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Previous issue date: 2010-03-04 / Funda??o Carlos Chagas Filho de Amparo ? Pesquisa do Estado do RJ, FAPERJ, Brasil. / The present study aimed to evaluate some limiting factors to the growth of Toona ciliata M.
Roem. var. australis (Australian red cedar). In chapter I, it was evaluated the growth of Toona
ciliata seedlings inoculated with arbuscular mycorrhizae fungi (FMAs), Acaulospora laevis,
A. morrowiae, Entrophospora colombiana, E. contigua, Gigaspora margarita, Glomus
clarum, Scutellospora calospora, S. gilmorei, S. heterogama e S. pellucida. In chapter II, it
was evaluated the contents and accumulations of nutrients in Australian red cedar seedlings,
submitted the complete solution, diluted solution 1/2 and 1/4. In chapter III, it was verified the
symptoms of macronutrients deficiency, nutrients contents and accumulations in the
Australian red cedar plants submitted the complete solution with omission of N, P, K, Ca and
Mg. Chapter IV, it was observed the reply of the species the aluminum presence, using
treatments with complete solution diluted the 1/4 with addition of 0, 5 and 20 mg. L-1 de Al.
Between AMF tested, A. morrowiae, E. contigua e S. pellucida were most efficient in
promoting the accumulation of dry weight of aerial part, development of the area leaf and
phosphorous content on leaf in Toona ciliata seedlings, beyond presenting the biggest
densities of esporos.50 cm-3 of substrate. And the biggest incidence of mycorrhizae settling in
Toona ciliata seedlings was gotten with the species S. pellucida. The behavior of the species
in reply to the use of nutritional solutions complete and diluted 1/2 and 1/4, showed that the
biggest increment in height, diameter and dry weight had occurred in plants submitted at
diluted solution the 1/4. The macronutrients contents and accumulations in Australian red
cedar plants presented the following decreasing order: N > K > Ca > P > Mg. With regard to
nutritional deficiency it verified that the omission of K was the one that more affected the
development of the plant in height. The limitation in the increment stem diameter of the plants
occurred in all the treatments, with exception of the complete solution. The production of total
weight dry of the plants was affected in all the treatments with omission of nutrients, in
according the following decreasing order: Complete Solution > - P > - Mg > - N > - K > - Ca.
The initial growth of Toona ciliata seedlings was affected by the omission of all the
macronutrients, having been the similar symptoms with the symptoms of other species of the
same family. The immediate damages most intense and had been observed in the omission of
K and Ca. Thus, the Toona ciliata species demonstrated to be demanding in macronutrients in
the following decreasing order: K > N > Mg > Ca > P. The reply of the species the aluminum
presence demonstrated that the growth, nutrient content and accumulation in Australian red
cedar plants were stimulated in the presence of 5mg.L-1 of aluminum. The addition of 20
mg.L-1 de Al reduced the growth of the plants and macronutrients accumulation, in the
following decreasing order: Ca > Mg > N > P > K. The visual symptoms of fitotoxicity had
been typical to this element, beyound of the leaf with intense green coloration progressing for
the yellow; the leaves oldest had progressed for yellow-brown, the edges to the limb center;
and curving of new leaves. / O presente trabalho teve como objetivo avaliar alguns fatores limitantes ao crescimento de
Toona ciliata M. Roem. var. australis (cedro-australiano). No cap?tulo I, avaliou-se o
crescimento de mudas de cedro-australiano inoculadas com fungos micorr?zicos arbusculares
