Determining density and moisture content of the European beech (Fagus sylvatica L.) coarse woody debris from the secondary virgin forest Rajhenavski Rog

Finžgar, Domen (author), Humar, Miha (author), Kraigher, Hojka (author), Rupel, Matej (author)

Measuring density of wood samples with mercury volumemeter is a standard throughout the world. To find out the reliability of another less toxic density measuring technique, samples were measured in a mercury medium and in a water medium as well. This study is a revision of the previously published results (Finžgar et al., 2013), since the determination of decay phases was questionable and correct results are presented here. New data is also presented herewith. For water measurements, the MSA 323S scale (Sartorius, Germany) with YDK01 Density Determination Kit (Sartorius, Germany) was used for the first time in our labs. We measured density of coarse woody debris from the secondary virgin forest reserve Rajhenavski Rog, Slovenia. Results of the two methods employed were not comparable due to different density definitions. Also, lower densities in higher decay phases were not detected, although expected. Nevertheless, the scale MSA 323S proved to be a reliable method of measuring wood sample density in water. However, some optimizations will have to be considered in the future.

• Language: English
• Work type: Scientific work
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Year: 2014
• Number of pages: Str. 35-46
• Numbering: [Št.] 103
• PID: 20.500.12556/RUL-82903
• UDC: 630*11:630*53--017(497.4Rajhenavski Rog)(045)=111
• ISSN on article: 2335-3112
• COBISS.SI-ID: 3918502
• Publication date in RUL: 18.08.2016

Record is a part of a journal

• Title: Acta Silvae et Ligni
• Publisher: Gozdarski inštitut Slovenije, založba Silva Slovenica, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire, Biotehniška fakulteta, Oddelek za lesarstvo
• ISSN: 2335-3112
• COBISS.SI-ID: 266761216

Secondary language

• Language: Slovenian
• Title: Ugotavljanje gostote in vsebnosti vlage v velikih lesenih ostankih bukve (Fagus sylvatica L.) iz pragozdnega rezervata Rajhenavski Rog

Abstract

V Sloveniji in po svetu se je merjenje gostote v živosrebrnem mediju obravnavalo kot standardni postopek. Merjenje gostot v živem srebru je problematično zaradi zahtev Evropske unije po umiku te nevarne snovi iz človekovega okolja. Zato so meritve gostot v tej raziskavi potekale v različnih medijih z namenom iskanja alternativnega postopka. Ta raziskava revidira že objavljene rezultate (Finžgar in sod., 2013), saj je bila takratna določitev nekaterih stopenj razkroja vprašljiva. Prav tako so predstavljeni nekateri povsem novi rezultati. Tehtnica MSA 323S z dodatkom za merjenje gostot YDK01 (Sartorius, Nemčija) je bila v laboratoriju Gozdarskega inštituta Slovenije uporabljena prvič. Merili smo gostoto vzorcev velikih lesnih ostankov iz pragozdnega rezervata Rajhenavski Rog v vodnem in živosrebrnem mediju. Rezultati med seboj niso bili primerljivi, saj so bile uporabljene različne definicije gostote. Prav tako nismo zaznali izrazito manjših gostot v višjih stopnjah razkroja. Z našo raziskavo potrjujemo, da gostota lesa z razkrojem pada. Merilna tehtnica MSA 323S z dodatkom za merjenje gostot se je izkazala za izjemno hitro in preprosto metodo merjenja gostot lesa, čeprav bo treba v prihodnjih raziskavah postopek optimizirati.

• Keywords: Breuilov volumometer, stopnje razkroja, voda, živo srebro, Sartorius MSA 323S