What is silviculture?
The art and science of controlling the establishment,
composition, structure, and growth of a forest stand to
meet the landowners’ objectives on a sustainable basis.
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Introduction - 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: Introduction, Silviculture, Biologically, Economically Feasible, Stand, Silvicultural System, Categories of Silvicultural Systems, Silvicultural Systems and Methods, Phase
Typology: Slides
2012/2013
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What is silviculture?
The art and science of controlling the establishment,
composition, structure, and growth of a forest stand to
meet the landowners’ objectives on a sustainable basis.
- Silviculturists (not silviculturalists) operate in the realm of
the biologically possible
- Only solutions that are simultaneously biologically
possible, economically feasible, and socially acceptable,
will be considered appropriate (and sustainable)
Silviculture Is Objective Driven
• Silviculturists affect the direction of stand development, but
there is often the reality of ‘you can’t get there from here’
The Stand
• A stand is a contiguous group of trees sufficiently
uniform in age or size class distribution,
composition, structure, site quality and/or location to
be a distinguishable unit.
- Silviculture is practiced at the stand level
- Forest management is primarily concerned with the forest (or tract), a collection of stands administered as an integrated unit
The Silvicultural System
- A silvicultural system encompasses everything that is done throughout a rotation
- In theory, it is unique for each stand
- The systems are named for their respective regeneration methods (e.g., shelterwood system, single-tree selection system)
- Naming convention identifies the structural character of a stand
The Silvicultural System
• Each silvicultural system should:
Silvicultural Systems and Methods
- A silvicultural system is named based upon the regeneration method used
- Regeneration methods are classified as follows:
- Even-aged
- Uneven-aged
- Two-aged (hybrid)
Establishment
An Example: Phases of an Even-Aged System
Phases of an Even-Aged System
Benefits
Site Preparation
Benefits
Phases of an Even-Aged System
Regeneration Methods
The Silvicultural System
- Modifications of a silvicultural method
- Type: apply different kinds of treatments
- Intensity: change the intensity of application
- Timing: alter timing of application
- Sequence: change the sequence of treatments over time
The Silvicultural System
• Modifications often implemented for non-timber
considerations:
Stand Development
Four Phases of Stand Development
1. Stand initiation (reorganization phase)
2. Stem exclusion (aggradation phase)
3. Understory reinitiation (transition phase)
4. Old growth (complex phase, steady-state)
- Each phase of stand development is accompanied by changes in stand structure and species composition.