Gustavo Ferreira de Oliveira

AVALIAÇÃO DO DESENVOLVIMENTO E DEPENDÊNCIA MICORRÍZICA DO JATOBÁ ( Hymenaea courbaril L.)

Family farmers in the southeastern region of Pará come over time discussing new production systems that are more appropriate to their reality for environmental conservation and sustainability. Thus, arbuscular mycorrhizal fungi can be used as a strategy to promote environmental conservation. The objective of this work was to evaluate the development and degree of mycorrhizal dependence of jatobá (Hymenaea courbaril L.) seedlings. The work was carried out in Vegetation House from nov / 2009 to Feb / 2010. The jatobá seeds were collected in the municipality of Marabá. Before planting these seeds were immersed in water for 20 minutes to remove the floury pulp and to avoid the appearance of fungi and bacteria that would harm the germination. The experimental design was completely randomized in a factorial scheme of 1 x 3 x 2 x 10, as a forest species (jatobá), three treatments of FMA inoculation (G. margarita inoculation with S. heterogama and without inoculation). Two substrates (Red Argissolo gully soil and gully soil mixed with bovine manure and vermiculite) and 10 replicates. Morphological growth parameters (height, neck diameter and number of leaves) were evaluated at 30 and 60 days after germination. While the degree of mycorrhizal dependence and sporulation were evaluated at 60 days after germination. The degree of mycorrhizal dependence of jatobá was classified as a facultative plant and the fungus with the highest sporulation rate was the species Gigaspora margarita.