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Iskalni niz: "ključne besede" (ash-wood) .

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1.
Changes of ashwood pH-value during conventional drying
Aleš Straže, Sandi Torkar, Vesna Tišler, Željko Gorišek, 2003

Povzetek: Changes of pH of sawn wood during conventional drying were studied. Green ashwood boards (Fraxinus excelsior L.), 25.4 mm in thickness, were exposed to 1 month air drying and to kiln drying using 7 schedules, reached by varying temperature (20°C, 30°C and 65°C) and relative air humidity (33% to 90%). Wood samples for pH and moisture content (MC) determination were taken in successive time interval at 3 board`s depths (1/10, 1/3 and 1/2 of thickness).MC was established gravimetrically. pH-value determination of solid wood water system by suspending wood dust into distilled water was used. The lowest used temperature and duration of drying procedure had not significant influence on wood pH. Wood acidification was confirmed at higher drying temperatures (30°C and 65°C), particularly with lower drying rates and prolongation of the procedure. Among all the factors, drying temperature had the greatest impact on the pH-value of wood.
Ključne besede: ash-wood, pH-value, drying, drying conditions
DiRROS - Objavljeno: 12.07.2017; Ogledov: 2681; Prenosov: 1078
.pdf Celotno besedilo (279,40 KB)

2.
Challenges and solutions in early detection, rapid response and communication about potential invasive alien species in forests
Jana Kus Veenvliet, Simon Zidar, David Williams, Laura Verbrugge, Elena Tricarico, Jon Sweeney, Craig Shuttleworth, Nikki Robinson, Aleksander Marinšek, Márton Korda, Natalia Kirichenko, Eugenio Gervasini, Massimo Faccoli, Ágnes Csíszár, György Csóka, Erin Bullas-Appleton, Richard O'Hanlon, Maarten De Groot, 2020

Povzetek: Invasive alien species (IAS) are an important threat to forests. One of the best ways to manage potential IAS is through early detection and rapid response (EDRR) strategies. However, when dealing with IAS in forests, EU regulations are divided between phytosanitary regulations and IAS regulations. A version of EDRR for the former has been in place in the EU for more than 15 years while the latter is still in the process of being implemented. During 2019, a workshop was held to gather international experts on different plant health pests and IAS. The purpose of this workshop was to identify the opportunities and difficulties in applying the EDRR system in the EU phytosanitary and IAS legislation to four species for providing suggestions to improve the EDRR system. The model species are well known and come from different trophic levels. These species were the American pokeweed (Phytolacca americana), the grey squirrel (Sciurus carolinensis); and the plant health pests Geosmithia morbida and Emerald ash borer (Agrilus planipennis). We identified the similarities in the challenges of early detection, rapid response and communication of these species. For all species, difficulties in species identification, knowledge gaps on the pathways of spread, a lack of resources and uncertainty over which national government service was the competent authority were identified as the main challenges. Other challenges like public perception for the grey squirrel or methodological problems were species-specific. Regarding the rapid response: public perception, determination of the eradication area, sufficient scientific capacity and the lack of resources were common challenges for all species. Therefore, collaboration between institutes dealing with plant health pests and IAS can lead to better control of both groups of unwanted %organisms in forests.
Ključne besede: early warning system, plant health legislation, EU IAS legislation, alien species, Geosmithia morbida, Emerald ash borer, American pokeweed, Grey squirrel, rapid response system
DiRROS - Objavljeno: 11.12.2020; Ogledov: 832; Prenosov: 284
URL Celotno besedilo (0,00 KB)

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