Intermediate Silvicultural Treatments
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Intermediate Silvicultural Treatments - Silviculture - Lecture Slides, Slides of Forestry
Silviculture course teaches how to develop and apply silvicultural prescriptions and learn the effects of these prescriptions on timber and non-timber forest benefits, forest health and biodiversity, soil, and water resources as well as their effect on broader social, economic, and ecological issues. This lecture keywords are: Intermediate Silvicultural Treatments, Improvement Cutting, Sanitation and Salvage, Fertilization, Silvicultural System, Thinning, Thinning Increases Diameter Growth, Effe
Typology: Slides
2012/2013
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Intermediate Silvicultural Treatments
Summary of Intermediate Stand Treatments
- Thinning
- Release
- Improvement cutting (TSI)
- Sanitation and Salvage
- Fertilization
- Pruning
- Prescribed Fire
How intermediate treatments fit into a silvicultural system
Textbook Chapters by Topic
- • Thinning: Ch 17, 18,
- • Release Treatments: Ch
- • Improvement, Sanitation and Salvage: Ch
- • Pruning: Ch
What is Thinning?
- Defined by Nyland as:
“A treatment to increase the diameter increment of residual trees, improve stand quality and health, and increase stand level production by cutting excess and potential mortality trees without permanently breaking the crown canopy ”
When we thin a stand…
- We are reallocating growing space to the residual trees
- Which residual trees you choose depends in large part on your objectives
Effects of Thinning on Individual Growth
- Thinning increases diameter growth
1959 1969 1979
Effects of Thinning on Individual Growth
Effect of Thinning on Stand Growth
- Thinning recovers the yield in potential mortality trees and excess growing stock, increasing the total realized yield over an even-aged rotation for large diameter sawlogs
Effects of Thinning
- Four major factors influencing long-term growth following thinning: 1. 2. 3. 4.
- Timing of thinning and site quality impact cumulative stand yield
- Period of post-thinning growth increase vary due to spacing and a tree’s competitive position.
What is epicormic branching?
Methods of Thinning
- Primary thinning methods
- Low thinning
- Crown thinning
- Selection thinning
- Geometric thinning
- Free thinning