Resumen

MORALES ALVERO, Carlos; CALANA NARANJO, Juan Miguel; CORBERA GOROTIZA, Jorge  y  RIVERA ESPINOSA, Ramón. EVALUATION OF SUBSTRATES AND ENFORCEMENT IN arbuscular mycorrhizal fungi Begonia sp. cultrop [online]. 2011, vol.32, n.1, pp. 50-62. ISSN 0258-5936.

An experiment was conducted at the department of Crop Genetics and Breeding from the National Institute of Agricultural Sciences (INCA), to evaluate the response of Begonia var. Rex depending on the substrates made up by the mixture of soil, filter cake and rice straw, as well as the application of arbuscular micorhizal fungus (EcoMic®) on the following variables: amount of leaves, leaf length, plant vigor, dry matter of roots and the aerial part, and number of spores. A randomized block design with three repetitions per treatment was used. Variables were evaluated at seven and 45 days after transplanting. Results showed that, when evaluating at seven days, there were not any significant differences between treatments for the variables: amount of leaves and leaf length; however, when evaluating at 45 days, there were significant differences between treatments. It was observed that treatments with higher values of organic matter (MO) and inoculated with mycorhizas differed significantly from the rest, concerning the variables amount of leaves and leaf length. Plant vigor, dry matter of roots and the aerial part, as well as spore number were evaluated just at 45 days after transplanting. It was also observed that plants from the treatments inoculated by mycorhizas showed higher vigor and a more intense leaf color. Regarding dry matter production in the aerial part, treatments inoculated presented the highest values and differed significantly from the rest. Concerning dry matter production in roots, it seems to depend more on the organic matter content of the substrate, in both substrates A and B inoculated or not, than on the inoculation itself. In substrates C and D, with lower organic mattter contents, mycorhizal inoculation did enhanced dry matter production. Substrates A and B inoculated presented the highest spore percentage.

Palabras clave : ECOMIC; biofertilizers; soil.

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