EFFECT OF ECTOMYCORRHIZAL FUNGI ISOLATES INOCULATION IN Eucalyptus grandis Hill ex Maiden SEEDLINGS DEVELOPMENT

Abstract

No Estado do Rio Grande do Sul, os reflorestamentos de eucalipto t\ueam se concentrado em solos com baixa fertilidade natural, e o desempenho dessas mudas poder\ue1 depender da forma\ue7\ue3o da associa\ue7\ue3o ectomicorr\uedzica. Nesse trabalho, avaliou-se o efeito da inocula\ue7\ue3o dos isolados de fungos ectomicorr\uedzicos UFSC-Pt116, UFSC-Pt188 e UFSC-SA9, individualmente e em mistura, sobre mudas de Eucalyptus grandis . As avalia\ue7\uf5es foram realizadas aos 30, 45, 60, 75 e 90 dias ap\uf3s semeadura. A inocula\ue7\ue3o individual do isolado f\ufangico ectomicorr\uedzico UFSC-Pt116 promoveu maior altura e massa seca da parte a\ue9rea. As mudas inoculadas com mistura dos isolados f\ufang\uedcos UFSC-Pt116 + UFSC-Pt188 + UFSC-SA9 acumularam maior quantidade de f\uf3sforo aos 90 dias. Para os teores de nitrog\ueanio e pot\ue1ssio, e massa seca de ra\uedzes n\ue3o mostrou diferen\ue7a significativa entre os tratamentos.In the Rio Grande do Sul state, where eucalyptus reforestation is common in low fertility soils, the seedling performance may depend on the ectomycorrhizal association. In this paper, the inoculation effects of UFSC-Pt116, UFSC-Pt188 and UFSC-SA9 ectomycorrhizal fungi isolates, individually and in mixture, on Eucalyptus grandis seedlings were evaluated. Evaluations were performed at 30, 45, 60, 75, and 90 days after sowing. The individual inoculation of UFSC-Pt116 isolate promoted highest height and aerial dry mass. The seedlings inoculated with the mixture UFSC-Pt116 + UFSC-Pt188 + UFSC-SA9 accumulated highest amounts of phosphorus at 90 days. The nitrogen and potassium concentrations, and root dry mass did not show significant differences among the treatments