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Harvester efficiency in trunk utilisation and log quality of early thinning pine trees

机译：Harvester在Trunk利用的效率和早期稀疏松树的日志质量

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Obtaining high harvester efficiency in young pine stands during early thinning is achallenging management practice. One of the difficulties lies in achieving the optimal use of the tree trunk for assortments and obtaining satisfactory timber quality. The objective of this research was to find out 1) how much of the tree trunk can be processed by a harvester to produce logs, and 2) the quality of the assortments in terms of log length accuracy and delimbing quality. The work was carried out in a 31-year-old pine stand in northern Poland with the Vimek 404 5T harvester with the Keto Forst Silver head for early thinning. Eighty sample plots were set up within the stand for detailed tree analysis after harvesting. The total length of the assortments from each tree was measured as well as the minimal top diameter (under bark). Additionally, the lengths of the bottom, middle and top logs were measured as well as the height of the knots after delimbing. On average, 70% of the total tree height was used for assortments and logs were processed up to a mean top diameter of 5.3 cm under bark. The length accuracy was very high: 90% of the logs had the expected length, more than 9% had a commercially acceptable length, while only 0.7% of the logs were too long. After delimbing, the knots were of a maximum height of 2 cm. Using the Vimek 404 5T harvester in the 31-year-old pine stand was an effective solution for trunk processing and obtaining quality assortments.
机译：在早期稀疏期间获得青少酒效率的高收获效率是achallenging管理实践。其中一个困难在于实现各种各样的树干的最佳用途，并获得令人满意的木材质量。这项研究的目的是找出1）通过收割机可以处理多少树干，以产生日志，2）在日志长度精度和划线质量方面的分类质量。这项工作是在波兰北部的31岁的松树架中进行，与凯托福斯特银头的Vimek 404 5T收割机进行了早期稀疏。在收获后，在支架内设立八十个样品图。测量各树的分类总长度以及最小的顶部直径（树皮下）。另外，测量底部，中间和顶部和顶部原木的长度以及划线后结的高度。平均而言，70％的树脂总树高度用于分类，并在树皮下处理原木的平均顶部直径为5.3厘米。长度精度非常高：90％的日志的预期长度，超过9％具有商业上可接受的长度，而只有0.7％的日志太长。划线后，结的最大高度为2厘米。在31岁的松树架中使用Vimek 404 5T收割机是躯干处理和获得质量分类的有效解决方案。

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