(FMAs), Acaulospora laevis, A. morrowiae, Entrophospora colombiana, E. contigua,
Gigaspora margarita, Glomus clarum, Scutellospora calospora, S. gilmorei, S. heterogama e
S. pellucida. No cap?tulo II, foram avaliados os teores e ac?mulos de nutrientes em mudas de
cedro-australiano, submetidas ? solu??o nutritiva de Hoagland & Arnon modificada,
completa, dilu?da a 1/2 e a 1/4 de for?a i?nica. No cap?tulo III, verificou-se os sintomas de
defici?ncia de macronutrientes, teores e ac?mulos de nutrientes nas plantas de cedroaustraliano
crescidas em solu??o nutritiva com omiss?o de N, P, K, Ca e Mg. No Cap?tulo IV,
observou-se a resposta da esp?cie estudada na presen?a de alum?nio, empregando tratamentos
com solu??o nutritiva dilu?da a 1/4 com adi??o de 5 e 20 mg.L-1 de Al, al?m de uma
testemunha Entre os fungos micorr?zicos arbusculares testados, A. morrowiae, E. contigua e
S. pellucida foram os mais eficientes em promover o ac?mulo de mat?ria seca da parte a?rea,
desenvolvimento da ?rea foliar e teor de f?sforo foliar em mudas de Toona ciliata, al?m de
apresentarem as maiores densidades de esporos por 50 cm3 de substrato. A maior coloniza??o
micorr?zica em mudas de Toona ciliata foi obtida com a esp?cie f?ngica S. pellucida. O
comportamento da esp?cie em resposta ao emprego de solu??es nutritivas completas, dilu?da a
1/2 e 1/4, mostrou que o maior incremento em altura, di?metro e mat?ria seca ocorreram em
plantas submetidas ? solu??o dilu?da a 1/4. Os teores e ac?mulos de macronutrientes em
plantas de cedro-australiano seguiram a seguinte ordem decrescente: N > K > Ca > P > Mg.
Com rela??o ? defici?ncia nutricional, verificou-se que a omiss?o de K foi a que mais afetou o
crescimento em altura. A limita??o no crescimento em di?metro do coleto das plantas ocorreu
em todos os tratamentos, com exce??o da solu??o de Hoagland & Arnon. A produ??o de
massa seca total das plantas foi afetada em todos os tratamentos com omiss?o de nutrientes,
obedecendo ? seguinte ordem decrescente: Completo> -P > -Mg > -N > -K > -Ca. O
crescimento inicial de mudas de Toona ciliata ? afetado pela omiss?o de todos os
macronutrientes, sendo os sintomas semelhantes com os sintomas de outras esp?cies da
mesma fam?lia. Os danos mais intensos e imediatos foram observados na omiss?o de K e Ca.
Assim, a esp?cie Toona ciliata demonstrou ser exigente em macronutrientes na seguinte
ordem decrescente: K > N > Mg > Ca > P. A resposta da esp?cie ? presen?a de alum?nio
demonstrou que o crescimento, teor e ac?mulo de nutrientes em plantas de cedro-australiano
foram estimulados na presen?a de 5mg.L-1 de alum?nio. A adi??o de 20 mg.L-1 de Al reduziu
o crescimento das plantas e o ac?mulo de macronutrientes, na seguinte ordem decrescente: Ca
> Mg > N > P > K. Os sintomas visuais de fitotoxidez associados ? dose de 20 mg.L-1 de Al
foram t?picos da toxidez a este elemento, al?m das folhas apresentarem colora??o verde
intensa progredindo para o amarelecimento; com a acentua??o dos sintomas, as folhas mais
velhas progrediram para amarelo-castanho, dos bordos para o centro do limbo e enrolamento
ou encurvamento de folhas novas.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:jspui/1795 |
| Date | 04 March 2010 |
| Creators | Foga?a, Cristiane Alves |
| Contributors | Leles, Paulo S?rgio dos Santos, Silva, Eliane Maria da, Zonta, Everaldo, Campello, Eduardo Francia Carneiro, Lima, Eduardo, Paiva, Haroldo Nogueira, Goi, Silvia Regina |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Programa de P?s-Gradua??o em Ci?ncias Ambientais e Florestais, UFRRJ, Brasil, Instituto de Florestas |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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