Release Treatments
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Release 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: Release Treatments, Silvicultural System, Competing Vegetation, Weeding, Cleaning, Liberation, Herbicides, Salvage Cutting, Sanitation Cutting, Prescribed Burning
Typology: Slides
2012/2013
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Release Treatments
How intermediate treatments fit into a silvicultural system
Release Treatments: Weeding, Cleaning, Liberation
- Objectives for a release operation include:
Release Treatments: Weeding, Cleaning, Liberation
- Release is typically divided into three classes of treatment:
Release Treatments: Weeding
- Methods:
- Relative growth rates:
total vegetation control > herbaceous only > woody only > no control
Release Treatments: Cleaning
Cleaning
Treatment made in a stand not past the sapling stage in order to free favored trees from less desirable individuals of the same age but different species (or inferior quality) which overtop them or are likely to do so
Release Treatments: Liberation
Liberation
A treatment made in a stand not past the sapling stage in order to free the favored trees from competition of older, overtopping vegetation
Release Treatments: Liberation
- Methods for liberation
- Cutting
- Girdling
- Herbicides
Other Intermediate Operations
Improvement Cutting
A cutting made in a stand past the sapling stage in order to improve composition, growth, and quality by removing less desirable trees of any species from the main canopy
- Where trees are not merchantable, this is often called TSI (timber stand improvement) and is accomplished by injecting herbicides
Other Intermediate Operations
Salvage Cutting
The removal of dead trees or trees being damaged or killed by injurious agents other than competition (e.g., insects, disease, fire, wind), in order to obtain monetary value that would otherwise be lost
Other Intermediate Operations
Prescribed Burning as an intermediate stand treatment
Other Intermediate Operations
• Objectives of prescribed fire
Other Intermediate Operations
Forest Fertilization
- An investment, so desirable only where nutrient deficiency is limiting growth significantly
- Should apply based on diagnostic criteria
- N and P are the most commonly applied nutrients
- Timing is critical (spring or early summer)
- N application usually not a good idea at time of planting
- Fertilization can improve wildlife food availability and quantity
Other Intermediate Operations
Tree Pruning
Loss or removal of tree branches, by natural or artificial means
- Natural pruning (i.e., self-pruning) is usually initiated by shading
- Encourage natural pruning by maintaining a high stand density
- Artificial pruning is an investment, so only use it where it pays