Naslov
Bark Beetles Influence on Wood Quality Determination of Silver Fir and Norway Spruce According to the HRN EN Standard

Autori
Ursić, Branko ; Vusić, Dinko ; Lovrinčević, Mihael ; Papa, Ivica ; Franjević, Milivoj ; Đuka, Andreja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Fir and pine management in a changeable environment: risk and opportunities / Bončina, Andrej ; Fonseca, Teresa F. ; Ballian, Dalibor - Sarajevo : Šumarski fakultet, Univerzitet u Sarajevu, 2022, 11-11

ISBN
978-9958-616-59-4

Skup
International IUFRO Conference Abies & Pinus 2022. "Fir and pine management in changeable environment: risks and opportunities"

Mjesto i datum
Sarajevo, Bosna i Hercegovina, 19.09.2022. - 22.09.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
assortment structure, bark beetle, selective forests

Sažetak
Roundwood scaling requires measuring dimensions and determining a wood quality class. That can be done at the different time intervals from tree cutting, in which some wood faults can appear, for example fissures and insect attack, etc. This research aims to determine how insect attacks can influence the determination of the wood quality class regarding the fact that the roundwood scaling was done in different time intervals from cutting. The research was conducted in the summer period of 2021 during selection cutting of Silver fir (Abies alba Mill.) and Norway spruce (Picea abies (L.) Karst.) trees. In that period, ambrosia beetles (Pityokteines sp.) were not determined and insect attacks on Silver fir were not found. The buck-to-quality method was applied, and the roundwood scaling was done according to the European HRN EN 1927-1 standard. Data collecting (diameter, length, quality class, wood faults, and insect presence) was done by a newly designed computer module. According to the standard, damages caused by insects are not allowed in the first (A) and the second (B) quality class. The damage caused by bark beetles (< 2 mm) i. e. Ips typographus (L ; ), are only in the bark without decreasing log's utilization, so they were not considered in the initial quality class determination, but they were recorded. Data analysis and quality class modification with damage from insect attacks (< 2 mm), resulted in a reduction of A class assortments by 1.2% and B class assortments by 3.1% increasing the share of C class assortments by 4.4%. Based on the research results the modification of the classification standard should be considered in order to more clearly define the type and the intensity of the insect attack not permitted in the higher quality classes.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo, Biotehnologija

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