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Extractives, acidity, buffering capacity, ash and inorganic elements of black locust wood and bark of different clones and origin
Aristotle University, Greece.
Aristotle University, Greece.
Technological Educational Institute of Larissa, Greece.ORCID iD: 0000-0002-6909-2025
Aristotle University, Greece.
2008 (English)In: European Journal of Wood and Wood Products, ISSN 0018-3768, E-ISSN 1436-736X, Vol. 66, no 6, 395-400 p.Article in journal (Refereed) Published
Abstract [en]

Chemical properties of black locust wood and bark from Greece, Bulgaria and Hungary (clones NY, U and J) were investigated. Disks at breast height were taken from 25 black locust trees (five trees per origin and clone) and were divided into separate biomass components (juvenile heartwood, mature heartwood, sapwood and bark). Hot water soluble (HWSE) and dichloromethane soluble extractives (DSE), acidity (pH), buffering capacity, ash content and inorganic elements were determined according to standard laboratory techniques. Bark had the highest extractive content for both HWSE (9.25–13.49%) and DSE (3.09–4.03%). Differences of extractive contents in wood were found to exist between trees of different origin and between the three clones and ranged in heartwood between 5.04–10.10% for HWSE and 0.53–1.83% for DSE and in sapwood between 3.33–6.76% for HWSE and 0.48– 1.47% for DSE. The higher values of pH occurred in sapwood (4.92–5.35), while the differences between bark (4.44–5.12) and heartwood (4.35–4.92) were small. Acid (ABC) and base (BBC) buffering capacities from the initial to pH 10 for ABC and to pH 3 for BBC were greater in bark (ABC 0.0172–0.0219 ml/ml and BBC 0.0079– 0.0141 ml/ml) than in the other wood components (for heartwood ABC 0.0069–0.0159 ml/ml and BBC 0.0022– 0.0096 ml/ml and for sapwood ABC 0.00330.0066 ml/ml and BBC 0.00330.0049 ml/ml). The total ash content was greater in bark (7.24–8.56%) than in other biomass components (for heartwood 0.34–0.89% and for sapwood 0.72– 1.24%). The content of the main inorganic elements (Ca, K, Mg, Na, P) were also found to be much higher in bark while sapwood values were greater than heartwood.

Abstract [de]

Die chemischen Eigenschaften von Holz und Rinde von Robinien aus Griechenland, Bulgarien und Ungarn (Klone NY, U und J) wurden untersucht. Aus 25 Robinien (funf B ¨ aume pro Herkunft ¨ und Klon) wurden in Brusthohe Stammscheiben entnom- ¨ men und in die Komponenten juveniles Kernholz, adultes Kernholz, Splintholz und Rinde aufgeteilt. Anhand von Standardlaborverfahren wurden die warmwasserloslichen ¨ (HWSE) und die dichlormethanloslichen (DSE) Extrakt- ¨ stoffe, die Aciditat (pH), die Pufferkapazit ¨ at, der Aschege- ¨ halt und die anorganischen Elemente bestimmt. Die Rinde hatte den hochsten warmwasserl ¨ oslichen (9,25–13 ¨ ,49%) und den hochsten dichlormethanl ¨ oslichen (3,09–4 ¨ ,03%) Extraktstoffgehalt. Der Extraktstoffgehalt im Holz unterschied sich zwischen den Herkunften und zwischen den ¨ drei Klonen. Der HWSE schwankte im Kernholz zwischen 5,04 und 10,10%, der DSE zwischen 0,53 und 1,83%, und im Splintholz lag der HWSE zwischen 3,33 und 6,76% und der DSE zwischen 0,48 und 1,47%. Die hochsten pH-Werte wies Splintholz auf (4,92–5,35). Die ¨ Werte fur Rinde (4,44–5,12) und Kernholz (4,35–4,92) un- ¨ terschieden sich kaum. Die Pufferkapazitaten gegen ¨ uber ¨ Sauren (ABC) und Basen (BBC) im Bereich bis pH 10 ¨ (ABC) und bis pH 3 (BBC) waren in der Rinde (ABC 0,0172–0,0219ml/ml, BBC 0,0079–0,0141ml/ml) großer ¨ als in den anderen Komponenten (Kernholz ABC 0,0069– 0,0159 ml/ml, BBC 0,0022–0,0096ml/ml; Splintholz ABC 0,0033–0,0066ml/ml, BBC 0,0033–0,0049ml/ml). Der Gesamtaschegehalt war in der Rinde (7,24–8,56%) großer ¨ als im Holz (Kernholz 0,34–0,89%, Splintholz 0,72– 1,24%). Der Gehalt der wichtigsten anorganischen Elemente (Ca, K, Mg, Na, P) war in der Rinde am hochsten und ¨ im Splintholz hoher als im Kernholz.

Place, publisher, year, edition, pages
Springer, 2008. Vol. 66, no 6, 395-400 p.
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
URN: urn:nbn:se:lnu:diva-42407DOI: 10.1007/s00107-008-0254-4OAI: oai:DiVA.org:lnu-42407DiVA: diva2:805474
Available from: 2015-04-15 Created: 2015-04-15 Last updated: 2017-01-13Bibliographically approved

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