 120 days and the economic analysis through the partial budget methodology were evaluated. Tukey's test was used for analysis of variance at 5% significance using InfoStat software. The pre-germination treatments, immersion in coconut water for 24 hours (Pb) and immersion in ambient water for 24 hours (Pc) influenced the percentage of emergence. The best seedlings developed in the substrate (S3: 50% river sand; 30% black soil, 10% rice chaff; 10% chicken manure) with a DAC (2.37 mm), height (6.36 cm) and leaf number (5.86). The production costs for the treatments are higher than the income generated by the estimated profits from projected seedling sales for each of the treatments. The use of pre-germination treatments and substrates improves the emergence, growth and development of C. odorata. Physical and chemical analysis of the substrates is recommended.