TENDÊNCIAS DE CRESCIMENTO EM ALTURA DOMINANTE DE DOIS CLONES DE &lt;i&gt;Eucalyptus saligna&lt;/i&gt; Smith IMPLANTADOS EM DISTINTAS CONDIÇÕES DE SOLO

Pissinin, Lucas Zancan; Schneider, Paulo Renato

doi:10.5902/1980509826465

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…The superiority of the algebraic difference method was confirmed from the graphic analysis of the normalized residuals, which presented a more homogeneous distribution compared to the guide curve method (Figure 2). A similar characteristic was found by Pissinin and Schneider (2017) when they adjusted different models in the guide curve and algebraic difference methods in eucalyptus stands, in which the algebraic difference method presented a homogeneous distribution of residuals and smaller errors.…”

Section: Discussionsupporting

confidence: 78%

“…The superiority of the algebraic difference method in the construction of site index curves was also observed by Castro et al (2015), in a eucalyptus stand in Minas Gerais, with the standard error values of the estimate close to 6%. Pissinin and Schneider (2017) observed that the algebraic difference method presented the smallest estimation errors compared to the guide curve, using the Chapman and Richards model. Kitikidou et al (2011), applying the algebraic difference method to construct site index curves in a Pinus brutia stand, observed that the Bailey and Clutter model was superior to Chapman and Richards, corroborating the results obtained in this study.…”

Section: Discussionmentioning

confidence: 94%

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Site Index in Eucalyptus Stands Applying Ordinary Kriging: An Approach With Different Models and Methods of Classification

Rocha

Araújo

Morais

et al. 2021

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The objective of this work was to evaluate the efficiency of models and methods to obtain the site index, associated with ordinary kriging, to classify productive capacity in eucalyptus stands. Thus, the site quality was performed considering the traditional modeling in clonal stands (2,119 hectares) located in Minas Gerais state, Brazil. 170 plots of 400m2 were randomly allocated, representing a sampling intensity of 0.32%. The dominant height of trees (Assmann) was measured at 24, 36, 48, 60, 72, and 84 months. The site index (S) was estimated by the guide curve and algebraic difference methods, using the models of Schumacher, Chapman and Richards, and Bailey and Clutter. 136 plots were used in the fit and 34 plots in the predictive validation. The spatial dependence of site index was evaluated by experimental semivariogram and adjustment of exponential, spherical, and gaussian models. After confirming the spatial dependence, ordinary kriging was performed to spatialize the site index. For the predictive validation, the dominant height values at 72 months were used. The algebraic difference method provided excellent estimates of site index, which showed spatial dependence in all adjustments, from moderate to strong. In most cases, the gaussian model was the most accurate. It is concluded that the algebraic difference method was more efficient and the site index showed strong spatial dependence at all ages, regardless of the model used. Thus, regression models for site index estimation can be used in combination with ordinary kriging techniques.

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Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 94%

Site Index in Eucalyptus Stands Applying Ordinary Kriging: An Approach With Different Models and Methods of Classification

Rocha

Araújo

Morais

et al. 2021

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“…According to Pelissari et al (2013), who worked with seminal stands in the same area, the plots adjacent to the experimental area were classified by the dominant height at all sites of medium to low productivity. Thus, the height trait was likely the most affected, due to the fact that the dominant height was the main indicator of site quality (Pissinin and Schneider 2017).…”

Section: Discussionmentioning

confidence: 99%

Genetic parameters in a clonal test of Tectona grandis in Mato Grosso, Brazil

Pereira¹,

Caldeira

Arriel

2021

ADV. FOR. SCI.

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Teak (Tectona grandis) is a high-value timber species in tropical regions. In Brazil, although teak has a high productivity, there are few studies related to its genetic improvement. This work aimed to estimate genetic parameters and evaluate potential gains of selection in a clonal test of teak installed in the state of Mato Grosso, Brazil. The experimente is in a randomized block design, with five replications, 3x3 m spacing, 22 treatments, and plots with six individuals. At five years, the genotypes were evaluated for survival (S), tree total height (H) and girth at breast height (GBH). There was significance and feasibility of selection for S and GBH. For H, the result was not significant, indicating few gains with the selection. The genetic parameters of clonal mean heritabilities and accuracy were of moderate magnitude for S and GBH and low for H. To best of our knowledge, this is the first work that estimates genetic parameters in a clonal teak test in the field in Brazil.

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“…Verificam-se restrições hídricas e má distribuição das chuvas na região do plantio. Geralmente ocorre um período de estiagem variando de quatro a sete meses, e o maior volume de chuvas concentram-se entre os meses de outubro a abril, o que pode afetar o crescimento, uma vez que o mogno africano é considerado uma espécie que depende diretamente de fatores como radiação solar, água e nutrientes (PINHEIRO et al, 2011).…”

Section: Metodologiaunclassified

Índice de local para Khaya Spp. usando o diâmetro dominante

De Oliveira,

Cabacinha,

Araújo Júnior

et al. 2023

OLEL

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A capacidade produtiva de um local está intimamente relacionada ao crescimento e a produção de um povoamento, e é um dos principais pilares para o manejo florestal. O objetivo deste estudo foi classificar a capacidade produtiva de povoamentos de Khaya spp. no norte de Minas Gerais, utilizando o diâmetro dominante como parâmetro. Para isso, empregou-se o método da curva guia, ajustando modelos não lineares que relacionam o diâmetro dominante e a idade, como os modelos de Schumacher, Logístico de 3 parâmetros, Prodan, Chapman-Richards, Monomolecular e Bates-Watts. As curvas de índice de sítio foram geradas com uma idade de referência de 240 meses. Na avaliação da qualidade dos ajustes dos modelos, foram consideradas estatísticas como o erro padrão residual, o critério de informação Akaike, a correlação entre valores observados e estimados, e a dispersão residual. Os resultados indicaram que todos os modelos se adequaram devidamente à base de dados, destacando-se o modelo Logístico por sua eficiência em gerar resultados com maior realismo biológico, sendo recomendado para a classificação de sítios e a previsão do diâmetro dominante em povoamentos de mogno africano.

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TENDÊNCIAS DE CRESCIMENTO EM ALTURA DOMINANTE DE DOIS CLONES DE <i>Eucalyptus saligna</i> Smith IMPLANTADOS EM DISTINTAS CONDIÇÕES DE SOLO

Cited by 3 publications

References 2 publications

Site Index in Eucalyptus Stands Applying Ordinary Kriging: An Approach With Different Models and Methods of Classification

Site Index in Eucalyptus Stands Applying Ordinary Kriging: An Approach With Different Models and Methods of Classification

Genetic parameters in a clonal test of Tectona grandis in Mato Grosso, Brazil

Índice de local para Khaya Spp. usando o diâmetro dominante

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