Impact of whole-tree harvesting and compensatory fertilization on growth of coniferous thinning stands

Jacobson, Staffan; Kukkola, Mikko; Mälkönen, Eino; Tveite, Bjørn

doi:10.1016/s0378-1127(99)00159-0

Cited by 142 publications

(125 citation statements)

References 16 publications

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“…Furthermore, nutrient removal caused by full tree harvesting may inhibit growth of young stands (cf. Mård, 1998;Jacobson et al, 2000). To assess these effects efficiently and thoroughly, stand level growth and yield analysis using an optimizing approach may be required.…”

Section: Discussionmentioning

confidence: 99%

Simulation of harvester productivity in selective and boom-corridor thinning of young forests

Sängstuvall¹,

Bergström²,

Lämås³

et al. 2012

Scandinavian Journal of Forest Research

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Forest management practices may change in the future, due to increases in the extraction of forest fuel in first thinnings. Simulation models can be used to aid in developing new harvesting systems. We used such an approach to assess the productivity of innovative systems in various thinnings of young stands with wide ranges of mean breast height diameter (1.5 -15.6 cm), stems per hectare (1 000 -19 100) and mean height (2.3 -14.6 m).The results show that selective multiple-tree-handling increases productivity by 20 -46% compared to single-tree-handling. If the trees are cut in boom-corridors (narrow 10 m strips between strip roads), productivity increases up to 41%, compared to selective multiple-tree-handling. Moreover, if the trees are felled using area-based felling systems, productivity increases by 33 -199 %, compared to selective multiple-treehandling. For any given harvesting intensity , the increases in productivity were highest in the densest stands with small trees.The results were used to derive time consumption functions. Comparisons with time study results suggest that our simulation model successfully mimicked productivity in real-life forest operations, hence the model and derived functions should be useful for cost calculations and evaluating forest management scenarios in diverse stands.

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Section: Discussionmentioning

confidence: 99%

Simulation of harvester productivity in selective and boom-corridor thinning of young forests

Sängstuvall¹,

Bergström²,

Lämås³

et al. 2012

Scandinavian Journal of Forest Research

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“…This has generally (although not always) been found to be the case. In Fennoscandia, Jacobson et al (2000) demonstrated growth decreases in the first 10 years after WTH in thinnings of Norway spruce and Scots pine stands when compared with conventional thinnings. The growth reduction could be counteracted by nitrogen fertilisation and they concluded that the reduction was due to reduced nitrogen supply.…”

Section: Effects Of Harvesting Intensity On Forest Regeneration and Pmentioning

confidence: 97%

Ecological Consequences of Increased Biomass Removal for Bioenergy from Boreal Forests

Clarke¹

2012

Sustainable Forest Management - Current Research

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“…For instance, about 60-70% of the nitrogen content of trees is stored in the residues, only 30-40% in the trunk (Egnell et al 1998(Egnell et al , 2006. Thus, 60-130 kg of nitrogen -the key limiting factor for forest productivity -can be lost per hectare due to residue harvesting after thinning (Jacobson et al 2000). The loss due to residue harvesting after final cutting is larger; some 200-400 kg of nitrogen can potentially be lost from the system together with the residues if the needles are included (Egnell et al 1998(Egnell et al , 2006.…”

Section: Effects Of Harvesting Non-standard Woody Resourcesmentioning

confidence: 99%

“…This in turn may decrease the mineralization of nitrogen, making the element less accessible (Olsson et al 1996. Residue harvesting may therefore decrease tree growth (Jacobson et al 2000) and, hence, perhaps also the biodiversity. When nitrogen losses are not compensated by input of nitrogen via atmospheric deposition or nitrogen fixation, nitrogen fertilization may become necessary.…”

Section: Effects Of Harvesting Non-standard Woody Resourcesmentioning

confidence: 99%

Increased biomass harvesting for bioenergy

Framstad¹,

Berglund²,

Gundersen³

et al. 2009

TemaNord

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Increased biomass harvesting for bioenergy Nordic co-operationNordic cooperation is one of the world's most extensive forms of regional collaboration, involving Denmark, Finland, Iceland, Norway, Sweden, and three autonomous areas: the Faroe Islands, Greenland, and Åland.Nordic cooperation has firm traditions in politics, the economy, and culture. It plays an important role in European and international collaboration, and aims at creating a strong Nordic community in a strong Europe.Nordic cooperation seeks to safeguard Nordic and regional interests and principles in the global community. The current supply of renewable bioenergy in Finland, Norway, and Sweden is equivalent to 83 TWh, 15 TWh, and 104 TWh, respectively, of which more than 90% comes from the forest sector. Assessments for total supplies of bioenergy by 2020 vary but are in the order of 126 TWh, 34 TWh, and 151 TWh for Finland, Norway and Sweden, respectively. Many biomass harvesting options exist but they are not all equally likely in the Nordic countries. Based on various public recommendations and the current debate on the use of biomass, the following options need to be considered from forests, farmland and mires and wetlands. Increased harvesting of logging residues, stumps, trees from tending and thinning of young forest, and non-standard wood from current logging areas, especially from forestry districts near roads and facilities for effective use of the biomass resources (e.g., heating plants, industrial facilities).  Increased intensity of forest cultivation activities, such as building of forest roads, soil preparation, nitrogen fertilization, planting, various thinning regimes, use of high-yield varieties or species, and shorter rotation time, on current logging areas.  Increased harvesting of woody residues from clearing of power line corridors and along roads where effective transportation to facilities for use of the biomass is possible.  Increased harvesting from currently non-commercial forest as well as increased afforestation may be relevant under suitable economical constraints, especially in Norway.  Increased cultivation of energy crops on arable land, such as grains, oilseed crops, and grasses, primarily in Finland and Sweden. Increased biomass harvesting for bioenergy 10 Increased short rotation forestry with willows and poplars on farmland, primarily in Finland and Sweden.  Increased harvesting of wood resources from marginal agricultural land, field edges etc, to a limited extent where the biomass can be exploited locally.  Biomass harvesting from mires and wetlands may primarily be in the form of harvesting of Sphagnum and canary reed grass on former peat mining areas and harvesting reed in shallow water bodies, mainly in Finland.The following biomass harvesting measures will in most cases be acceptable or have only minor negative effects: Harvesting of logging residues, including trees from tending of young forest and thinning, seems to be among the more acceptable forms of biomass harvesting. It will probably ha...

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Impact of whole-tree harvesting and compensatory fertilization on growth of coniferous thinning stands

Cited by 142 publications

References 16 publications

Simulation of harvester productivity in selective and boom-corridor thinning of young forests

Simulation of harvester productivity in selective and boom-corridor thinning of young forests

Ecological Consequences of Increased Biomass Removal for Bioenergy from Boreal Forests

Increased biomass harvesting for bioenergy

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