16 research outputs found

    NATIVE COLLEMBOLA REPRODUCTION IN LABORATORY CONDITIONS

    Get PDF
    Estudos utilizando a fauna ed\ue1fica como bioindicador da qualidade do solo t\ueam sido de grande import\ue2ncia para entender as varia\ue7\uf5es f\uedsicas, qu\uedmicas e biol\uf3gicas de ecossistemas. Dentre os organismos estudados, os col\ueambolos constituem um dos principais grupos. Este trabalho teve como objetivo avaliar a multiplica\ue7\ue3o de col\ueambolos nativos em condi\ue7\uf5es de laborat\uf3rio. Como substrato, utilizaram-se amostras de solo coletadas em \ue1rea de citrus e bosque de pinus, com os tratamentos: a) amostra de solo de \ue1rea de c\uedtrus com palha de ervilhaca mo\uedda, palha de milho mo\uedda, palha de nabo mo\uedda, cama de avi\ue1rio mo\uedda e amostra de solo e, b) em solo de bosque de pinus com: palha de ervilhaca mo\uedda, palha de milho mo\uedda, palha de nabo mo\uedda, cama de avi\ue1rio mo\uedda e amostra de solo. Os tratamentos foram mantidos em potes pl\ue1sticos, a 26\ub0C, no escuro, sendo realizadas cinco avalia\ue7\uf5es durante o per\uedodo de 180 dias. O solo de pomar de c\uedtrus com adi\ue7\ue3o de palha de nabo mo\ueddo favoreceu a reprodu\ue7\ue3o destes organismos em condi\ue7\uf5es de laborat\uf3rio.The use of soil fauna as soil quality indicator has been of great importance to understand the biological, chemical and physical variations of ecosystems. The collembola takes part in a group of organisms that has an active participation in organic material transformations of soil. The aim of this work was to evaluate the collembola reproduction in laboratory condition. The used substrate was sample of soil collected from citrus and pinus area with the following treatments: a) citrus soil with: common vetch ground straw, corn ground straw, turnip ground straw, broiller litter and in soil and, b) pinus soil with: common vetch ground straw, corn ground straw, turnip ground straw, broiller litter and in soil. The treatments were maintained in plastic pots at 26\ub0C in the darkness, during 180 days, with five repetitions. The soil material from citrus area with turnip ground straw favored the collembola reproduction in laboratory conditions

    ESSENTIAL OIL OF Eucalyptus grandis Hill ex Maiden IN STIMULATING MYCORRHIZAL SIBIPIRUNA SEEDLINGS ( Caesalpinia peltophoroides Benth.)

    Get PDF
    Os metab\uf3litos secund\ue1rios extra\ueddos de esp\ue9cies florestais formadoras de ectomicorrizas podem estimular a simbiose entre fungos ectomicorr\uedzicos e esp\ue9cies florestais nativas do Rio Grande do Sul. O objetivo deste trabalho foi determinar o efeito do \uf3leo essencial de eucalipto na forma\ue7\ue3o de associa\ue7\ue3o ectomicorr\uedzica e no crescimento de mudas de sibipiruna, em condi\ue7\uf5es de casa de vegeta\ue7\ue3o. Pl\ue2ntulas de sibipiruna foram submetidas a quatro tratamentos constitu\ueddos pela presen\ue7a e aus\ueancia do in\uf3culo ectomicorr\uedzico Pisolithus microcarpus (Cooke & Massee) e aplica\ue7\ue3o ou n\ue3o do \uf3leo essencial de eucalipto. O \uf3leo essencial foi solubilizado e aplicado com pulverizador manual nos per\uedodos de 0, 7 e 14 dias a contar da data de transplante das pl\ue2ntulas. Utilizou-se o delineamento inteiramente casualizado com sete repeti\ue7\uf5es. Decorridos 90 dias de crescimento, as mudas foram coletadas e avaliou-se altura, di\ue2metro do colo, comprimento de ra\uedzes, massa seca da parte a\ue9rea e porcentagem de coloniza\ue7\ue3o micorr\uedzica. A aplica\ue7\ue3o do \uf3leo essencial de eucalipto favoreceu a ocorr\ueancia de associa\ue7\ue3o ectomicorr\uedzica, com Pisolithus microcarpus em mudas de sibipiruna, proporcionando aumento significativo no desenvolvimento da parte a\ue9rea das mudas.The secondary metabolites extracted from forest species forming ectomycorrhizal could stimulate the symbiosis between ectomycorrhizal fungi and natives forest species of Rio Grande do Sul state. The aim of this work was to evaluate ectomycorrhizal association and the seedlings growth of inoculated and non-inoculated Sibipiruna with Pisolithus microcarpus (Cooke & Massee) ectomycorrhizal fungus and submitted and not submitted to the application of the essential oil of Eucalyptus grandis , in greenhouse conditions. The essential oil was solubilized and applied with manual spray during periods of 0, 7 and 14 days from the date of seedlings transplanting. A randomized design with seven repetitions was used. After 90 days of plant growth, it was evaluated the seedling colonization degree, the height, the stem diameter, the root length and the dry mass of shoots. The eucalyptus essential oil stimulates the occurrence of ectomycorrhizal on Sibipiruna seedlings, thus providing high seedling development when inoculated with Pisolithus microcarpus

