Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/241798
Type: Artigo
Title: Influência da saturação por bases na qualidade e crescimento de mudas de cedro-australiano (Toona ciliata M. Roem var. australis)
Title Alternative: Influence of base saturation in quality and growth of australian cedar seedlings (Toona ciliata M. Roem var. australis)
Author: Braga, Marilena de Melo
Furtini Neto, Antonio Eduardo
Oliveira, Anna Hoffmann
Abstract: The Australian cedar (Toona ciliata M. Roem var. australis) is a promising species for commercial plantations based on the quality and wide use of its wood and high financial returns in short time. However, there is little information about the behavior of this species in relation to soil acidity. In this sense, the objective of this study was to evaluate the influence of different base saturation levels on growth and quality of Australian cedar seedlings. The substrate saturation was raised to 21.3; 33.2; 47.9; 60.4 and 70.0%, by adding different doses of limestone content of 12% MgO and 50% CaO in vessels with capacity of 3.5 dm(3) of a typical dystrophic Red Latosol (Oxisol). At 120 days after transplanting were obtained height, stem diameter, root dry matter, aerial parts and total. It was also determined the relationship height/stem diameter, height/aerial parts dry matter, aerial parts dry matter/root dry matter and Dickson's quality index. Australian cedar seedlings respond positively to the base saturation increase. The positive responses of morphological variables pointed to need to do the acidity correction increasing the level of saturation to 50 %, in order to maximize the crop yield.
O cedro-australiano (Toona ciliata M. Roem var. australis) é uma espécie promissora para plantios comerciais em função da qualidade e ampla utilização da sua madeira e de seu alto retorno financeiro em um pequeno espaço de tempo. No entanto, são escassas as informações sobre o comportamento desta espécie em relação à acidez do solo. Nesse sentido, objetivou-se avaliar a influência de diferentes níveis de saturação por bases sobre o crescimento e a qualidade de mudas de cedro-australiano. A saturação por bases do substrato foi elevada para 21,3; 33,2; 47,9; 60,4 e 70,0%, através da adição de diferentes doses de calcário com teor de 12% MgO e 50% CaO (PRNT 95%) em vasos com capacidade para 3,5 dm3 que continham Latossolo Vermelho Distroférrico típico. Aos 120 dias após o transplantio foram obtidos: altura, diâmetro do coleto, matéria seca das raízes, parte aérea e total. Determinou-se, também, as relações altura/diâmetro do coleto, altura/matéria seca da parte aérea, matéria seca da parte aérea/matéria seca de raiz e o índice de qualidade de Dickson. As mudas de cedro-australiano respondem positivamente à elevação da saturação por bases. As respostas positivas das variáveis morfológicas analisadas apontam para a necessidade de se fazer a correção da acidez do solo elevando o nível de saturação por bases para 50%, no intuito de maximizar a produtividade da cultura
metadata.dc.description.abstractalternative: The Australian cedar (Toona ciliata M. Roem var. australis) is a promising species for commercial plantations based on the quality and wide use of its wood and high financial returns in short time. However, there is little information about the behavior of this species in relation to soil acidity. In this sense, the objective of this study was to evaluate the influence of different base saturation levels on growth and quality of Australian cedar seedlings. The substrate saturation was raised to 21.3; 33.2; 47.9; 60.4 and 70.0%, by adding different doses of limestone content of 12% MgO and 50% CaO in vessels with capacity of 3.5 dm3 of a typical dystrophic Red Latosol (Oxisol). At 120 days after transplanting were obtained height, stem diameter, root dry matter, aerial parts and total. It was also determined the relationship height/stem diameter, height/aerial parts dry matter, aerial parts dry matter/root dry matter and Dickson's quality index. Australian cedar seedlings respond positively to the base saturation increase. The positive responses of morphological variables pointed to need to do the acidity correction increasing the level of saturation to 50 %, in order to maximize the crop yield
Subject: Mudas - Qualidade
Country: Brasil
Editor: UFSM/Centro Pesquisas Florestais
Citation: Influence Of Base Saturation In Quality And Growth Of Australian Cedar Seedlings (toona Ciliata M. Roem Var. Australis). Centro Pesquisas Florestais, Ufsm, v. 25, p. 49-58 JAN-MAR-2015.
Rights: aberto
Identifier DOI: 10.1590/1980-509820152505049
Address: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-50982015000100049
Date Issue: 2015
Appears in Collections:IG - Artigos e Outros Documentos

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