western larch
Download
Skip this Video
Download Presentation
Western Larch

Loading in 2 Seconds...

play fullscreen
1 / 58

Western Larch - PowerPoint PPT Presentation


  • 372 Views
  • Uploaded on

Western Larch. The Secrets of Success. Inland Empire Paper Company Dennis Parent Forest Operations Manager. Summary. Review silvics of larch Review larch silvicultural treatments My “Secrets” of growing larch. Silvics of Western Larch.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Western Larch' - hedda


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
western larch

Western Larch

The Secrets of Success

Inland Empire Paper Company

Dennis Parent

Forest Operations Manager

summary
Summary
  • Review silvics of larch
  • Review larch silvicultural treatments
  • My “Secrets” of growing larch
silvics of western larch
Silvics of Western Larch
  • Western Larch: a “deciduous conifer in an evergreen world”
silvics of western larch4
Silvics of Western Larch
  • Silvics of North America

Available on the Internet: “Silvics of North American Trees”

silvics of western larch5
Silvics of Western Larch

Silvics of Western Larch

Silvics of Western Larch

  • 10 species total
  • Three species in U.S.
    • Western larch
      • (Larix occidentalis)
    • Subalpine larch
      • (Larix lyallii)
    • Eastern larch
      • (Larix laricina)
  • The tallest and the largest of the world’s larches
  • A seral species
slide6
Comparative Shade Tolerance

of Northwestern Conifers

silvics of western larch7
Silvics of Western Larch
  • Growth
    • Fastest growing species in Inland Northwest
    • Diameter growth very sensitive to stand density
    • Develops into even-aged stands
    • Height growth both predetermined and free
silvics of western larch8
Silvics of Western Larch
  • Fire resistant
  • Wind firm
  • Tolerates root rot
  • Tolerates soils with poor nutrition
  • Wood is hard, strong, and dense.
silvics of western larch9
Silvics of Western Larch

Insects, Diseases, Etc.

insects diseases11
Insects & Diseases

Larch casebearer

insects diseases14
Insects & Diseases

Spruce budworm

Heart rot

Beetles, a recent phenomenon

silvics of western larch15
Silvics of Western Larch
  • Cones & seed
    • Flowers very early
    • One of the best seed producers in northwest Montana
    • One of the worst seed producers in northern Idaho
silvics of western larch16
Silvics of Western Larch
  • Genetics
    • Seed transfer is relatively broad
    • Adaptability intermediate between white pine and ponderosa pine
silvics of western larch17
Silvics of Western Larch
  • Larch nutrition
    • Little information
    • High nitrogen use efficiency
    • Effectively translocates nitrogen
silvics of western larch18
Silvics of Western Larch
  • Water use
    • Less efficient than other conifers
    • Avoids winter desiccation
silvics of western larch19
Silvics of Western Larch
  • Carbon fixation
    • Efficient crown architecture
    • Small, short branches
    • Photosynthetic rate similar on a leaf area basis
    • Photosynthetic rate greater on leaf weight basis
    • Result: Larch fixes the same amount of carbon as other conifers
silvics of western larch20
Silvics of Western Larch
  • Watershed values
    • Little snow interception
    • Higher water yield
    • Higher melt rates from ROS
silvics of western larch21
Silvics of Western Larch
  • Aesthetics
    • Color diversity
    • Beautiful landscapes
special problems of western larch
Special Problems of Western Larch
  • Needs adequate site preparation
  • Losses crown quickly if overtopped
  • Susceptible to herbicides
  • Poor seed yields
  • Foresters and loggers!
special strengths of western larch
Special Strengths of Western Larch
  • Fire resistant
  • Favored by wildfire
special strengths of western larch25
Special Strengths of Western Larch
  • Fire resistant
  • Favored by wildfire
  • Resistant to root rot
special strengths of western larch27
Special Strengths of Western Larch
  • Fire resistant
  • Favored by wildfire
  • Resistant to root rot
  • Genetic adaptability
slide28
Potential for Genetic Improvement

