16 research outputs found
NATIVE COLLEMBOLA REPRODUCTION IN LABORATORY CONDITIONS
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.)
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
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
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
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
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
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
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
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
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