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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
18/01/2017 |
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Data da última atualização: |
18/01/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
RESENDE, R. T.; MARCATTI, G. E.; PINTO, D. S.; TAKAHASHI, E. K.; CRUZ, C. D.; RESENDE, M. D. V. de. |
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Afiliação: |
Rafael T. Resende, UFV; Gustavo E. Marcatti, UFV; Danielle S. Pinto, Universidade Federal Rural da Amazônia; Elizabete K. Takahashi, CENIBRA; Cosme Damião Cruz, UFV; MARCOS DEON VILELA DE RESENDE, CNPF. |
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Título: |
Intra-genotypic competition of Eucalyptus clones generated by environmental heterogeneity can optimize productivity in forest stands. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 380, p. 50-58, Nov. 2016. |
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DOI: |
http://dx.doi.org/10.1016/j.foreco.2016.08.041 |
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Idioma: |
Inglês |
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Conteúdo: |
The growth structure of Eucalyptus plantations is the result of site environment, genetic material, and different types of interaction between neighboring plants. It is well known that sites that are more homogeneous result in greater forest productivity. However, additional factors inherent in the microenvironment or the quality of cuttings can lead to heterogeneous clonal biomass at the end of the rotation cycle. This study of the growth patterns in commercial stands of Eucalyptus clones had two aims: (i) to determine whether environmental heterogeneity causes competition among genetically identical individuals and (ii) to validate the occurrence of intra-genotypic competition, revealing the potential relationship with forest productivity. The present study was developed based on two linear mixed models: a non-genetic model, which accounts for spatial autocorrelation and is used to estimate the effects of competition between neighboring trees into the single clone plots; and a genetic model to infer the nature of the clonal competition. Three hundred and six square plots containing one hundred plants from eight experiments using a randomized block design, with three replications, were evaluated. The experiments were positioned in different environmental conditions by combining two different plant spacings and two altitude elevations. Using the path analysis procedure, we verified that there were significant direct effects of competition according to the proximity of the trees in the plot. In addition, trees that were more distant caused indirect effects of competition through nearby trees. Stands with uniform growth conditions (measured by residual autocorrelation parameters) actually caused higher productivity. The results from the genetic correlations of intra-genotypic competition and productivity showed that the less competitive clones were always less productive, regardless of the experimental condition. The more competitively aggressive clones could optimize their productivity when planted in sites with high residual levels, reaching productivities similar to those of homogeneous stands. This suggests that the implementation of certain silviculture techniques, seeking to increase site uniformity, is less relevant to these clones. The selection and use of these clones might be useful for large companies, because they offer the opportunity to achieve high productivity, and for smaller producers who do not have access to the silvicultural quality used by large companies. MenosThe growth structure of Eucalyptus plantations is the result of site environment, genetic material, and different types of interaction between neighboring plants. It is well known that sites that are more homogeneous result in greater forest productivity. However, additional factors inherent in the microenvironment or the quality of cuttings can lead to heterogeneous clonal biomass at the end of the rotation cycle. This study of the growth patterns in commercial stands of Eucalyptus clones had two aims: (i) to determine whether environmental heterogeneity causes competition among genetically identical individuals and (ii) to validate the occurrence of intra-genotypic competition, revealing the potential relationship with forest productivity. The present study was developed based on two linear mixed models: a non-genetic model, which accounts for spatial autocorrelation and is used to estimate the effects of competition between neighboring trees into the single clone plots; and a genetic model to infer the nature of the clonal competition. Three hundred and six square plots containing one hundred plants from eight experiments using a randomized block design, with three replications, were evaluated. The experiments were positioned in different environmental conditions by combining two different plant spacings and two altitude elevations. Using the path analysis procedure, we verified that there were significant direct effects of competition according to the proximity of the tr... Mostrar Tudo |
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Palavras-Chave: |
Clonal competition; Competição clonal; Espécie exótica; Forest breeding; Mixed models; Modelos mixtos; Plant spacing; Stand productivity. |
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Thesagro: |
Espaçamento; Eucalipto; Produtividade. |
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Thesaurus Nal: |
Eucalyptus. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03561naa a2200337 a 4500
001 2061079
005 2017-01-18
008 2016 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.foreco.2016.08.041$2DOI
100 1 $aRESENDE, R. T.
245 $aIntra-genotypic competition of Eucalyptus clones generated by environmental heterogeneity can optimize productivity in forest stands.$h[electronic resource]
260 $c2016
520 $aThe growth structure of Eucalyptus plantations is the result of site environment, genetic material, and different types of interaction between neighboring plants. It is well known that sites that are more homogeneous result in greater forest productivity. However, additional factors inherent in the microenvironment or the quality of cuttings can lead to heterogeneous clonal biomass at the end of the rotation cycle. This study of the growth patterns in commercial stands of Eucalyptus clones had two aims: (i) to determine whether environmental heterogeneity causes competition among genetically identical individuals and (ii) to validate the occurrence of intra-genotypic competition, revealing the potential relationship with forest productivity. The present study was developed based on two linear mixed models: a non-genetic model, which accounts for spatial autocorrelation and is used to estimate the effects of competition between neighboring trees into the single clone plots; and a genetic model to infer the nature of the clonal competition. Three hundred and six square plots containing one hundred plants from eight experiments using a randomized block design, with three replications, were evaluated. The experiments were positioned in different environmental conditions by combining two different plant spacings and two altitude elevations. Using the path analysis procedure, we verified that there were significant direct effects of competition according to the proximity of the trees in the plot. In addition, trees that were more distant caused indirect effects of competition through nearby trees. Stands with uniform growth conditions (measured by residual autocorrelation parameters) actually caused higher productivity. The results from the genetic correlations of intra-genotypic competition and productivity showed that the less competitive clones were always less productive, regardless of the experimental condition. The more competitively aggressive clones could optimize their productivity when planted in sites with high residual levels, reaching productivities similar to those of homogeneous stands. This suggests that the implementation of certain silviculture techniques, seeking to increase site uniformity, is less relevant to these clones. The selection and use of these clones might be useful for large companies, because they offer the opportunity to achieve high productivity, and for smaller producers who do not have access to the silvicultural quality used by large companies.
650 $aEucalyptus
650 $aEspaçamento
650 $aEucalipto
650 $aProdutividade
653 $aClonal competition
653 $aCompetição clonal
653 $aEspécie exótica
653 $aForest breeding
653 $aMixed models
653 $aModelos mixtos
653 $aPlant spacing
653 $aStand productivity
700 1 $aMARCATTI, G. E.
700 1 $aPINTO, D. S.
700 1 $aTAKAHASHI, E. K.
700 1 $aCRUZ, C. D.
700 1 $aRESENDE, M. D. V. de
773 $tForest Ecology and Management$gv. 380, p. 50-58, Nov. 2016.
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