Schneider2007a

Référence

Schneider, R. (2007) Effet de l'éclaircie commerciale sur la croissance et la qualité du bois du pin gris. Thèse de doctorat, Université Laval. (URL )

Résumé

The effect of commercial thinning from below on the growth and yield, wood quality and financial value of jack pine (Pinus banksiana Lamb.) stands over a 15- to 25-year period was studied on five sites spread throughout eastern Canada using non linear mixed effect models. Individual tree results show that thinning increases diameter at breast height (dbh), with it being higher in stands with lower dominant height (HDOo) at time of thinning. At stand level, the results indicate that merchantable volume yield can be higher in lower density stands when thèse are made up of large stems and low HDOo. Sawlog volume is, on the other hand, increased by reducing stand density in stands with small diameter stems. Cumulative merchantable volume of dead stems is lowered by reduced stand densities, especially in stands with small stems. Wood density (ring density, earlywood density and latewood density), proportion of latewood in the ring and mechanical properties were used as indicators of wood quality. Wood density variables were ail related to ring width, relative height in the stem and cambial age. Wood bending stiffness (MOE), and strength (MOR) were found to increase with cambial age and wood density. Commercial thinning was found to only have an indirect effect on the studied variables by increasing ring width. From a financial perspective, the developed models indicate that lumber yield, product value and harvesting and conversion costs after moderate thinning are lower when compared to unthinned stands. Moderate thinning however increases net stand value, defined as the difference between product value and total costs. Moreover, heavy thinning has the lowest net stand value. High volume stands with small stems seem to be the ideal stands to target if high net stand value of the residual stand is desired.

Format EndNote

Vous pouvez importer cette référence dans EndNote.

Format BibTeX-CSV

Vous pouvez importer cette référence en format BibTeX-CSV.

Format BibTeX

Vous pouvez copier l'entrée BibTeX de cette référence ci-bas, ou l'importer directement dans un logiciel tel que JabRef .

@PHDTHESIS { Schneider2007a,
    AUTHOR = { Schneider, R. },
    TITLE = { Effet de l'éclaircie commerciale sur la croissance et la qualité du bois du pin gris },
    SCHOOL = { Université Laval },
    YEAR = { 2007 },
    ABSTRACT = { The effect of commercial thinning from below on the growth and yield, wood quality and financial value of jack pine (Pinus banksiana Lamb.) stands over a 15- to 25-year period was studied on five sites spread throughout eastern Canada using non linear mixed effect models. Individual tree results show that thinning increases diameter at breast height (dbh), with it being higher in stands with lower dominant height (HDOo) at time of thinning. At stand level, the results indicate that merchantable volume yield can be higher in lower density stands when thèse are made up of large stems and low HDOo. Sawlog volume is, on the other hand, increased by reducing stand density in stands with small diameter stems. Cumulative merchantable volume of dead stems is lowered by reduced stand densities, especially in stands with small stems. Wood density (ring density, earlywood density and latewood density), proportion of latewood in the ring and mechanical properties were used as indicators of wood quality. Wood density variables were ail related to ring width, relative height in the stem and cambial age. Wood bending stiffness (MOE), and strength (MOR) were found to increase with cambial age and wood density. Commercial thinning was found to only have an indirect effect on the studied variables by increasing ring width. From a financial perspective, the developed models indicate that lumber yield, product value and harvesting and conversion costs after moderate thinning are lower when compared to unthinned stands. Moderate thinning however increases net stand value, defined as the difference between product value and total costs. Moreover, heavy thinning has the lowest net stand value. High volume stands with small stems seem to be the ideal stands to target if high net stand value of the residual stand is desired. },
    OWNER = { amriv2 },
    TIMESTAMP = { 2012.05.16 },
    URL = { http://ariane.ulaval.ca/cgi-bin/recherche.cgi?qu=a1616772 },
}

********************************************************** *************************** FRQNT ************************ **********************************************************

Un regroupement stratégique du

********************************************************** ***************** Facebook Twitter *********************** **********************************************************

Abonnez-vous à
l'Infolettre du CEF!

********************************************************** ***************** Pub - ABC CBA 2020 ****************** **********************************************************

31 mai au 4 juin 2020

********************************************************** ***************** Pub - Symphonies_Boreales ****************** **********************************************************

********************************************************** ***************** Boîte à trucs *************** **********************************************************

CEF-Référence
La référence vedette !

Jérémie Alluard (2016) Les statistiques au moments de la rédaction 

  • Ce document a pour but de guider les étudiants à intégrer de manière appropriée une analyse statistique dans leur rapport de recherche.

Voir les autres...