Harvester efficiency in trunk utilisation and log quality of early thinning pine trees
| Autor: | Z. Karaszewski, Piotr S. Mederski, Konrad Werk, Mariusz Brunka, Mariusz Bembenek, Kwiryn Naparty |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
quality of delimbing Thinning Tree trunk General. Including nature conservation geographical distribution 04 agricultural and veterinary sciences QH1-199.5 01 natural sciences Trunk 040501 horticulture Effective solution Tree (data structure) bucking accuracy Plant science Bark (sound) Statistics vimek 404 t5 QH1-278.5 0405 other agricultural sciences Natural history (General) 010606 plant biology & botany Mathematics pinus sylvestris l |
| Zdroj: | Forest Research Papers, Vol 80, Iss 1, Pp 45-53 (2019) |
| DOI: | 10.48538/frp-2019-0004 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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