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Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles

Tobias Cremer
Borja Velazquez-Marti

Puni tekst: engleski, pdf (275 KB) str. 145-155 preuzimanja: 1.360* citiraj
APA 6th Edition
Cremer, T. i Velazquez-Marti, B. (2007). Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles. Croatian Journal of Forest Engineering, 28 (2), 145-155. Preuzeto s https://hrcak.srce.hr/18249
MLA 8th Edition
Cremer, Tobias i 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, vol. 28, br. 2, 2007, str. 145-155. https://hrcak.srce.hr/18249. Citirano 27.09.2021.
Chicago 17th Edition
Cremer, Tobias i 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 28, br. 2 (2007): 145-155. https://hrcak.srce.hr/18249
Harvard
Cremer, T., i Velazquez-Marti, B. (2007). 'Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles', Croatian Journal of Forest Engineering, 28(2), str. 145-155. Preuzeto s: https://hrcak.srce.hr/18249 (Datum pristupa: 27.09.2021.)
Vancouver
Cremer T, Velazquez-Marti B. Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles. Croatian Journal of Forest Engineering [Internet]. 2007 [pristupljeno 27.09.2021.];28(2):145-155. Dostupno na: https://hrcak.srce.hr/18249
IEEE
T. Cremer i B. 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, vol.28, br. 2, str. 145-155, 2007. [Online]. Dostupno na: https://hrcak.srce.hr/18249. [Citirano: 27.09.2021.]

Sažetak
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.

Ključne riječi
biomass; wood-chips; Picea abies; bark beetle

Hrčak ID: 18249

URI
https://hrcak.srce.hr/18249

Posjeta: 1.926 *