Crescimento inicial de três procedências de Jatropha curcas L. inoculadas com fungos micorrízicos

Abstract

The objective of this work was to identify differences in the development of Jatropha curcas from three origins and the influence of mycorrhizal fungi. Physic-nut seedlings were produced in the Municipality of Marechal Cândi Rondon PR and by the age of 60 days they were allocated in plastic vase with a capacity of 18 L. The vases were filled with three types of soil, control (no treatment), solarized and solarized with inoculum of mycorrhizal fungi. At 60 days after sowing, morphometric and destructive analysis were performed to determine fresh and dried masses. Throughout the period of the experiment there was gathering of morphometric data in order to determine the development of seedlings. At 60 days it was possible to note there are differences in the formation of seedlings between seeds from different provenances. Among the evaluated provenances, Mato Grosso do Sul showed higher averages for almost all evaluated parameters, except for number of leaves (NF), which the highest average was for the seedling from Minas Gerais. Seedlings produced with seeds from Pernambuco showed lower values in all variables measured, including the ratio between height and collar diameter (H: DC). The differences between the studied origins persisted after planting the seedlings in vases. As to soil treatments, the presence of mycorrhizal fungi in roots influenced the development, and its absence was not favorable to the development of seedlings, showing the same behavior throughout trial and for most variables