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NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.

NIBIO POP → NIBIO Rapport → NIBIO Bok →

2006

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N Erbilgin Paal Krokene Erik Christiansen G Zeneli J Gershenzon

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Marianne Stenrød Marie-Paule Charnay Pierre Benoit Ole Martin Eklo

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R Slimestad Ingunn M. Vågen

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Bjørn Økland Olav Skarpaas Kyrre Linné Kausrud Nils Christian Stenseth Nadir Erbilgin

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Volkmar Timmermann

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Christian Guido Bruckner Rahul Bahulikar Peter, G. Kroth

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Kjell Andreassen Aksel Granhus Karl Thunes

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In this study, forest treated with different strengths of selective cutting (2570 % of volume removed) was remeasured after twelve years in 2005. At each of the sixteen 0.2 ha plots, including four repeats of each treatment, all trees larger than dbh 2.5 cm were calipered. We investigated growth, changes in stand structure, tree age, tree damage and crown condition.The diameter distribution displayed a reverse J-curve at all plots both before and after the cuttings. Twelve years later the curve is only slightly changed. Increment cores from 300 trees were taken to analyse annual growth reactions in different diameter classes. Most trees reacted with increased growth from the second or third year after the cutting.This improved growth accelerated the following six or seven years with 20-80% increase. Both small and large trees reacted, including severely suppressed trees. The initial crown volume and crown vitality after cutting is essential for the increased growth since several years are necessary to build up a larger and better crown. The relationship between increased growth and reduced volume per hectare indicates less competition between trees regarding nutrients and light after the cutting.

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Erik Næsset Terje Gobakken Annika Kangas Matti Maltamo Ole Martin Bollandsås Tord Aasland Svein Solberg

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Svein Solberg Erik Næsset Kjersti Holt Hanssen Erik Christiansen

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Forfattere

Mikael Frisk Kurt Jörnsten Maud Göthe-Lundgren Mikael Rönnqvist Mikael Rönnqvist

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Transportation planning is an important part of the wood flow chain in forestry. There are often several forest companies operating in the same region and co-ordination between two or more companies is rare. However, there is an increasing interest in collaborative planning as the potential savings are large, often in the range 5-15%. A key question is how savings should be distributed among the participants. In this paper we investigate a number of possibilities based on economic models including Shapley value, the nucleolus, separable and non-separable costs, shadow prices and volume weights. We also propose a new allocation method based on finding as equal relative profits as possible among the participants. A case study including eight forest companies is described and analyzed.