Original scientific paper
Impact of the forest fires on the black pine tree bark chemical composition (Pinus nigra Arn.)
Alan Antonović
orcid.org/0000-0002-5579-0930
; Fakultet šumarstva i drvne tehnologije Sveučilišta u Zagrebu, Zavod za tehnologije materijala, Zagreb, Hrvatska
Damir Barčić
; Fakultet šumarstva i drvne tehnologije Sveučilišta u Zagrebu, Zavod za ekologiju i uzgajanje šuma, Zagreb, Hrvatska
Josip Ištvanić
; Fakultet šumarstva i drvne tehnologije Sveučilišta u Zagrebu, Zavod za tehnologije materijala, Zagreb, Hrvatska
Matija Lozančić
; Fakultet šumarstva i drvne tehnologije Sveučilišta u Zagrebu, Zavod za tehnologije materijala, Zagreb, Hrvatska
Abstract
Forest fires are uncontrolled fires in forests, causing great damage, which depends on the age of the forest, tree/vegetation species, as well as the type of fire and its intensity, that are less commonly caused by natural causes, and most often by human activity. Since significant quantities of burnt trees remain in these areas after the fire, the question arises to what extent they are chemically degraded, or whether they still have all the properties for further use in mechanical or chemical wood processing. Therefore, in this paper, the influence of forest fires on the group chemical composition of black pine bark (Pinus nigra Arn.) was researched. The research was conducted by determining the group chemical composition (accessory substances, minerals, cellulose, wood polyose and lignin) of burnt and unburnt black pine wood bark (in comparison with burnt bark) by sampling rings at tree heights of 0 m, 2 m and 4 m. Based on the obtained chemical analyses results of the burnt black pine wood bark, the influence of forest fires on the change of the chemical composition was determined in comparison with the chemical composition of the unburnt black pine wood bark. The obtained results showed a significant difference in the reduced content of ash and wood polyose (hemicellulose) and the increased content of cellulose and lignin between unburnt and burnt wood bark. Furthermore, in the same comparison, we did not notice significant differences in the content of accessory substances.
Keywords
black pine (Pinus nigra Arn.); forest fires; fire height; bark; group chemical composition of wood
Hrčak ID:
272999
URI
Publication date:
31.12.2021.
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