Multi-tree cut-to-length harvesting of short-rotation poplar plantations

Magagnotti, Natascia; Spinelli, Raffaele; Kärhä, Kalle; Mederski, Piotr S.

doi:10.1007/s10342-020-01335-y

Cited by 30 publications

(24 citation statements)

References 28 publications

(28 reference statements)

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“…This fact could be explained by the change to multi-tree handing and the forming of new passages with a width of 1 m and a length corresponding to the crane's outreach, which is known as boom-corridor thinning in the literature [43,48]. Multi-tree handling and schematic thinning may increase harvesting productivity by up to 30% and are typically used for felling narrow trees with a DBH of less than 8-10 cm [49,50]. They are less often employed on plots along wide access trails (AT35).…”

Section: Discussionmentioning

confidence: 99%

Estimation of Productivity and Costs of Using a Track Mini-Harvester with a Stroke Head for the First Commercial Thinning of a Scots Pine Stand

Leszczyński

Stańczykiewicz

Kulak

et al. 2021

Forests

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The aim of the present work was to estimate the productivity and costs of timber harvesting and forwarding during the first commercial thinning of a Scots pine stand. Three harvesting models were introduced and compared: narrow trail, wide access trail, and schematic extraction. The analyzed harvesting equipment consisted of a track mini-excavator (34 kW) with a stroke harvester head (gripping range 4–30 cm), and a farm tractor coupled to a logging trailer with a hydraulic crane. Merchantable timber (roundwood with a minimum diameter of 5 cm inside bark) was harvested from a 25-year-old planted Scots pine stand growing on a grid of 1.4 m × 1.8 m. The study showed the productivity of the mini-harvester ranged from 3.09 to 3.47 m3/PMH15 (productive machine hours plus 15 min), and that of the forwarding equipment to be 4.07 m3/PMH15. The analyzed model of productivity as a function of tree volume and thinning intensity was statistically significant, but the intensity parameter was significant only on plots located along wide access trails (3.7 m) and insignificant on plots located along narrow access trails (2.5 m). The distance between trees was not found to be significant. The calculated net machine costs for the forwarding equipment and track mini-harvester were EUR 36.12 and 52.47 per PMH, respectively. An increase in the usage rate of the harvesting equipment to 80% would reduce the harvesting and forwarding costs to EUR 22.07/m3.

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Section: Discussionmentioning

confidence: 99%

Estimation of Productivity and Costs of Using a Track Mini-Harvester with a Stroke Head for the First Commercial Thinning of a Scots Pine Stand

Leszczyński

Stańczykiewicz

Kulak

et al. 2021

Forests

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show abstract

“…This fact could be explained by changing the operator behaviour to multi-tree handing technology and the forming of new passages with a width of 1 m and a length corresponding to the crane outreach, which is known in the literature as boom-corridor thinning [37,31]. Multi-tree handling and geometric thinning may considerably increase harvesting productivity (by up to 30%) and are typically used for felling narrow trees with a DBH of less than 8-10 cm [38,39]. This technology is less often employed on plots located along wide access trails (AT35).…”

Section: Discussionmentioning

confidence: 99%

Productivity and Cost Models for the First Commercial Thinning of a Scots Pine Stand Using an Excavator with an Arbro 400S Harvester Head and a Farm Tractor Coupled to a Logging Trailer

Leszczyński¹,

Stańczykiewicz²,

Kulak³

et al. 2021

Preprint

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The objective of the present work was to determine the productivity and costs of timber harvesting and skidding during the first commercial thinning of a Scots pine stand. The analyzed harvesting set consisted of a mini-excavator (34 kW) with an stroke harvester head (gripping range: 4–30 cm), and a farm tractor coupled to an logging trailer with a hydraulic crane. Merchantable timber (roundwood with a minimum diameter of 5 cm inside bark) was harvested from a 25-year old planted Scots pine stand growing on a grid of 1.4×1.8 m. The study showed the productivity of the mini-harvester range from 3.09 to 3.47 m3∙PMH15 -1, and that of the forwarding set to be 4.07 m3∙PMH15 -1. The analyzed model of productivity as a function of individual tree volume and thinning intensity was statistically significant, but the intensity parameter was significant only on plots located along wide access trails (3.7 m) and insignificant on plots located along the narrow access trial (2.5m). The intertree distance was not found to be significant. The calculated net machine costs for the forwarding set and mini-harvester were 36.12 Euro∙PMH 1 and 52.47 Euro∙PMH-1, respectively. An increase in the utilization rate of the harvesting set to 80% would reduce the timber harvesting and skidding costs to 22.07 Euro∙m-3.

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“…Which are rather methods that are more commonly used for fast-growing trees or trees cultivated on plantations (e.g. Magagnotti et al 2021;Latterini et al 2022).…”

Section: Determination Of Rotation Period Accordingmentioning

confidence: 99%

Comparison of the approach to determination of the rotation period of forest stands in the Czech Republic and in the Slovak Republic

Hillayová¹,

Holušová²,

Báliková³

et al. 2022

J. For. Sci.

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The exact determination of the rotation period is still a current and important essential issue of forestry. It attracts the attention of forest economists, managers and owners worldwide, not only of forest economists but also of forest managers. The rotation period is defined by physical, technical or financial parameters of forest management. Therefore, it is necessary to distinguish between the biological and the economic optimal rotation period. A fundamental challenge in forest management is the need for appropriate determination of the rotation period. The primary interest of our research was to compare the effective legislation for the determination of the rotation period in the Czech Republic and in the Slovak Republic. Scientific methods such as document analysis and questionnaire survey were applied. The results of the legislation analysis and other related documents were compared with the expert opinions of the relevant stakeholders. Those who affect the decision process related to the problem and those where are “affected” by the problem were involved in the study. Results show that respondents do not agree with the regulation of rotation period according to effective law. Moreover, they consider it as not usable as the conditions in forest ecosystems have changed recently, which is not considered in the legislation.

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Multi-tree cut-to-length harvesting of short-rotation poplar plantations

Cited by 30 publications

References 28 publications

Estimation of Productivity and Costs of Using a Track Mini-Harvester with a Stroke Head for the First Commercial Thinning of a Scots Pine Stand

Estimation of Productivity and Costs of Using a Track Mini-Harvester with a Stroke Head for the First Commercial Thinning of a Scots Pine Stand

Productivity and Cost Models for the First Commercial Thinning of a Scots Pine Stand Using an Excavator with an Arbro 400S Harvester Head and a Farm Tractor Coupled to a Logging Trailer

Comparison of the approach to determination of the rotation period of forest stands in the Czech Republic and in the Slovak Republic

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