scholarly journals Machinability Research of the Most Common Invasive Tree Species in Slovenia

Forests ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 752 ◽  
Author(s):  
Miran Merhar ◽  
Dominika Gornik Bučar ◽  
Maks Merela
Keyword(s):  
Tree Species ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Visual Assessment ◽  
Horse Chestnut ◽  
Tree Of Heaven ◽  
Invasive Tree ◽  
Honey Locust ◽  
Invasive Tree Species

This article investigates the quality of the machining surface of the five most common invasive tree species in Slovenia, i.e., black locust (Robinia pseudoacacia L.), boxelder maple (Acer negundo L.), horse chestnut (Aesculus hippocastanum), honey locust (Gleditsia triacanthos) and tree of heaven (Ailanthus altissima). The machining tests were made according to the American Society for Testing and Materials (ASTM) D1666-17 standard, where the quality of the surfaces after planing, routing and turning were evaluated with visual assessment, and the area and profile roughness parameters were also determined on selected specimens. The results showed that boxelder maple, horse chestnut and honey locust can be machined very well in all the studied operations, with the best results in routing and a little less good by turning, whereas the tree of heaven had the best quality in planing, and the worst by turning. Among all studied tree species, the black locust had the worst quality in planing, but the quality at routing was very similar to other tested species. The research also showed that there is little or no significant relationship between the qualities of the various types of machining for tested tree species.

scholarly journals Wood Surface Finishing of Selected Invasive Tree Species

2020 ◽  
Vol 71 (3) ◽  
pp. 271-280
Author(s):  
Matjaž Pavlič ◽  
Jure Žigon ◽  
Marko Petrič
Keyword(s):  
Tree Species ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Surface Hardness ◽  
European Beech ◽  
Surface Finishing ◽  
Horse Chestnut ◽  
Tung Oil ◽  
Invasive Tree ◽  
Invasive Tree Species

Due to their strong renewal power, the invasive tree species are spreading rapidly, especially in abandoned agricultural and forest areas and along traffic routes and water courses. One way of their restriction is the promotion of their use. In our research, we investigated surface finishing of wood of five selected invasive species in Slovenia, Box elder (Acer negundo L.), Black locust (Robinia pseudoacacia L.), Horse-chestnut (Aesculus hippocastanum L.), Honey locust (Gleditsia triacanthos L.) and Chinese sumac (Ailanthus altissima (Mill.) Swingle), and compared it with the finishing of the European beech (Fagus sylvatica L.) wood. For coatings, we selected one-component waterborne finish on acrylate-polyurethane basis, one-component solventborne finish on polyurethane basis and tung oil as a natural finish. Several surface properties were investigated. We proved that surface hardness, resistance to impact and adhesion were very much related to interactions between the coating and the substrate, while resistance to cold liquids was only dependant on the type of the finish. It was also shown that, in general, finishing of woods of selected invasive tree species was not problematic. The only exception was Black locust wood on which tung oil cured very slowly.

scholarly journals Innovative Model of the Cost Price Calculation of Products from Invasive Non-Native Wood Species Based on the FTDABC Method

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1519
Author(s):  
Jože Kropivšek ◽  
Matej Jošt ◽  
Petra Grošelj ◽  
Manja Kitek Kuzman ◽  
Mirko Kariž ◽  
...  
Keyword(s):  
Wood Species ◽  
Tree Species ◽  
Black Locust ◽  
Wood Products ◽  
Economic Feasibility ◽  
Cost Price ◽  
Invasive Tree ◽  
Innovative Products ◽  
Invasive Tree Species ◽  
The Cost

Invasive tree species continue to spread, so in addition to strategies to limit this their use in the production of innovative products must be considered. This research aimed to develop and apply a model for calculating the cost price of invasive wood products considering the specificities of materials and production process, and is suitable for quickly assessing the economic feasibility of using the selected tree species for a given product. The TDABC method with the inclusion of fuzzy logic was used to incorporate the uncertainty of time and quality parameters. In the model, the imprecise values of these parameters are represented with triangular fuzzy numbers. Using a furniture product (dining table) made of black locust wood as an example, we demonstrated the applicability of the developed model. We found that the most probable cost price of a table made of black locust wood is comparable to the price of a product made of oak wood. In this way, we proved the potentially high economic value of invasive wood. The innovative products from invasive non-native wood species can achieve a high added value due to their visual characteristics and attractive appearance. Such use could increase interest in the (more efficient) management of invasive tree species, which would help to manage and use them efficiently. For further research, it would be useful to apply the proposed model to other invasive tree species as well as to other products.

scholarly journals Dendroflora of the Nataliivskyi Park (Kharkiv region, Ukraine): taxonomic diversity and monitoring of plantations

