Effect of aspect, tree age and tree diameter on bark thickness of<i>Picea orientalis</i>

Sönmez, Turan; Keleş, Sedat; Tilki, Fahrettin

doi:10.1080/02827580701314716

Cited by 44 publications

(33 citation statements)

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“…Although no data on the amount of bark of the trees studied is available, it is known, for example that Pinus sylvestris has values from 5 to 18 % (Standke & Schneider, 1981). Other reports for different tree species indicate that the bark volume varies from 10 to 20 % (Grassia, 2009;Lassasenaho, Melkas, & Alden, 2005;Malone & Liang, 2009;Sonmez, Keles, & Tilki, 2007). These data suggests that the amount of bark generated by a tree may be a residue that is susceptible of energy use.…”

Section: Determinación Del Poder Caloríficomentioning

confidence: 73%

“…Aunque no se dispone de datos sobre la cantidad de corteza de los árboles estudiados, es conocido, por ejemplo, que Pinus sylvestris tiene valores de 5 a 18 % (Standke & Schneider, 1981). Otros reportes para diferentes especies de árboles indican que el volumen de corteza varía de 10 a 20 % (Grassia, 2009;Lassasenaho, Melkas, & Alden, 2005;Malone & Liang, 2009;Sonmez, Keles, & Tilki, 2007). Estos datos sugieren que la cantidad de corteza que genera un árbol, pudiera ser un residuo susceptible de aprovechamiento energético.…”

Section: Introductionunclassified

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Poder Calorífico Y Material Inorgánico en La Corteza De Seis Árboles Frutales

Martínez-Pérez¹,

Pedraza-Bucio²,

Apolinar-Cortes³

et al. 2012

Rev Cha Se Cie For y del Amb

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El poder calorífico y el contenido de sustancias minerales (cenizas) se determinaron en la corteza de seis especies arbóreas frutales (Annona cherimola Mill., Citrus aurantifolia Swingle, Malus domestica Borkh., Psidium guajava L., Prunus dulcis [Mill.] D. A. Webb y Tamarindus indica L.). Las cenizas obtenidas fueron analizadas mediante rayos X. Los valores encontrados de poder calorífico variaron de 3,453.49 kcal·kg-1 en T. indica a 4,076.10 kcal·kg-1 en P. guajava. En el caso de las cenizas, los resultados fluctuaron de 5.76 % en P. guajava a 21.93 % en T. indica. Se observó que un contenido mayor de minerales en las cortezas tiende a disminuir su poder calorífico. Los elementos químicos comunes en las muestras analizadas fueron calcio, potasio, magnesio, fósforo y azufre. No se detec- taron metales pesados en las muestras de la corteza.

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Section: Determinación Del Poder Caloríficomentioning

confidence: 73%

Section: Introductionunclassified

Poder Calorífico Y Material Inorgánico en La Corteza De Seis Árboles Frutales

Martínez-Pérez¹,

Pedraza-Bucio²,

Apolinar-Cortes³

et al. 2012

Rev Cha Se Cie For y del Amb

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“…This categorization increases the accuracy of BTi estimation, being a variable of easy estimation during forest inventories. In Picea orientalis it was observed that bark thickness at DBH is not only correlated with tree age and diameter class but also with stand location in sunny or shadow hillsides (Sonmeza et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Bark volume depends on its thickness and stem diameter, being affected by tree age and stand conditions (environmental factors), where bark thickness increases (Laasasenaho et al, 2005;Sonmeza et al, 2007) as DBH increases (with the age of the individuals). Dimitrov (1976) found that the best models for bark volume estimation for Picea included DBH, total height, volume and site quality of the stands.…”

Section: Discussionmentioning

confidence: 99%

Equations of bark thickness and volume profiles at different heights with easy-measurement variables

Cellini

Galarza²,

Burns

et al. 2012

For. syst.

