HEIGHT-DIAMETER MODELS FOR Eucalyptus sp. PLANTATIONS IN BRAZIL
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| Format: | Artículo científico |
| Langue: | en |
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Universidade Federal de Lavras
2018
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| _version_ | 1876449050586251264 |
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| author | Antonio Carlos Ferraz Filho |
| author_facet | Antonio Carlos Ferraz Filho |
| contents | HEIGHT-DIAMETER MODELS FOR Eucalyptus sp. PLANTATIONS IN BRAZIL Antonio Carlos Ferraz Filho Blas Mola-Yudego Andressa Ribeiro José Roberto Soares Scolforo Rodolfo Araújo Loos Henrique Ferraço Scolforo Agrociencias Forest inventory Mixed effect models Tree height prediction The use of height-diameter models have important applications in the management of eucalyptus plantations. The aim of this paper is to provide adequate height models based on the diameter and stand variables that could be easily used and applied to plantation’s management. The data was based on tests located in Espírito Santo and Bahia. A total of 312 plots, including 35 different treatments (different initial planting densities, number and severity of thinning operations, fertilization regimes, among others), and four different clones. This resulted in 2,407 conditions for 85,608 tree measurements. The constructed equations were based on mixed-effect models, in order to accommodate possible autocorrelations, to address variations between sites and to obtain locally calibrated estimates. Among the different model structures and combination of variables tested and presented, the best model showed a coefficient of determination of 0.953 and 0.988, for the fixed and fixed+random parts, respectively. The model included a random factor for measurements-within-tree and tree-within-plot. The bias of the fixed part was 0.208 cm (0.0659%). We believe the models in this study can have broad applications in management and inventory methods applied to plantations. 2018 artículo científico 0104-7760 https://www.redalyc.org/articulo.oa?id=74460165002 https://www.redalyc.org/journal/744/74460165002/ https://www.redalyc.org/journal/744/74460165002/html/ https://www.redalyc.org/journal/744/74460165002/74460165002.epub https://www.redalyc.org/journal/744/74460165002/movil 10.1590/01047760201824012466 en http://www.redalyc.org/revista.oa?id=744 CERNE application/pdf Universidade Federal de Lavras CERNE (Brasil) Num.1 Vol.24 |
| format | Artículo científico |
| id | redalyc_74460165002 |
| institution | Redalyc |
| language | en |
| publishDate | 2018 |
| publisher | Universidade Federal de Lavras |
| spellingShingle | HEIGHT-DIAMETER MODELS FOR Eucalyptus sp. PLANTATIONS IN BRAZIL Antonio Carlos Ferraz Filho Agrociencias Forest inventory Mixed effect models Tree height prediction HEIGHT-DIAMETER MODELS FOR Eucalyptus sp. PLANTATIONS IN BRAZIL Antonio Carlos Ferraz Filho Blas Mola-Yudego Andressa Ribeiro José Roberto Soares Scolforo Rodolfo Araújo Loos Henrique Ferraço Scolforo Agrociencias Forest inventory Mixed effect models Tree height prediction The use of height-diameter models have important applications in the management of eucalyptus plantations. The aim of this paper is to provide adequate height models based on the diameter and stand variables that could be easily used and applied to plantation’s management. The data was based on tests located in Espírito Santo and Bahia. A total of 312 plots, including 35 different treatments (different initial planting densities, number and severity of thinning operations, fertilization regimes, among others), and four different clones. This resulted in 2,407 conditions for 85,608 tree measurements. The constructed equations were based on mixed-effect models, in order to accommodate possible autocorrelations, to address variations between sites and to obtain locally calibrated estimates. Among the different model structures and combination of variables tested and presented, the best model showed a coefficient of determination of 0.953 and 0.988, for the fixed and fixed+random parts, respectively. The model included a random factor for measurements-within-tree and tree-within-plot. The bias of the fixed part was 0.208 cm (0.0659%). We believe the models in this study can have broad applications in management and inventory methods applied to plantations. 2018 artículo científico 0104-7760 https://www.redalyc.org/articulo.oa?id=74460165002 https://www.redalyc.org/journal/744/74460165002/ https://www.redalyc.org/journal/744/74460165002/html/ https://www.redalyc.org/journal/744/74460165002/74460165002.epub https://www.redalyc.org/journal/744/74460165002/movil 10.1590/01047760201824012466 en http://www.redalyc.org/revista.oa?id=744 CERNE application/pdf Universidade Federal de Lavras CERNE (Brasil) Num.1 Vol.24 |
| title | HEIGHT-DIAMETER MODELS FOR Eucalyptus sp. PLANTATIONS IN BRAZIL |
| topic | Agrociencias Forest inventory Mixed effect models Tree height prediction |
| url | https://www.redalyc.org/articulo.oa?id=74460165002 https://www.redalyc.org/journal/744/74460165002/ https://www.redalyc.org/journal/744/74460165002/html/ https://www.redalyc.org/journal/744/74460165002/74460165002.epub https://www.redalyc.org/journal/744/74460165002/movil |