Effect of prior tree marking, thinning method and topping diameter on harvester performance in a first thinning operation – a field experiment
The effect of harvester operator tree selection or prior tree marking in thinning operations on satisfactory results and performance has been widely discussed. In harvester operator tree selection, the machine operator decides on the fly which trees are selected to remain or cut. The objective of th...
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| Format: | Article |
| Language: | English |
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Finnish Society of Forest Science
2019-09-01
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| Series: | Silva Fennica |
| Subjects: |
| _version_ | 1818965302988242944 |
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| author | Franz Holzleitner Magdalena Langmaier Eduard Hochbichler Bernhardt Obermayer Karl Stampfer Christian Kanzian |
| author_facet | Franz Holzleitner Magdalena Langmaier Eduard Hochbichler Bernhardt Obermayer Karl Stampfer Christian Kanzian |
| author_sort | Franz Holzleitner |
| collection | DOAJ |
| description | The effect of harvester operator tree selection or prior tree marking in thinning operations on satisfactory results and performance has been widely discussed. In harvester operator tree selection, the machine operator decides on the fly which trees are selected to remain or cut. The objective of the study was to analyze the effect of prior tree marking, thinning method and topping diameter on harvester performance in low-diameter thinning operations. The entire thinning operation was captured using video technology. Overall, 2.36 ha divided into 48 plots with 5202 trees were thinned with an average diameter at breast height (dbh) over bark for all plots of between 12.5 and 14.7 cm. In total, 3122 trees were harvested, resulting in 60% removal of stem number over all plots. The harvester achieved a mean productivity of 7.38 m3 PMH0–1 with 1.48 m3 PMH0–1 SEM, with stem volume having the major influence on harvesting productivity. Prior tree marking, topping and thinning method did not significantly affect productivity. Without prior tree marking by the foresters, harvesting removal was shifted toward lower diameters. Within the unmarked plots, 7.0% of the residual trees were damaged compared with 3.2% in marked plots. |
| first_indexed | 2024-12-20T13:14:51Z |
| format | Article |
| id | doaj.art-40fb98f40f3c40b7a5bb09082cbd9736 |
| institution | Directory Open Access Journal |
| issn | 2242-4075 2242-4075 |
| language | English |
| last_indexed | 2024-12-20T13:14:51Z |
| publishDate | 2019-09-01 |
| publisher | Finnish Society of Forest Science |
| record_format | Article |
| series | Silva Fennica |
| spelling | doaj.art-40fb98f40f3c40b7a5bb09082cbd97362022-12-21T19:39:35ZengFinnish Society of Forest ScienceSilva Fennica2242-40752242-40752019-09-0153310.14214/sf.10178Effect of prior tree marking, thinning method and topping diameter on harvester performance in a first thinning operation – a field experimentFranz Holzleitner0Magdalena Langmaier1Eduard Hochbichler2Bernhardt Obermayer3Karl Stampfer4Christian Kanzian5University of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, Institute of Forest Engineering, Peter-Jordan-Straße 82/3, A-1190 Vienna, AustriaUniversity of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, Institute of Silviculture, Peter-Jordan-Straße 82/3, A-1190 Vienna, Austria; Austrian Research Centre for Forests, Department of Forest Growth and Silviculture, Seckendorff Gudent Weg 8, A-1130 Vienna, AustriaUniversity of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, Institute of Silviculture, Peter-Jordan-Straße 82/3, A-1190 Vienna, AustriaUniversity of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, Institute of Forest Engineering, Peter-Jordan-Straße 82/3, A-1190 Vienna, Austria; Agricultural Technical School of Pyhra, Kyrnbergstraße 4, A-3143 Pyhra, AustriaUniversity of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, Institute of Forest Engineering, Peter-Jordan-Straße 82/3, A-1190 Vienna, AustriaUniversity of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, Institute of Forest Engineering, Peter-Jordan-Straße 82/3, A-1190 Vienna, AustriaThe effect of harvester operator tree selection or prior tree marking in thinning operations on satisfactory results and performance has been widely discussed. In harvester operator tree selection, the machine operator decides on the fly which trees are selected to remain or cut. The objective of the study was to analyze the effect of prior tree marking, thinning method and topping diameter on harvester performance in low-diameter thinning operations. The entire thinning operation was captured using video technology. Overall, 2.36 ha divided into 48 plots with 5202 trees were thinned with an average diameter at breast height (dbh) over bark for all plots of between 12.5 and 14.7 cm. In total, 3122 trees were harvested, resulting in 60% removal of stem number over all plots. The harvester achieved a mean productivity of 7.38 m3 PMH0–1 with 1.48 m3 PMH0–1 SEM, with stem volume having the major influence on harvesting productivity. Prior tree marking, topping and thinning method did not significantly affect productivity. Without prior tree marking by the foresters, harvesting removal was shifted toward lower diameters. Within the unmarked plots, 7.0% of the residual trees were damaged compared with 3.2% in marked plots.harvesterprior tree markingproductivitythinning methodtime studytopping diametervideo analysis |
| spellingShingle | Franz Holzleitner Magdalena Langmaier Eduard Hochbichler Bernhardt Obermayer Karl Stampfer Christian Kanzian Effect of prior tree marking, thinning method and topping diameter on harvester performance in a first thinning operation – a field experiment Silva Fennica harvester prior tree marking productivity thinning method time study topping diameter video analysis |
| title | Effect of prior tree marking, thinning method and topping diameter on harvester performance in a first thinning operation – a field experiment |
| title_full | Effect of prior tree marking, thinning method and topping diameter on harvester performance in a first thinning operation – a field experiment |
| title_fullStr | Effect of prior tree marking, thinning method and topping diameter on harvester performance in a first thinning operation – a field experiment |
| title_full_unstemmed | Effect of prior tree marking, thinning method and topping diameter on harvester performance in a first thinning operation – a field experiment |
| title_short | Effect of prior tree marking, thinning method and topping diameter on harvester performance in a first thinning operation – a field experiment |
| title_sort | effect of prior tree marking thinning method and topping diameter on harvester performance in a first thinning operation a field experiment |
| topic | harvester prior tree marking productivity thinning method time study topping diameter video analysis |
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