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The objective of this work was to develop equations of thickness profile and bark volume at different heights with easy-measurement variables, taking as a study case Nothofagus pumilio forests, growing in different site qualities and growth phases in Southern Patagonia. Data was collected from 717 harvested trees. Three models were fitted using multiple, non-lineal regression and generalized linear model, by stepwise methodology, iteratively reweighted least squares method for maximum likelihood estimation and Marquardt algorithm. The dependent variables were diameter at 1.30 m height (DBH), relative height (RH) and growth phase (GP). The statistic evaluation was made through the adjusted determinant coefficient (r 2 -adj), standard error of the estimation (SEE), mean absolute error and residual analysis. All models presented good fitness with a significant correlation with the growth phase. A decrease in the thickness was observed when the relative height increase. Moreover, a bark coefficient was made to calculate volume with and without bark of individual trees, where significant differences according to site quality of the stands and DBH class of the trees were observed. It can be concluded that the prediction of bark thickness and bark coefficient is possible using DBH, height, site quality and growth phase, common and easymeasurement variables used in forest inventories.Key words: multiple regression; non lineal regression; GLM; forest inventory; Nothofagus pumilio; Tierra del Fuego. Resumen Ecuaciones del grosor y volumen de corteza a diferentes alturas utilizando variables de fácil mediciónEl objetivo de este trabajo fue desarrollar ecuaciones de perfil del grosor y el volumen de corteza para diferentes alturas utilizando variables de fácil medición, tomando como caso de estudio los bosques de Nothofagus pumilio, creciendo en un gradiente de calidades de sitio y fases de crecimiento en Patagonia Sur. Se tomaron datos de 717 árboles. Se ajustaron tres modelos utilizando regresión múltiple, no lineal, y modelo lineal generalizado, mediante la metodología paso a paso, el algoritmo de Marquardt y de máxima verosimilitud. Las variables dependientes fueron el diámetro a 1,30 m de altura (DAP), altura relativa y la fase de crecimiento. Todos los modelos presentaron buen ajuste con una correlación significativa con la fase de crecimiento. Se observó una disminución en el espesor de corteza con el aumento de la altura relativa. Por otra parte, se desarrolló un coeficiente de corteza para calcular el volumen sin corteza de árboles, en donde se observaron diferencias significativas con la calidad de sitio y clases de DAP de los árboles. La predicción del espesor de la corteza y el coeficiente de la corteza es posible utilizando el DAP, altura, calidad de sitio y la fase de crecimiento, variables de fácil medición en inventarios forestales.Palabras clave: regresión múltiple; regresión no lineal; MLG; inventario forestal; Nothofagus pumilio; Tierra del Fuego. * Corresponding author: jmc@agro.unlp.edu.ar Recei...

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“…Bark of trees has different physiological properties; they are related to the ecology of the different tree species and provide different habitats for bark living arthropods (Nicolai 1986) or genetic control (Zhong et al, 2009). The thickness of the bark correlates with factors such as moisture availability, tree age, genetic and diameter classes (Sonmez et al, 2007). The lack of difference in bark thickness (Table 2) or percentage of bark (Fig.…”

Section: Discussionmentioning

confidence: 99%

Silviculture conditions and wood properties of Samanea saman and Enterolobium cyclocarpum in 19-year-old mixed plantations

Obando

Moya

2013

For. syst.

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Aim of study: The objective of this work is to examine wood properties of a mixed plantation of Samanea saman and Enterolobium cyclocarpum, combined with native species of Costa Rica.Area of study: Mixed plantation in dry tropical zone of Costa Rica.Material and Methods: It was measured by total diameter, heartwood, bark thickness, several physical wood properties (green density, specific gravity, volumetric, tangential and radial shrinkage and moisture content) and wood color.Main results: The largest of this diameter are reached when S. saman is planted with E. cyclocarpum, E. cyclocarpum and Swietenia macrophylla and Simarouba glauca. Meanwhile the largest total diameter and heartwood in E. cyclocarpum was found when this species is planted with Dalbergia retusa. Heartwood percentage, bark percentage, and some physical properties are not affected when S. saman or E. cyclocarpum are planted with other species. However, parameters of wood color were affected mixture plantation of S. saman or E. cyclocarpum with other species. The lowest difference between wood from mixed plantations and wood from trees growing in native forests is produced when S. saman is mixed with E. cyclocarpum, but this last species is mixed with Hymenaea courbaril and produced wood with the lowest difference in wood color compared to trees growing in the natural forest.Research highlights: S. saman and E. cyclocarpum tress planted in a mixed plantation produce variation in breast diameter, physical properties, heartwood percentage and wood color.Keywords: silvicultural condition; wood properties; tropical species; plantation species.

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Effect of aspect, tree age and tree diameter on bark thickness ofPicea orientalis

Cited by 44 publications

References 5 publications

Poder Calorífico Y Material Inorgánico en La Corteza De Seis Árboles Frutales

Poder Calorífico Y Material Inorgánico en La Corteza De Seis Árboles Frutales

Equations of bark thickness and volume profiles at different heights with easy-measurement variables

Silviculture conditions and wood properties of Samanea saman and Enterolobium cyclocarpum in 19-year-old mixed plantations

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