Enhancing the Efficiency of Thinning Operations in Dense Two-Row Plantations

The article addresses the current challenge of performing thinning operations in forest stands with a two-row tree arrangement established through artificial reforestation. A critical analysis of existing technological solutions used in harvesting stands with a two-row configuration has been conducted. It has been determined that the application of traditional tree felling methods: mechanized (using chainsaws), combined (using forwarders), and machine-based (using harvesters) – under conditions of a closed canopy and narrow row spacing leads to significant damage to trees left for subsequent growth (leave trees). As an alternative solution, an improved felling method utilizing a compact logging tractor equipped with a hydraulic manipulator featuring a felling bumper is proposed. The developed method is aimed at minimizing damage to residual stands and ensuring the controlled placement of felled trees along the skid trail. The operational technology is described in detail, involving the reception of the tree by the manipulator's bumper followed by its controlled laying along the inter-row space. The results of field trials are presented, confirming the difficulties of the felling process under traditional operational conditions and highlighting the relevance of the new method for reducing damage to trees remaining in the cutting area and ensuring their alignment along the skid road. The proposed approach overcomes a key technological bottleneck during the first commercial thinning in two-row plantations, ensuring both economic efficiency and the preservation of future stand quality. The described technical solution is of practical interest to enterprises engaged in logging operations within an intensive silvicultural model.

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