    ECTOMYCORRHIZAL IN Apuleia leiocarpa (Vogel) J.F. Macbride AND Peltophorum dubium (Sprengel) Taubert IN VITRO1

    Get PDF
    A associa\ue7\ue3o de fungos ectomicorr\uedzicos com ess\ueancias florestais nativas pode ser uma alternativa para melhorar a adapta\ue7\ue3o e desenvolvimento de mudas em \ue1reas reflorestadas do Estado do Rio Grande do Sul. O objetivo deste trabalho foi caracterizar e identificar associa\ue7\uf5es ectomicorr\uedzicas em pl\ue2ntulas de gr\ue1pia ( Apuleia leiocarpa ) e canaf\uedstula ( Peltophorum dubium ), em condi\ue7\uf5es de laborat\uf3rio. Quatro tratamentos de inocula\ue7\ue3o com isolados de fungos ectomicorr\uedzicos foram utilizados para a gr\ue1pia: UFSM RA 2.8 (Suillus sp.), UFSM RA 3.6, UFSC-Pt116 (Pisolithus microcarpus ), UFSC-Pt24 ( Pisolithus sp.), al\ue9m de um tratamento controle, sem fungo. Para a canaf\uedstula, foram utilizados quatro isolados: UFSM RA 2.8, UFSC-Pt116, UFSC-Sc 124 ( Scleroderma citrinum Pers.) e UFSC-Pt24 (Pisolithus sp.) e um tratamento sem fungo. Em ambas as ess\ueancias florestais foi utilizado delineamento inteiramente casualizado com sete repeti\ue7\uf5es por tratamento. Para o desenvolvimento vegetal, avaliaram-se as seguintes vari\ue1veis: altura de planta, massa fresca da parte a\ue9rea e do sistema radicular, massa seca da parte a\ue9rea e presen\ue7a de coloniza\ue7\ue3o ectomicorr\uedzica. Observaram-se ectomicorrizas nas pl\ue2ntulas de gr\ue1pia inoculadas com o isolado UFSM RA 2.8 (Suillus sp.). Esse fungo tamb\ue9m favoreceu o desenvolvimento das pl\ue2ntulas de gr\ue1pia, como a altura de pl\ue2ntulas e massa fresca e seca da parte a\ue9rea, embora n\ue3o foi estatisticamente diferente aos demais isolados. As pl\ue2ntulas de canaf\uedstula apresentaram ind\uedcios de forma\ue7\ue3o ectomicorr\uedzica, como a presen\ue7a do manto f\ufangico.The ectomycorrhizal fungi association with native forest essences could be an alternative to improve the adaptation and the development of seedlings in reforested areas of Rio Grande do Sul State. The aim of this work was to identify and to characterize the ectomycorrhizal associations in Apuleia leiocarpa and Peltophorum dubium seedlings, under laboratory conditions. Four inoculation treatments with ectomycorrhizal isolates were used to Apelui leiocarpa: UFSM RA 2.8 (Suillus sp.), UFSM RA 3.6, UFSC-Pt116 (Pisolithus microcarpus ) and UFSC-Pt24 ( Pisolithus sp.) and one uninoculated as control. For P. dubium, were used the isolates UFSM RA 2.8 UFSC-Pt116, UFSC-Sc124 ( Scleroderma citrinum Pers.) and UFSC-Pt24 (Pisolithus sp.), and control. For both forest essences there were seven replicates per treatment. It was analyzed the following parameters: height of plants, fresh matter of shoots and roots, dry matter of shoots and roots and presence of ectomycorhizal colonization. Ectomycorrhizas were observed in Apuleia leiocarpa seedlings inoculated with the isolate UFSM RA 2.8 (Suillus sp.). This fungus also improved seedlings growth, as height of plants, fresh and dry matter of shoots, although, it was not statistically different from the other isolates. Seedlings of Peltophorum dubium presented evidences of ectomycorrhizal formation, like the presence of a fungal mantle

