Propagacion sexual y asexual de las especies Verbesina crassiramea y Montanoa quadrangularis con fines de restauración en el bosque andino Las Mercedes

Abstract

This research aims to contribute to the generation of information of native species, with emphasis on the analysis of factors that may affect the production of the same nursery. Montanoa quadrangularis Schultz Bipontianu and Verbesina crassiramea SF Blake, the species studied in this research, do not arouse great interest in the timber field, but have a major potential restoration processes. The research was to evaluate the incidence of light with polisombra 60%, 85%, and full exposure in the germination process and the type of substrate, black earth, black earth with husk in proportion 1: 1, black earth with sand in proportion 1:1 and peat. For asexual reproduction by cuttings, were evaluated the part of the tree from which the sample was taken and different concentrations of auxin were used: 1500 ppm, 3000 ppm, 6000 ppm and 0 ppm. Although asexual reproduction of the species did not generate the expected results, since there was no rooting of cuttings, the trial of sexual reproduction allows to deduce the incidence of light and the substrate on germination and growth of individuals of the species , making it possible to identify some combinations or treatments that optimize production of the species in the nursery. In the results it showed that the species Montanoa quadrangularis has significant differences with respect to the factor of light as it significantlyaffects the germination percentage is thus concluded that the species respond positively to low intensities of light on the stage of germination and growth (Polisombra 85%). For the species Verbesina crassiramea there was not statistically significant differences between treatments and between the blocks with respect to germination percentage to optimize the conditions for seedling production in the nursery, so we recommend using the substrate to generate greater profitability for sexual propagation, but the seedlings have a better performance with respect to seedling quality indices (index slenderness and leaf area index specified) under shadow of 85% and a substrate of black earth.