RESPONSE OF THE KL104 EUCALYPTUS CLONE TO INOCULATION WITH ARBUSCULAR MYCORRHIZAL FUNGI AND BOKASHI

Abstract

The use of arbuscular mycorrhizal fungi (AMF) associated with fermented organic fertilizers has shown potential to enhance the initial growth and quality of forest seedlings. In this context, the present study aimed to evaluate the inoculation of different AMF strains combined with FertBokashi Premium® doses on the initial development of the KL104 eucalyptus clone. The experiment was conducted in a greenhouse at the Federal University of Piauí using a randomized block design in a 7 × 5 factorial arrangement, consisting of six AMF treatments [Claroideoglomus etunicatum (E1), Acaulospora morrowiae (E2), Gigaspora albida (E3), and their combinations] and a non-inoculated control, combined with five FertBokashi Premium® doses (0, 2.3, 5.6, 11.3, and 22.5 μL dm⁻³). At 90 days after planting, biometric parameters were evaluated. Significant interactions between inoculation treatments and FertBokashi doses were observed for plant height, root dry mass, root length, and mycorrhizal colonization. The strain Claroideoglomus etunicatum stood out for its high mycorrhizal colonization under low nutrient availability conditions, whereas different AMF combinations promoted improvements in seedling root development. Overall, the response of eucalyptus to mycorrhizal inoculation varied according to the FertBokashi doses applied, highlighting the combined influence of nutrient availability and symbiotic efficiency on the initial growth of the KL104 clone.