    POTENTIAL ASSOCIATION WITH SEEDLINGS Pisolithus microcarpus Corymbia citriodora IN SOIL CONTAMINATED WITH ZINC

    Get PDF
    O uso de plantas com potencial de associa\ue7\ue3o com microrganismos \ue9 uma pr\ue1tica frequente em solos contaminados por metais pesados, considerada de baixo custo e ambientalmente correta. O trabalho objetivou avaliar o crescimento do Corymbia citriodora (Hook.) K.D. Hill & L.A.S. Johnson e o efeito da inocula\ue7\ue3o com Pisolithus microcarpus UFSC-Pt116 em solo contaminado com Zn. O delineamento experimental foi inteiramente casualizado em arranjo fatorial (2 x 6), sendo com e sem in\uf3culo e seis doses de Zn (0, 300, 600, 900, 1200 e 1500 mg kg-1 de solo), com seis repeti\ue7\uf5es. As mudas foram inoculadas e cultivadas durante 90 dias em viveiro. Ap\uf3s 67 dias do transplante definitivo foi avaliado o percentual de coloniza\ue7\ue3o ectomicorr\uedzica, a altura de planta, di\ue2metro do colo, n\ufamero de folhas, \uedndice de clorofila total, volume radicular, massa seca das folhas, da haste caulinar, radicular e total, rela\ue7\ue3o massa seca a\ue9rea/massa seca radicular e a rela\ue7\ue3o altura/di\ue2metro do colo. O percentual de coloniza\ue7\ue3o ectomicorr\uedzica em Corymbia citriodora \ue9 estimulado pelo acr\ue9scimo de at\ue9 1412,21 mg kg-1 de Zn no solo. O Corymbia citriodora \ue9 tolerante a adi\ue7\ue3o de at\ue9 1500 mg kg-1 de zinco em solo com 81% de argila, mesmo sem a inocula\ue7\ue3o com Pisolithus microcarpus. A an\ue1lise de correla\ue7\ue3o can\uf4nica evidencia que a inocula\ue7\ue3o com P. microcarpus favorece a massa seca total, radicular e da parte a\ue9rea de Corymbia citriodora cultivado em solo com 81% de argila contaminada com 600 mg kg-1 de Zn.The use of microorganisms potential association with plants is a common practice in soil contaminated by heavy metals, considered low-cost and environmentally friendly. This study aimed to evaluate the growth of Corymbia citriodora (Hook.) K. D. Hill & L.A.S. Johnson and the effect of Pisolithus microcarpus UFSC-Pt116 inoculation in soil contaminated with Zn. The design was completely randomized in a factorial arrangement (2 x 6), with and without inoculum and six doses of Zn (0, 300, 600, 900, 1200 and 1500 mg kg-1 soil), with six replications. Seedlings were inoculated and cultured for 90 days in nursery. After 67 days of transplantation was evaluated the ectomycorrhizal colonization percentage, plant height, stem diameter, number of leaves, chlorophyll index, root volume, leaf dry weight, stem, root and total, dry mass ratio / root dry mass and height / stem diameter. The ectomycorrhizal colonization percentage in Corymbia citriodora is stimulated by adding up to 1412.21 mg kg-1 Zn. The Corymbia citriodora is tolerant to the addition of up to 1500 mg kg-1 of zinc in soil with 81% clay even without inoculation with Pisolithus microcarpus.The canonical correlation analysis shows that inoculation with P. microcarpus favors total dry mass, root and aerial part of Corymbia citriodora grown in soil with 81% clay contaminated with 600 mg kg-1 Zn

