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The acai seeds have heterogeneous germination and low growth rate between sowing and seedlings. The aim of this study was to evaluate the biometrics and gas exchange in açaí tree seedlings inoculated with rhizobacteria biofertilizers and Trichoderma asperrellum mix. The treatments consisted of the individual inoculations of six rhizobacteria isolates, a Trichoderma Mix and a control (inoculated with water) in the roots of the acai. Biometrics and biomass data were subjected to cluster analysis, and group means were compared by SNK test (P <0.05). Three groups were formed, being group 1 composed of the control, group 2 composed of rhizobacteria (R-46, R-55, R-58, R-61 and R-92) and group 3 composed of Trichoderma Mix (T06, T09, T12 and T52). The isolates of groups 2 and 3 promoted increase in growth, chlorophyll content and improvement in gas exchange parameters. The seedlings inoculated with Trichoderma asperrellum Mix promoted growth of 47% and photosynthetic performance in gas exchange parameters, 34% for A, 52% for gs, 56% for E compared to group 1. The isolate belonging to group 3 can contribute to the sustainable management of acai seedlings in nurseries, o it acts as a growth promoter and increases the photosynthetic efficiency of acai seedlings.

BIOMETRIA E TROCAS GASOSAS EM MUDAS DE AÇAIZEIRO INOCULADAS COM BIOFERTILIZANTES