This project fits Timber Growth and Value Program 3.2 Wood Quality. The project will improve knowledge-based science to support improving timber growth and value by: ? improving Tree and Stand Simulator (TASS, versions II and III), a growth model that relates timber volume and value to site, stand, species and management activities; ? adding a key species, lodgepole pine (Pinus contorta Doug. ex Loud. var. latifolia Engelm.) to SYLVER (a decision support system that evaluates the economic impact of management activities); ? expanding wood quality and lumber recovery studies previously conducted on lodgepole pine by Forintek Canada Corp.; ? providing the first link between crown characteristics and wood attributes for lodgepole pine in BC; ? providing scientific basis for silvicultural efforts to restock stands after mountain pine beetle (Dendroctonus ponderosae) outbreaks; ? providing a detailed framework for modelling crown and branch morphology to link with other decision models, such as a 3-D sawmill simulator, light models, ecological indicators, and pest systems. From 2003 to 2005, we sampled 60 lodgepole pine in the central interior and collected data on bole (heights, diameters, whorls), crown (branch length, diameter inside and outside bark, foliar biomass, leaf area) and neighbouring trees. We have measured relative density along two radii, pith to bark, on 375 discs taken at 10-13 intervals along the stem from trees sampled in 2003. The Australian system, SilviScan, measured micro-fibril angle and calculated modulus of elasticity for a breast -height disc from each of the 30 trees sampled in 2003. Relative density, micro-fibril angle and modulus of elasticity will also be measured on the 30 lodgepole pine collected in 2004. In 2005-2006, we propose to undertake analysis of collected data and begin publication and extension of the results. We will relate crown characteristics (foliar biomass or leaf area) to important ring variables that predict specific wood characteristics (e.g., ring size, relative density, percent earlywood, fibre length and coarseness). In addition, the data analysis of distribution, size and growth rate of branches will provide equations and routines to generate knot populations for each tree. This information will then be coded into TASS II (operational version) and III (developmental version) and simulation results will be passed to 2-D and 3-D sawmill simulators already linked in the Ministry?s decision support system. Results will be used to recommend appropriate management regimes to enhance stand values.
Mansfield, Shawn D., Parish, Roberta; Goudie, James W.; Kang, Kyu-Young; Ott, Peter K.; Di Lucca, C. Mario. 2007. Modelling the impact of stand management activities on the wood characteristics of lodgepole pine. Forest Investment Account (FIA) - Forest Science Program. Forest Investment Account Report. FIA2007MR393