    Effect of copper on soil bacteria and fungus population, on mycorrhizal association and on production of Eucalyptus grandis W. Hill ex Maiden, Pinus elliottii Engelm and Peltophorum dubium (Sprengel) Taubert seedlings

    Get PDF
    O cobre \ue9 um metal pesado que pode exercer efeitos t\uf3xicos para micro-organismos e plantas. Os fungos ectomicorr\uedzicos s\ue3o capazes de proteger a planta hospedeira da toxidez dos metais pesados, mas a presen\ue7a de certas concentra\ue7\uf5es de metais pode inibir o crescimento destes, prejudicando a simbiose micorr\uedzica e alterar o desenvolvimento das plantas. O objetivo deste trabalho foi avaliar o efeito de doses de cobre na popula\ue7\ue3o de bact\ue9rias e fungos do solo, bem como seus efeitos na associa\ue7\ue3o ectomicorr\uedzica e no desenvolvimento de mudas de eucalipto, pinus e canaf\uedstula. O levantamento da popula\ue7\ue3o de micro-organismos do solo foi realizado em casa de vegeta\ue7\ue3o durante 60 dias e os tratamentos foram doses de sulfato de cobre aplicadas ao solo (0,7; 0,708; 0,716; 0,724 mg kg-1 de solo) e mudas de eucalipto e pinus. No segundo experimento, mudas de eucalipto e canaf\uedstula inoculadas e n\ue3o inoculadas com Pisolithus microcarpus (Cooke & Massee) Cunn (UFSC Pt 116) receberam doses de cobre de 0, 100, 200 e 300 mg kg-1 de solo. Aos 110 dias, avaliaram-se a massa fresca da parte a\ue9rea e radicular, massa seca da parte a\ue9rea, altura, di\ue2metro do colo e porcentagem de coloniza\ue7\ue3o ectomicorr\uedzica. No primeiro experimento, a popula\ue7\ue3o total de bact\ue9rias e fungos do solo foi alterada pela presen\ue7a do cobre, por\ue9m as mudas de eucalipto e pinus n\ue3o mostraram efeitos da adi\ue7\ue3o do cobre. No segundo experimento, a inocula\ue7\ue3o das mudas de eucalipto e canaf\uedstula com o isolado UFSC Pt 116 favoreceu o desenvolvimento da massa fresca da parte a\ue9rea e radicular e a altura das plantas. Conforme os resultados obtidos, a canaf\uedstula foi capaz de realizar associa\ue7\ue3o ectomicorr\uedzica com o isolado testado. O desenvolvimento das pl\ue2ntulas de eucalipto e canaf\uedstula foi inibido pelos n\uedveis de cobre, mesmo inoculadas com o isolado UFSC Pt 116.Copper is a heavy metal that can have toxic effects on microorganisms and plants. Ectomycorrhizal fungi are able to protect the plant from heavy metal toxicity, but the presence of certain metal concentrations can inhibit the growth of this fungus, damage the mycorrhizal symbiosis and also altering the development of the plants. The aim of this study was to evaluate the effect of copper on soil bacteria and fungus population, as well as the effects on the ectomycorrhizal association in the development of Eucalyptus grandis , Pinus elliottii and Peltophorum dubium seedlings. The survey of the soil microorganism population was carried out in a greenhouse during 60 days and the treatments consisted of applications of copper sulphate (0.7; 0.708; 0.716; 0.724 mg Kg-1) to the soil and to eucalyptus and pinus seedlings. Eucalyptus and Peltophorum dubium seedlings inoculated and not inoculated with Pisolithus microcarpus (Cooke and Massee) Cunn (UFSC Pt 116) received copper levels of 0, 100, 200 and 300 mg kg-1. The height, stem diameter, shoot and root fresh biomass, shoot and root dry biomass and ectomycorrhizal colonization were evaluated at 110 days. Soil bacteria and fungus population were altered by the presence of copper and the eucalyptus and pinus seedlings were not affected by copper addition. The inoculation of the eucalyptus and canaf\uedstula seedlings with isolate UFSC Pt 116 favored the height of the plants and the development of shoot and root fresh biomass. According to the results, canaf\uedstula was able to form an ectomycorrhizal association with the isolate tested. The eucalyptus and canaf\uedstula seedling development was inhibited by copper following inoculation with the UFSC Pt 116 isolate

