Seedlings establishment of Eucalyptus grandis mycorrhizated with Pisolithus microcarpus (UFSC Pt 116) in sandy soil

Abstract

O objetivo deste trabalho foi avaliar a sobreviv\ueancia e o crescimento inicial de mudas de eucalipto micorrizadas com o fungo ectomicorr\uedzico Pisolithus microcarpus (UFSC Pt 116), ap\uf3s o transplante para uma \ue1rea sujeita \ue0 areniza\ue7\ue3o no munic\uedpio de S\ue3o Francisco de Assis, RS. A \ue1rea foi dividida em quatro blocos, cada qual com quatro tratamentos (turfa f\ue9rtil com e sem fungo, Neossolo Quartzar\ueanico com e sem fungo). Cada parcela foi composta por 16 mudas dispostas em quatro linhas no espa\ue7amento de 1,5 m x 1,5 m, totalizando em cada bloco 64 mudas. Aos 90 dias ap\uf3s o plantio no campo, as mudas de eucalipto produzidas no substrato turfa f\ue9rtil com fungo, apresentaram uma taxa de sobreviv\ueancia de 100%, enquanto que as produzidas em turfa f\ue9rtil sem fungo, a taxa de sobreviv\ueancia foi de 92%. As mudas produzidas no Neossolo Quartzar\ueanico com e sem fungo tiveram uma taxa de sobreviv\ueancia variando em torno de 98 e 89% respectivamente. As mudas produzidas com turfa e fungo apresentaram diferen\ue7as significativas no crescimento em altura, e di\ue2metro do caule. Conclui-se que mudas de Eucalyptus grandis produzidas em substrato turfa f\ue9rtil e micorrizadas com o isolado Pisolithus microcarpus (UFSC Pt 116), conseguem manter bom estabelecimento e desenvolvimento no campo.The aim of this work was to evaluate the survival and the initial growth of mycorrhizated eucalypts with Pisolithus microcarpus (UFSC Pt 116) ectomycorrhizal fungus, after its transplant to area subject to the arenization process in S\ue3o Francisco de Assis, RS. The area was divided into four blocks, each one with four treatments (fertile turf with and without mycorrhizae, Quartzarenic Neosoil with and without mycorrhizae). Each parcel was composed of 16 seedlings arranged in four lines in the spacing of 1,5 m x 1,5 m, totalizing in each block 64 seedlings. 90 days after the planting in the field, the eucaliptus seedlings produced in turf with fungus in the fertile substratum presented a survival rate of 100 %, whereas for those produced in fertile turf without fingi, the survival rate was 92 %. The seedlings produced in the Quartzarenic Neosoil with and without mycorrhizae had a survival rate varying around 98 and 89 %, respectively. The produced seedlings with turf and fungus showed significant differences in height and stem diameter. This study showed that the Eucalyptus grandis seedlings produced in substratum fertile turf and inoculated with the Pisolithus microcarpus (UFSC Pt 116) isolated may maintain good development and establishment in the field