FUNGOS MICORR\ucdZICOS ARBUSCULARES E PROTE\ucdNA DO SOLO RELACIONADA \uc0 GLOMALINA EM \uc1REA DEGRADADA POR EXTRA\uc7\uc3O DE ARGILA E REVEGETADA COM EUCALIPTO E AC\uc1CIA

The objective of this study was to evaluate the influence of revegetation with Eucalyptus camaldulensis and Acacia mangium in pure and mixed stands in the composition and mycorrhizal fungi diversity (AMF), as well as in the production of glomalin-related soil protein (GRSP) of an area degraded by clay extraction. The experimental design used was randomized complete block with four treatments (pure stands Eucalyptus camaldulensis and Acacia mangium; mixed Eucalyptus camaldulensis + Acacia mangium; and covered with spontaneous vegetation \u2013 ADVE) and three replications. Soil samples were collected at 0-5 cm soil layer in each plot. The spores were extracted and taxonomically identified. Relative density, frequency of each species and the Shannon-Wiener, Pielou and Simpson indexes were analyzed. The GRSP (total glomalin \u2013 TG and easily extractable glomalin - EEG) was extracted with sodium citrate and quantified by the Bradford method. Abundance of AMF was higher in the degraded areas covered by weeds (spontaneous vegetation) compared to plantations; however, it showed lower species diversity. The areas of eucalypt monoculture showed a lower level of AMF diversity in relation to areas of eucalypt intercropped with Acacia. The genera Glomus and Acaulospora were the AMF, with the largest number of species. The GRSP was closely correlated with soil C and N, which observed in greater amounts in plantations in relation to the sites covered with spontaneous vegetation. Revegetation of clay extraction site promoted the reduction of AMF sporulation, while the diversity and amount GRSP increased.Esse estudo teve como objetivo avaliar a influ\ueancia da revegeta\ue7\ue3o com Eucalyptus camaldulensis e Acacia mangium , em plantio puro e consorciado, na composi\ue7\ue3o e diversidade de fungos micorr\uedzicos arbusculares (FMAs), bem como na quantidade da prote\uedna do solo relacionada \ue0 glomalina (PSRG) em uma \ue1rea degradada pela extra\ue7\ue3o de argila. O delineamento experimental utilizado foi o de blocos casualizados com quatro tratamentos (plantios puros de Eucalyptus camaldulensis e Acacia mangium; cons\uf3rcio de Eucalyptus camaldulensis + Acacia mangium; e \ue1rea degradada com vegeta\ue7\ue3o espont\ue2nea \u2013 ADVE) e tr\ueas repeti\ue7\uf5es, onde, em cada uma das parcelas, foram coletadas amostras de solo na camada 0-5 cm. Os esporos de FMA foram extra\ueddos e taxonomicamente identificados. Analisou-se a densidade relativa, a frequ\ueancia de cada esp\ue9cie e os \uedndices de Shannon-Wiener, Pielou e de Simpson. A PSRG (glomalina total \u2013 GT e glomalina facilmente extra\uedvel \u2013 GFE) foi extra\uedda com citrato de s\uf3dio e quantificada pelo m\ue9todo de Bradford. A abund\ue2ncia de FMAs foi maior na \ue1rea degradada com vegeta\ue7\ue3o espont\ue2nea quando comparada aos plantios, em contrapartida apresentou baixa diversidade de esp\ue9cies. As \ue1reas de eucalipto em monocultivo mostraram menor \uedndice de diversidade de FMAs em rela\ue7\ue3o \ue0s \ue1reas de eucalipto consorciadas com a ac\ue1cia. Glomus e Acaulospora foram os g\ueaneros de FMAs que apresentaram o maior n\ufamero de esp\ue9cies. A PSRG foi estreitamente correlacionada com o C e o N do solo, tendo sido observada em maiores quantidades nos plantios, em rela\ue7\ue3o \ue0 ADVE. A revegeta\ue7\ue3o da cava de extra\ue7\ue3o de argila promoveu redu\ue7\ue3o na esporula\ue7\ue3o dos FMAs, enquanto a diversidade e a quantidade de PSRG foram aumentadas