    Mycorrhizal association studies in six native forestry species of Rio Grande do Sul state

    Get PDF
    Ao favorecer o crescimento das plantas hospedeiras, a micorriza pode ser um fator importante para as ess\ueancias florestais nativas do estado do Rio Grande do Sul. O objetivo deste trabalho foi identificar o tipo de micorriza em seis esp\ue9cies florestais do Estado: pinheiro-do-paran\ue1 (Araucaria angustifolia (Bertol.) Kuntze), timba\ufava ( Enterolobium contortisiliquum (Vell.) Morong), canaf\uedstula ( Peltophorum dubium (Spreng) Taub), ip\uea-amarelo ( Tabebuia chrysotricha (Mart. ex DC.) Standl.), ip\uea-roxo ( Tabebuia heptaphylla (Well.) Toledo) e gr\ue1pia ( Apuleia leiocarpa (Vogel) J.F. Macbr). O estudo foi desenvolvido na Fepagro Floresta \u2013 Boca do Monte, Santa Maria, em bosques de esp\ue9cies nativas e plantadas. As amostras de ra\uedzes, os corpos de frutifica\ue7\ue3o dos fungos e o solo foram analisados no laborat\uf3rio. As ra\uedzes foram processadas e analisadas quanto ao tipo de micorriza presente. Os fungos ectomicorr\uedzicos nativos encontrados foram identificados, isolados e mantidos em cultura. As esp\ue9cies estudadas n\ue3o apresentaram coloniza\ue7\ue3o ectomicorr\uedzica, embora em alguns locais tenham sido encontrados esporocarpos pr\uf3ximos \ue0s plantas. A associa\ue7\ue3o com micorrizas arbusculares foi encontrada em todas as esp\ue9cies de ess\ueancias florestais nativas estudadas.Mycorrhizal associations could promote plant growth in native forestry species in Rio Grande do Sul State. The aim of this work was to identify mycorrhizal associations in six native forestry species: Araucaria angustifolia (Bertol.) Kuntze, Enterolobium contortisiliquum (Vell.) Morong, Peltophorum dubium (Spreng) Taub., Tabebuia chrysotricha (Mart. ex DC.) Standl., Tabebuia heptaphylla (Well.) Toledo) and Apuleia leiocarpa (Vogel) J.F. Macbr.). The study was done at Fepagro Forestry \u2013 Boca do Monte, Santa Maria, in cultivated and natural forest stands. Roots, fungal fruiting bodies and soil were analyzed in laboratory. Roots were processed and analyzed considering the formation of mycorrhizal association. Ectomycorrhizal fungi growing in the forest areas were identified, isolated and multiplied. The plants showed no ectomycorrhizal colonization, even though sporocarps of these fungi had been found close to the plants in some sites. The presence of arbuscular mycorrhizal was observed in all native forestry species studied

