Silvicultural systems

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Presentation transcript:

Silvicultural systems

What is a Silvicultural system? A silvicultural system is the process of tending, harvesting and regenerating a forest. Different objectives in forest management (e.g. conservation in an ancient semi-natural woodland vs. production of timber from a conifer plantation) are likely to lead to the adoption of different silvicultural systems. Forestry Commission. www.forestry.gov.uk/forestresearch

http://www. forestresearch. gov. uk/website/fo restresearch http://www.forestresearch.gov.uk/website/fo restresearch.nsf/ByUnique/INFD-6V4BGP

SYSTEMS Generally divide into 2 main groups HIGH FOREST SYSTEMS COPPPICE SYSTEMS http://tyfcoed.bangor.ac.uk/

There are many different types of silvicultural systems CLASSIFYING SYSTEMS There are many different types of silvicultural systems A broad classification can be made based on the pattern of regeneration and how the tree canopy is removed. Forestry Commission. www.forestry.gov.uk/forestresearch

Generally forests managed using clear felling and shelterwood systems tend to be even- aged (only possess one or two canopy strata) and those managed using selection systems are uneven-aged (have three or more canopy strata).

Silvicultural systems Clearfelling Complete removal of trees and artificial regeneration. Uniform shelterwood system Uniform opening of the canopy for regeneration purposes Strip shelterwood Opening up of crop in narrow coupes Opening up of groups of advance regeneration – comparitively short regen period ‘Rolling system’

COPPICE SYSTEMS Coppice Coppice with standards

HIGH FOREST SYSTEMS CLEAR CUT SYSTEMS - old crop felled in single felling Usually artificial regeneration Crop felled in 2 or more regeneration fellings SHELTERWOOD SYSTEMS SELECTION SYSTEMS

CLEAR CUT

Shelterwood systems

Uniform shelterwood system

Shelterwood systems Uniform Group Irregular Strip

Selection systems Complex Single tree selection Adaptations on this Bradford Hutt system

A Classification of Silvicultural systems BUT you can also get combinations of these or variations on them www.forestry.go v.uk/.../fruneven agedsilviculture 0001.../fruneven agedsilviculture 0001.pdf