Английская Википедия:Cut-to-length logging

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Шаблон:More citations needed

Cut-to-length logging (CTL) is a mechanized harvesting system in which trees are delimbed and cut to length directly at the stump.[1] CTL is typically a two-man, two-machine operation with a harvester felling, delimbing, and bucking trees and a forwarder transporting the logs from the felling to a landing area close to a road accessible by trucks.[2][3]

Файл:TJ harvesteri.jpg
Harvester
Файл:Log forwarder.jpg
Forwarder

The capital costs for a typical CTL operation, with one harvester and one forwarder, are quite high. The price of a pair of machines alone are approx. US$1,000,000.

CTL is the primary logging method in European countries,[4] while full-tree logging and the even older technique of tree-length logging are more popular in North America and less developed countries, where tree sizes can exceed the capacity of the harvester's felling head, i.e., tree stems with a butt diameter of over 90 centimeters.Шаблон:Cn CTL lends itself to timber harvesting in plantation forestry where stems are often harvested before they reach large dimensions.[4]

Advantages compared to full-tree logging

  • Cleaner wood since the logs are not skidded on the ground to the landing (in tree length more than full tree)
  • More fresh wood (in tree length more than full tree)
  • Less damage to retained trees in thinning operations
  • Typically requires fewer types of machines in an operation
  • No need to clear large landings close to the road
  • Greater personnel safety due to enclosed/protected machine cabs
  • More environmentally friendly due to:
    • less soil disturbance than in skidding operations (if improper skidding practices take place)
    • no slash dumped at the landing
    • higher retention of foliar nutrients within the harvested area

Disadvantages compared to full-tree logging

  • Somewhat higher capital cost per volume when used in large scale clear cuts
  • Use of more advanced technology requires more operator knowledge and training

References

Шаблон:Reflist

Шаблон:Forestry

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ Ошибка цитирования Неверный тег <ref>; для сносок timberline не указан текст
  2. ↑ Ошибка цитирования Неверный тег <ref>; для сносок ponsse не указан текст
  3. ↑ Ошибка цитирования Неверный тег <ref>; для сносок kotrba не указан текст
  4. ↑ 4,0 4,1 Ошибка цитирования Неверный тег <ref>; для сносок forests не указан текст
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