    ALTERNATIVE METHOD TO STUDY SOIL EDAPHIC FAUNA

    Get PDF
    Os levantamentos realizados sobre popula\ue7\uf5es da fauna ed\ue1fica podem n\ue3o mostrar diferen\ue7as de abund\ue2ncia de organismos por esbarrarem na dificuldade de instala\ue7\ue3o das armadilhas de coleta, rotineiramente utilizadas. Contudo, para uma maior praticidade de implanta\ue7\ue3o e de determina\ue7\ue3o do n\uedvel populacional de organismos ed\ue1ficos, foi avaliada uma metodologia alternativa \ue0 armadilha de Tretzel (modificada), o m\ue9todo Provid, para a coleta da fauna ed\ue1fica, proposto pelos autores deste trabalho. Os dois m\ue9todos foram instalados em nove diferentes \ue1reas, com tr\ueas repeti\ue7\uf5es por m\ue9todo. As \ue1reas diferiram quanto \ue0 localiza\ue7\ue3o, tipo de solo e cobertura vegetal. Os par\ue2metros avaliados para a popula\ue7\ue3o da fauna ed\ue1fica foram riqueza: abund\ue2ncia e \uedndice de diversidade de Simpson. Diferen\ue7as estat\uedsticas significativas n\ue3o foram encontradas para os dois m\ue9todos de coleta de organismos ed\ue1ficos entre as nove \ue1reas analisadas para os par\ue2metros avaliados. Portanto, pode-se concluir que a metodologia de coleta da fauna ed\ue1fica pelo m\ue9todo Provid pode ser utilizada de uma forma t\ue3o eficiente quanto \ue0 armadilha de Tretzel modificada. O m\ue9todo Provid \ue9 pr\ue1tico e f\ue1cil de usar.Study of soil organisms population may not detect differences of organisms number due to the difficulty of pitfall installation methods routinely used. However, to a better practice and determination of population level of soil organisms, it was evaluated an alternative methodology to the pitfall Tretzel (modified). The method is called Provid, for the collection of the soil organisms, proposed by the authors of this work. The two methods were installed in nine different areas, with three replication for each method. The areas differed in terms of location, soil type and vegetable covering. The appraised parameters were richeness, abundance and Simpson\ub4s index. As results, it was not found significant statistical differences for the two methods of collection of organism\ub4s edaphios among the nine analyzed areas, for the appraised parameters. Therefore, that the methodology of collection of the soil organisms for the Provid method can be used as efficient as the pitfall Tretzel modified method. The Provid method is practical and easy to be managed

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

    Get PDF
    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

    ECTOMYCORRHIZAL ISOLATES IN THE SEEDLING PRODUCTION OF Eucalyptus grandis W. Hill ex. Maiden IN QUARTZARENIC NEOSOLS