of Inland Species

  • Genetic Characteristics of Western Larch
  • Highest potential gain in volume through genetic improvement: 20-40 percent
  • Higher value species
  • Fastest growth
  • Poor natural seed yields
  • Easy to graft
  • Seed transfer is relatively broad
  • Responds to intensive management
special strengths of western larch29
Special Strengths of Western Larch
  • Fire resistant
  • Favored by wildfire
  • Resistant to root rot
  • Genetic adaptability
  • Strong wood
special strengths of western larch31
Special Strengths of Western Larch
  • Fire resistant
  • Favored by wildfire
  • Resistant to root rot
  • Genetic adaptability
  • Strong wood
  • Fast juvenile growth
  • Wind firm
  • Resists snow and ice loading
  • Good long-lived snag species
  • Arabinogalactan
silvicultural treatments
Silvicultural Treatments
  • Natural Regeneration
      • Good site preparation
silvicultural treatments33
Silvicultural Treatments
  • Natural Regeneration
    • Predict cone crop
silvicultural treatments34
Silvicultural Treatments
  • Natural Regeneration
    • Enhance seed production by girdling
silvicultural treatments35
Silvicultural Treatments
  • Artificial Regeneration
      • Good site preparation = good survival
silvicultural treatments36
Silvicultural Treatments
  • Artificial Regeneration
      • Plant seedlings as large as you can afford.
silvicultural treatments37
Silvicultural Treatments
  • Artificial Regeneration
    • Spring vs. fall plant
silvicultural treatments38
Silvicultural Treatments
  • Vegetation control
    • Do it before planting!
slide39
For this

Instead of this

silvicultural treatments40
Silvicultural Treatments
  • Vegetation control
    • Oust herbicide may work
silvicultural treatments41
Silvicultural Treatments
  • Density control
    • Principles of thinning
      • Concentrate growth on fewer stems
      • Decrease total stand growth
      • Increase merchantable stand yield
      • Total stand cubic foot yields are not increased.
silvicultural treatments42
Silvicultural Treatments
  • Precommercial thinning
    • Watch out for:
      • High costs = poor investment
silvicultural treatments44
Silvicultural Treatments
  • Density control
    • Precommercial thin but watch for:
      • High costs = poor investment
      • Trees getting too big
      • Thinning too late => crown loss
silvicultural treatments45
Silvicultural Treatments
  • Density control
    • PCT conclusions
      • Thin early
      • Thin from below
      • Select spacing carefully
silvicultural treatments46
Silvicultural Treatments
  • Density control
    • Commercial thinning – some problems
      • Opens up stand to brush competition
      • Stand growth loss
      • Larger trees are not worth more money today.
silvicultural treatments47
Silvicultural Treatments
  • Density control
    • Other objectives for commercial thinning
      • Growing large diameter trees
      • Structural and vegetation diversity
      • Aesthetics
      • Earlier income generation
      • Perpetuate culmination of MAI
silvicultural treatments48
Silvicultural Treatments
  • Density control
    • Affect of thinning on wood strength
      • Not ring width, but summerwood/springwood ratio
      • Thinning can increase summerwood/springwood ratio
      • Thinning does not decrease wood strength
      • Young, managed larch has similar wood density levels as those found in natural stands.
      • This is not true for other western conifers!
silvicultural treatments49
Silvicultural Treatments
  • Pruning
    • Not necessary and probably a waste of money
      • Natural self-pruning
      • Epicormic branching
      • Dimension lumber; 1-2” knots acceptable
silvicultural treatments50
Silvicultural Treatments
  • Nutrition & fertilization
    • Little information available
      • Castille, 1983: Two-year growth
      • Filip and Oester, 2002: Ten-year growth
      • Graham, 1986: Effect on cone and seed production
      • IFTNC: Field trials on Boise Cascade lands
      • No firm conclusions for larch
harvest systems
Harvest Systems
  • Selection – NO!
  • Shelterwood – less than 40 sq. ft. BA/acre
  • Seed Tree - OK
  • Clearcut - OK
harvest systems52
Harvest Systems
  • Clearcut
    • Minimum opening size: 15-20 acres
    • Cut hard to regenerate western larch
larch the secrets of success
Larch – The “Secrets” of Success

Look for seed

Adequate site preparation

Realize importance of planting

Control density

Heavy harvest for regeneration

larch is tough
Larch is Tough

1 Year Old

2 Years Old

larch grows rapidly
Larch Grows Rapidly

Western Larch

3 Years Old

4 Years Old

larch is queen
Larch is “Queen”

Western Larch

6 Years Old

6 Years Old

opportunities for larch
Opportunities for Larch

4 Year Old Plantation

13 Year Old Plantation

thank you
Thank You
  • Acknowledgements:
    • Carl Fiedler – Univ. of Montana
    • Joel Fields – Wilbur-Ellis
    • Kennon McClintock – Forest Capital
    • Terri Jain -- RMRS
    • Russ Graham – RMRS
    • Russ Hudson – retired forester
    • Terry Shaw –IFTNC
ad