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Titolo:
Single-tree and group selection in montane Norway spruce stands: factors influencing operational efficiency
Autore:
Suadicani, K; Fjeld, D;
Indirizzi:
Danish Forest & Landscape Res Inst, Dept Forestry, DK-2970 Horsholm, Denmark Danish Forest & Landscape Res Inst Horsholm Denmark DK-2970 olm, Denmark Agr Univ Norway, Norwegian Forest Res Inst, Dept Forest Operat Econ & Prod, N-1432 As Nlh, Norway Agr Univ Norway As Nlh Norway N-1432 Econ & Prod, N-1432 As Nlh, Norway
Titolo Testata:
SCANDINAVIAN JOURNAL OF FOREST RESEARCH
fascicolo: 1, volume: 16, anno: 2001,
pagine: 79 - 87
SICI:
0282-7581(2001)16:1<79:SAGSIM>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Keywords:
productivity; selection harvesting; single-grip harvester; uneven-aged stand;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Suadicani, K Danish Forest & Landscape Res Inst, Dept Forestry, DK-2970 Horsholm, Denmark Danish Forest & Landscape Res Inst Horsholm Denmark DK-2970
Citazione:
K. Suadicani e D. Fjeld, "Single-tree and group selection in montane Norway spruce stands: factors influencing operational efficiency", SC J FOR R, 16(1), 2001, pp. 79-87

Abstract

The operational efficiency of single-tree and group selection with a single-grip harvester was studied in uneven-aged spruce forests at high altitudes in southern Norway. Three harvest intensities of single-tree selection and two group sizes were examined in group selection. Single-tree selection included harvest intensities of 25, 45 and 65% of basal area. Group sizes for group selection were 0.063 and 0.250 ha. Normally, single-tree selection is considered less efficient than group selection or clear-cutting. In thisstudy, because time consumption per cubic metre was primarily dependent upon average harvested tree volume, the large harvested tree size for single-tree selection allowed this treatment to be more efficient than group selection. The two blocks in this study were part of a larger design of five blocks with identical treatments under varying stand conditions. The relative operational efficiency of single-tree selection compared with group selection was greatest in stands of low stocking. Other studies have also shown that mechanical damage to the residual stand is lowest under these conditions.

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Documento generato il 18/09/20 alle ore 17:18:35