    Get PDF
    No estado do Rio Grande do Sul, os reflorestamentos de eucalipto encontram-se, geralmente, em solos de baixa fertilidade natural, favorecendo a associa\ue7\ue3o ectomicorr\uedzica. Neste trabalho, avaliou-se o efeito da inocula\ue7\ue3o dos isolados de fungos ectomicorr\uedzicos UFSC-Pt116, UFSC-Pt188 e UFSC-SA9, sobre plantas de Eucalyptus grandis, em Neossolo Quartzar\ueanico. As avalia\ue7\uf5es foram realizadas aos 30, 45, 60, 75 e 90 dias ap\uf3s semeadura. Plantas inoculadas com os isolados UFSC-Pt116, UFSC-Pt188 e UFSC-SA9 alcan\ue7aram maior altura, di\ue2metro do caule, massa seca da parte a\ue9rea e volume de ra\uedzes em rela\ue7\ue3o ao controle. Plantas inoculadas com o isolado de fungo ectomicorr\uedzico UFSC-Pt188 apresentaram maior teor de f\uf3sforo e pot\ue1ssio na parte a\ue9rea que as plantas n\ue3o inoculadas. A inocula\ue7\ue3o com o isolado f\ufangico ectomicorr\uedzico UFSC-Pt116 promoveu maior altura e massa seca da parte a\ue9rea. Para os teores de nitrog\ueanio e pot\ue1ssio, e para massa seca de ra\uedzes n\ue3o foram observadas diferen\ue7as significativas entre os tratamentos. A inocula\ue7\ue3o com os fungos ectomicorr\uedzicos UFSC-Pt116, UFSC-SA9 e UFSC-Pt188 isoladamente, promoveram maior altura, di\ue2metro de caule, ac\ufamulo de massa seca da parte a\ue9rea e volume de ra\uedzes das plantas de Eucalyptus grandis.In Rio Grande do Sul state, the eucalyptus planted forests are cultivated in low fertility soils, which contribute to ectomycorrhizal association. This study evaluated the effect of ectomycorrhizal isolates UFSC-Pt116, UFSC-Pt188 and UFSC-SA9 inoculation, individually and in combination, with Eucalyptus grandis in Quartzarenic Neosols. Evaluations were performed at 30, 45, 60, 75 and 90 days after sowing. Plants inoculated with isolates UFSC-Pt116, UFSC-Pt188 and UFSC-SA9 showed highest height, stem diameter, dry mass of shoot and root volume than the control. Plants inoculated with the ectomycorrhizal fungus isolate UFSC-Pt188 showed highest content of phosphorus and potassium in shoots than non-inoculated plants. Inoculation individual ectomycorrhizal isolate UFSC-Pt116 promoted the highest height and shoot dry mass. For nitrogen and potassium, and root biomass have not showed significant differences between treatments. Then inoculation with ectomycorrhizal UFSC-Pt116, UFSC-Pt188 and UFSC-SA9 alone promoted highest height, stem diameter, dry mass of shoot and plant root volume of Eucalyptus grandis

    Substract and phosphour influence in seedling production of Acacia mearnsii De Wild level

    Get PDF
    A inocula\ue7\ue3o de fungos micorr\uedzicos arbusculares (FMAs) \ue9 vi\ue1vel em mudas de esp\ue9cies florestais. O objetivo deste trabalho foi avaliar o estabelecimento de duas esp\ue9cies de FMAs na produ\ue7\ue3o de mudas de Acacia mearnsii em diferentes substratos e doses de f\uf3sforo. O experimento constou de cinco tratamentos, sendo dois tratamentos de inocula\ue7\ue3o de esp\ue9cies de FMAs, ( Glomus clarum Nicolson & Schenck e Glomus etunicatum Becker & Gerdemann) e tr\ueas tratamentos com diferentes substratos (mecplani, turfa f\ue9rtil e Neossolo Quartzar\ueanico); com cinco doses de f\uf3sforo (0, 50, 100, 500 e 1000 mg.kg-1), e dez repeti\ue7\uf5es. Alto n\uedvel de P no substrato n\ue3o impediu coloniza\ue7\ue3o micorr\uedzica das ra\uedzes. Os isolados G. clarum e G. etunicatum apresentaram alta efici\ueancia na coloniza\ue7\ue3o das ra\uedzes da A. mearnsii, e os substratos mecplani e turfa-f\ue9rtil foram os mais eficientes na produ\ue7\ue3o das mudas.The inoculation of mycorrhizal arbuscular fungi (FMAs) is viable in forest species. The aim of this study was to evaluate the establishment of two species of FMAs, in Ac\ue1cia mearnsii production, considering different substracts and phosphour levels. The experiment was carried out with five treatments, with two species of FMAs ( Glomus clarum Nicolson & Schenck and Glomus etunicatum Becker & Gerdemann), and three kinds of substracts (Mecplani, Fertil Turfa and Neossolo Quartzar\ueanico) with four phosphour levels, with 10 repetitions. The high level of P in the substract did not influence the mycorrhizal colonization in the roots. These mycorrhizal fungi showed high efficiency in roots colonization of A. mearnsii. The Mecplani and Fertil Turfa substracts were the most efficient ones in seedling growing
    corecore