Comunity of arbuscular mycorrhizal fungi in cultivated soil with eucalypt, pinus and native field, in sandy soil, S\ue3o Francisco de Assis, RS

Abstract

O objetivo do trabalho foi caracterizar a comunidade de esporos de fungos micorr\uedzicos arbusculares (FMAs) em cinco \ue1reas sujeitas ao processo de areniza\ue7\ue3o com cultivo de eucalipto ( Eucalyptus grandis W. Hill ex Maiden), pinus ( Pinus elliottii Engelm. var. elliottii) e campo nativo, localizada no munic\uedpio de S\ue3o Francisco de Assis, RS. A an\ue1lise da comunidade de esporos de fungos micorr\uedzicos arbusculares foi mediante a identifica\ue7\ue3o direta, indireta e da determina\ue7\ue3o do \uedndice de diversidade. As \ue1reas analisadas foram de campo nativo, bosque de eucalipto de 2 e 6 anos e de bosque de p\uednus de 2 e 12 anos de idade. Os resultados obtidos mostraram que os g\ueaneros mais encontrados foram Acaulospora , Scutellospora e Glomus . A maior diversidade de esp\ue9cies foi encontrada na \ue1rea de campo nativo, seguido pela \ue1rea de eucalipto com 2 anos de idade. A an\ue1lise de agrupamento mostrou uma semelhan\ue7a de, no m\uednimo, 70% para as esp\ue9cies de FMAs identificados via esporos e 50% para as \ue1rea estudadas.The aim of this work was to evaluate the community of arbuscular mycorrhizal fungi spores in five areas cultivated with eucalipt ( Eucalyptus grandis W. Hill ex Maiden), pinus ( Pinus elliottii Engelm. var. elliottii) and native field, in arenization process, located in S\ue3o Francisco de Assis-RS. The study of arbuscular mycorrhizal fungi spore community was carried out by direct and indirect identification and the diversity index determination. The analyzed areas were native field, 2 and 6 years-old eucalypt field and 2 and 12 years-old pinus field. The obtained results showed that the most frequent genera were Acaulospora , Scutellospora and Glomus . The highest diversity of species was found in area of native field, followed by 2 years-old Eucalyptus area. The Cluster analyses showed a similarity of the minimum 70 % to the species of FMAs identified through spores and 50 % to the areas being studied