Mudas de jatobazeiro (Hymenaea courbaril l.) associadas a fungos micorrízicos arbusculares e fósforo

Abstract

The symbiotic association between native fruit species with arbuscular mycorrhizal fungi (AMF) can contribute to greater growth and quality of seedlings in soils with low nutrient availability, especially phosphorus (P). Thus, the objective of this work was to evaluate the effects of inoculation with arbuscular mycorrhizal fungi and phosphate nutrition on the growth and quality of jatobazeiro (Hymenaea courbaril L.) seedlings. The experiment was carried out in a completely randomized design, in a 5x5 factorial scheme. The treatments consisted of inoculation with the AMFs: Clareoideoglomus etunicatum, Rhizoglomus heterosporum, Rhizoglomus clarum, MIX (inoculum mix) and without inoculation with FMAs, associated with five doses of P: 0, 60, 120, 180 and 240 mg kg- 1, with growth assessment at 30, 60, 90, 120 and 150 days after transplantation (DAT). At 150 DAT, biomass production, seedling quality, soil chemical analysis, mycorrhizal dependence and mycorrhizal efficiency were determined. Phosphorus did not contribute to the growth of H. courbaril seedlings. Seedlings inoculated with R. clarum and MIX had greater growth, while seedlings inoculated with R. clarum also had greater biomass accumulation. FMAs showed greater efficiency in the absence of phosphate fertilizer. The effect of the mycorrhizal association on H. courbaril is affected by phosphate fertilization, showing that H. courbaril is a kind of optional mycorrhizal association.