Are we making the right choices with our jack pine plantations ?
description
Transcript of Are we making the right choices with our jack pine plantations ?
![Page 1: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/1.jpg)
Are we making the right choices with our jack pine
plantations ?
R. Schneider, F. Berninger
Capsis workshop
June 2008
![Page 2: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/2.jpg)
Lumber industry in Quebec
• Spruce, pine and fir are the most important species for the forest industry in Quebec and eastern Canada
• In 2005, 30.5 M m3 of softwood was used by the lumber industry, representing 75% of the total harvested volume
![Page 3: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/3.jpg)
Jack pine in Quebec
• 2nd most important reforestation species in the province (21.3 M seedlings for 13 200 ha in 2005)
• Spacing:– In the mid 70s: 2500 st/ha– In the mid 90s: 1750 st/ha
![Page 4: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/4.jpg)
Reasons for changing spacing
• Economic reasons:– Less costly to establish and thin
• Silviculture:– Larger trees with longer crowns at 1st thinning– Lower mortality with container seedlings
(10%, 8 years after) than with bare-root seedlings (33% , 8 years after) (Trottier 1998)
![Page 5: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/5.jpg)
What about lumber quality ?
• Knots cause up to 50% of the visual downgrades in jack pine plantation-grown lumber (Zhang et al. 2005)
• However, there are still uncertainties with respect to wood quality:– How do we manage our existing plantations ?– Should we establish our plantations in the
same way ?
![Page 6: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/6.jpg)
General objective
• Develop or adapt a tool to predict the effect of different scenarios on the growth and wood quality of jack pine
![Page 7: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/7.jpg)
General objective
• Develop or adapt a tool to predict the effect of different scenarios on the growth and wood quality of jack pine
Our choice:
PipeQual (Mäkelä and Mäkinen 2003)
![Page 8: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/8.jpg)
Why Capsis ?
• PipeQual is a complex model, where simulation software is essential
• Originally coded in Fortran by A. Mäkelä, a working copy was developed in Matlab to test Jack pine model adaptations
• We now need to transfer the results to our project partners, hence our interest in Capsis
![Page 9: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/9.jpg)
PipeQual structure(Mäkelä and Mäkinen 2003)
Structuralparameters
Distribution of growth by whorls
TREE WHORL
Modeloutputs
Initialconditions
BRANCH
![Page 10: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/10.jpg)
Internodal whorls ?
Nodal whorl
Internodal whorl
![Page 11: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/11.jpg)
Adjustment to PipeQual framework
Wf
Nodal
Inter nodal
Wfi
Wfi
Abi
Abi
Asi
![Page 12: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/12.jpg)
Integration into Capsis
GIdCard
GSettings
GModel MethodProvider
GStand
GTCStand
GTree
Step
Scenario
CModel
GrowthEngine
CStand CTree CSpecies
PipeQualSpecies
PipeQualWhorl
IdCard
JpSettings
JpModel
JpMethodProvider
JpStand
JackPineTree
JackPineSpecies
CSettings
capsis.kernel
capsis.lib.crobas
jackpine.model
![Page 13: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/13.jpg)
Types of output
GTraditional G & Y outputs
![Page 14: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/14.jpg)
Types of output
G
Hdom, Hmean, crown base
Traditional G & Y outputs
![Page 15: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/15.jpg)
Types of output
Traditional G & Y outputsG
Hdom, Hmean, crown base
Volume
![Page 16: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/16.jpg)
Types of output
Tree level detail
![Page 17: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/17.jpg)
Work in progress
• Provide methods to extract and illustrate cumulative branch basal area from whorl objects
• Integrate branch module to Capsis (already programmed in Matlab)
• Integrate links to and from bucking and sawing simulator to yield knot size and location on lumber and visual lumber grading
![Page 18: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/18.jpg)
Future developments
• Integrate other species : black spruce, white spruce, trembling aspen
• Extend simulations from homogeneous stands to mixed/complex structured stands
![Page 19: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/19.jpg)
Acknowledgements
• Research collaborators: É. Beaulieu, J. Bégin, P. Bernier, S. D’eon, H. Power, G. Prégent, E. Swift, C.H. Ung, S.Y. Zhang
• External collaborator: Annikki Mäkelä
![Page 20: Are we making the right choices with our jack pine plantations ?](https://reader035.fdocuments.us/reader035/viewer/2022062323/56815563550346895dc32f11/html5/thumbnails/20.jpg)