FOSFATO NATURAL E BIOESTIMULANTES NA FORMAÇÃO DE MUDAS DE QUALIDADE DE Hymenaea courbaril L.

Abstract

ABSTRACT: Hymenaea courbaril L., popularly known as Jatobá, is an arboreal plant belonging to the Fabaceae family. It is a slow-growing species, requiring the influence of biostimulants and other growth promoters such as natural phosphate, to enable initial growth and the formation of a quality seedling. Therefore, the objective of this study was to evaluate the growth and quality of Jatobá (Hymenaea courbaril L.) seedlings using natural phosphate associated with a biostimulant and microorganisms. The experimental design was in randomized blocks (DBC), with six treatments and four replications. The following treatments were: 1- control, 2- rock dust (PR), 3- PR + arbuscular mycorrhizal fungi (AMF's), 4- PR + AMF's + biostimulant (FIS), 5- PR + Azospirillum brasilense (AZO), 6- PR + AZO + FIS. The variables evaluated were: stem diameter, number of leaves, height, root volume, root dry mass, leaf dry mass, stem dry mass, shoot dry mass, total dry mass, height-diameter ratio, part-length ratio root aerial and Dickson quality index. The PR+ AZO and PR+ AZO+ FIS treatments, in general, were those that provided the best results in terms of height, number of leaves, dry mass weight, shoot-root ratio, height-to-diameter ratio and Dickson quality index.