SchneiderBerningerZhangEtAl2009

Référence

Schneider, R., Berninger, F., Zhang, S.Y. and Ung, C.-H. (2009) Integrating a wood-quality module with a growth simulator to quantify silvicultural scenarios in jack pine plantations (Are we making the right choices?). Technical report 791, USDA Forest Service - General Technical Report PNW-GTR. (Scopus )

Résumé

Initial planting density has a critical effect on establishment costs, growth and yield, product quality, and value recovery. Initial planting density for major softwoods in Quebec was lowered in the early 1990's in order to increase the success of future thinnings and to reduce plantation establishment costs. While these reasons might seem sound, we still do not fully understand the impact of this decision on growth, yield, and wood quality of these plantations. Furthermore, not enough is known about the interaction between thinnings, initial stand density, and site fertility or the effects of these interactions on the growth, yield, and wood quality. To address some of these questions before experimental plots become mature enough to provide empirical evidence, a process-based growth simulator is being developed for jack pine plantations based on the CroBas model. The simulator has a wood-quality module that yields estimates of branch diameter and insertion angle as well as wood density and bending properties. Emphasis is placed on this module to quantify the impact of silvicultural regimes on wood quality and compare the simulated results with field data from several plantations sampled across Eastern Canada. Preliminary results indicate that total branch basal area of the stem decreases exponentially with increasing initial stand density, and this trend holds true over time. In addition, initial validation shows very little bias in height growth predictions in young plantations.

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@TECHREPORT { SchneiderBerningerZhangEtAl2009,
    AUTHOR = { Schneider, R. and Berninger, F. and Zhang, S.Y. and Ung, C.-H. },
    TITLE = { Integrating a wood-quality module with a growth simulator to quantify silvicultural scenarios in jack pine plantations (Are we making the right choices?) },
    INSTITUTION = { USDA Forest Service - General Technical Report PNW-GTR },
    YEAR = { 2009 },
    NUMBER = { 791 },
    ABSTRACT = { Initial planting density has a critical effect on establishment costs, growth and yield, product quality, and value recovery. Initial planting density for major softwoods in Quebec was lowered in the early 1990's in order to increase the success of future thinnings and to reduce plantation establishment costs. While these reasons might seem sound, we still do not fully understand the impact of this decision on growth, yield, and wood quality of these plantations. Furthermore, not enough is known about the interaction between thinnings, initial stand density, and site fertility or the effects of these interactions on the growth, yield, and wood quality. To address some of these questions before experimental plots become mature enough to provide empirical evidence, a process-based growth simulator is being developed for jack pine plantations based on the CroBas model. The simulator has a wood-quality module that yields estimates of branch diameter and insertion angle as well as wood density and bending properties. Emphasis is placed on this module to quantify the impact of silvicultural regimes on wood quality and compare the simulated results with field data from several plantations sampled across Eastern Canada. Preliminary results indicate that total branch basal area of the stem decreases exponentially with increasing initial stand density, and this trend holds true over time. In addition, initial validation shows very little bias in height growth predictions in young plantations. },
    COMMENT = { Export Date: 17 May 2012 Source: Scopus },
    ISSN = { 08874840 (ISSN) },
    JOURNAL = { USDA Forest Service - General Technical Report PNW-GTR },
    KEYWORDS = { bending, estimation method, growth modeling, plantation forestry, population density, silviculture, simulation, stand structure, tree planting, wood quality, yield response, young population, Canada, North America, Quebec [Canada], Pinus banksiana },
    OWNER = { Luc },
    PAGES = { 167-168 },
    TIMESTAMP = { 2012.05.17 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-70349601816&partnerID=40&md5=f34d1455065743bedc247c2150e0ed15 },
}

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