Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles
For sanitary reasons, spruce trees affected by bark beetles (Ips typographus L.) should be re¬moved out of the stand as soon as possible, to avoid the propagation of the beetles to healthy trees. One possibility, to utilize the accruing crown material in a reasonable way (instead of burning it) coul...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Zagreb, Faculty of Forestry
2007-01-01
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| Series: | Croatian Journal of Forest Engineering |
| Online Access: | https://hrcak.srce.hr/file/28458 |
| _version_ | 1828396184593498112 |
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| author | Tobias Cremer Borja Velazquez-Marti |
| author_facet | Tobias Cremer Borja Velazquez-Marti |
| author_sort | Tobias Cremer |
| collection | DOAJ |
| description | For sanitary reasons, spruce trees affected by bark beetles (Ips typographus L.) should be re¬moved out of the stand as soon as possible, to avoid the propagation of the beetles to healthy trees. One possibility, to utilize the accruing crown material in a reasonable way (instead of burning it) could be, to use it as wood-chips for biomass heating plants. The aim of this project was therefore to determine the productivity of two harvesting and processing systems for wood-chips as a joint-product of round wood in Norway spruce (Picea abies L.) forests affected by bark beetles. Two systems with different sorting criteria were studied: processing of sawlogs, pulpwood and wood-chips (System A) in comparison to the process¬ing of only sawlogs and wood-chips (System B). In System A, the energy wood was chipped with a chipper mounted on a forwarder that was working directly in the stand. In System B, the material to be chipped was previously concentrated along the forest road with a forwarder, and a chipper mounted on a truck was used for chipping.
In System A, 0.18 t of dried chips could be harvested per m3 of round wood, and in System B
0.26 t of dried chips per m3 of round wood. The cost of chipping in the stand was 4.74 ./m3 of chips and the cost of chipping along the forest road after transporting the chipping material by a forwarder was 5.63 ./m3 of chips. Therewith, a cost-covering supply of wood-chips may be obtained out of such stands. Concerning the ratio of energy input to energy output it can be said that the systems required 1.5% and 2% of energy output that was obtained using the respective system. |
| first_indexed | 2024-12-10T08:26:02Z |
| format | Article |
| id | doaj.art-aa38a3c85f764db2b7d8902a5a373789 |
| institution | Directory Open Access Journal |
| issn | 1845-5719 1848-9672 |
| language | English |
| last_indexed | 2024-12-10T08:26:02Z |
| publishDate | 2007-01-01 |
| publisher | University of Zagreb, Faculty of Forestry |
| record_format | Article |
| series | Croatian Journal of Forest Engineering |
| spelling | doaj.art-aa38a3c85f764db2b7d8902a5a3737892022-12-22T01:56:13ZengUniversity of Zagreb, Faculty of ForestryCroatian Journal of Forest Engineering1845-57191848-96722007-01-0128214515518249Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetlesTobias CremerBorja Velazquez-MartiFor sanitary reasons, spruce trees affected by bark beetles (Ips typographus L.) should be re¬moved out of the stand as soon as possible, to avoid the propagation of the beetles to healthy trees. One possibility, to utilize the accruing crown material in a reasonable way (instead of burning it) could be, to use it as wood-chips for biomass heating plants. The aim of this project was therefore to determine the productivity of two harvesting and processing systems for wood-chips as a joint-product of round wood in Norway spruce (Picea abies L.) forests affected by bark beetles. Two systems with different sorting criteria were studied: processing of sawlogs, pulpwood and wood-chips (System A) in comparison to the process¬ing of only sawlogs and wood-chips (System B). In System A, the energy wood was chipped with a chipper mounted on a forwarder that was working directly in the stand. In System B, the material to be chipped was previously concentrated along the forest road with a forwarder, and a chipper mounted on a truck was used for chipping. In System A, 0.18 t of dried chips could be harvested per m3 of round wood, and in System B 0.26 t of dried chips per m3 of round wood. The cost of chipping in the stand was 4.74 ./m3 of chips and the cost of chipping along the forest road after transporting the chipping material by a forwarder was 5.63 ./m3 of chips. Therewith, a cost-covering supply of wood-chips may be obtained out of such stands. Concerning the ratio of energy input to energy output it can be said that the systems required 1.5% and 2% of energy output that was obtained using the respective system.https://hrcak.srce.hr/file/28458 |
| spellingShingle | Tobias Cremer Borja Velazquez-Marti Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles Croatian Journal of Forest Engineering |
| title | Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles |
| title_full | Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles |
| title_fullStr | Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles |
| title_full_unstemmed | Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles |
| title_short | Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles |
| title_sort | evaluation of two harvesting systems for the supply of wood chips in norway spruce forests affected by bark beetles |
| url | https://hrcak.srce.hr/file/28458 |
| work_keys_str_mv | AT tobiascremer evaluationoftwoharvestingsystemsforthesupplyofwoodchipsinnorwayspruceforestsaffectedbybarkbeetles AT borjavelazquezmarti evaluationoftwoharvestingsystemsforthesupplyofwoodchipsinnorwayspruceforestsaffectedbybarkbeetles |