2021 ◽  
Vol 89-90 ◽  
pp. 3-12
Author(s):  
Alla Hryhorenko ◽  
Yurii Klymenko
Keyword(s):  
Picea Abies ◽  
Tree Species ◽  
Quercus Robur ◽  
Woody Plant ◽  
Forest Type ◽  
Robinia Pseudoacacia ◽  
Taxonomic Diversity ◽  
Taxonomic Composition ◽  
Invasive Tree ◽  
Invasive Tree Species

To develop measures for the restoration of historic plantations and landscapes of the Nataliivskyi Park (Kharkiv region, Ukraine), the investigations of taxonomic composition and distribution of woody plant taxa, as well as structure of different landscape areas, were carried out in 2018–2019. The recent studies were realized according to the same protocol applied in 1997 by Y. Klymenko, and taking into account previously published data.In 1939, the dendroflora of the Nataliivskyi Park comprised about 100 taxa. Later, the number of taxa significantly decreased, and in 1950 the park’s dendroflora comprised only about 40 taxa. In 1997 there were 74 taxa reported. Since 1997, the taxonomic composition of the park’s dendroflora has been enriched by ten taxa and is currently represented by 84 taxa. Simultaneously, the number of valuable plants in the plantations decreased (only one or two plants represent some such taxa). Due to a bark beetle attack on drought-weakened trees of Picea abies and P. pungens, most of them withered. The area of allotments with Pinus sylvestris and Quercus robur remained almost the same, which indicates their stability. The area of allotments with the domination of such naturalized introducers as Acer negundo and Robinia pseudoacacia and the area of allotments with the domination of neither taxa have increased. In the landscapes, the redistribution of the types of areas appeared. The forest type of landscape became predominant, while the meadow type of landscape has almost disappeared.Hence, to restore historical plantings and landscapes, it is necessary to re-cultivate taxa represented here during the park’s heyday and remove invasive tree species. Although cuttings in protected areas are currently prohibited, our investigations showed that they might help preserve such valuable territories as Nataliivskyi Park.

scholarly journals Drying characteristics of wood of invasive tree species growing in an urban environment

Les/Wood ◽  
2019 ◽  
Vol 68 (2) ◽  
pp. 31-43 ◽  
Author(s):  
Denis Plavčak ◽  
Željko Gorišek ◽  
Aleš Straže ◽  
Maks Merela
Keyword(s):  
Moisture Content ◽  
Wood Species ◽  
Tree Species ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Urban Environments ◽  
Drying Kinetics ◽  
Horse Chestnut ◽  
Drying Time ◽  
Kinetics Of

Non-native tree species are increasingly growing in urban environments, where they are exposed to cultivation and pruning measures, and in many cases their growth becomes uncontrolled, even invasive. In such cases the structure of the wood is more heterogeneous, with more tyloses, discolorations and decay, and higher moisture content. The drying of such wood is more demanding and cannot rely on the standard drying schedules. Therefore, the drying kinetics of the boards (thickness 22 mm, 28 mm and 46 mm) of three wood species (black locust – Robinia pseudoacacia; box elder – Acer negundo and horse chestnut – Aesculus hippocastanum) were analysed at 20 °C and 40 °C. Additionally, the drying quality was assessed by determining the moisture content gradient, drying stresses and presence of typical drying defects. In the drying tests the moisture content gradients were relatively low in all species, so no high drying stresses were generated. Due to the expected high risk of collapse, careful drying of green maple was needed, to prevent board twisting when a pronounced number of knots and greater fibre deviation occurred. Half-drying times indicated the longer drying of thicker black locust boards, and very careful drying of maple. We confirmed the usability of the half-drying time to compare the drying kinetics of different wood species and assortments.

scholarly journals Yield table for selected black locust (Robinia pseudoacacia L.) cultivars

2021 ◽  
pp. 193-198
Author(s):  
Károly Rédei ◽  
Tamás Ábri ◽  
Fruzsina Szabó ◽  
Zsolt Keserű
Keyword(s):  
Tree Species ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Basal Area ◽  
Average Height ◽  
Yield Table ◽  
Total Forest Area ◽  
Robinia Pseudoacacia L ◽  
Planted Tree

In Hungary, the black locust (Robinia pseudoacacia L.) can be considered as the most important fast-growing, stand-forming introduced tree species. Due to its positive growing technological characteristics as well as wood utilization possibilities, at the present, black locust is the most widely planted tree species in Hungary, covering 25% of the country’s total forest area. One of the important tasks ahead of Hungarian black locust growers is to improve the quality of black locust stands with introducing selected cultivars. For the estimation of the growth rate and yield a numerical yield table has been constructed on the basis of surveys of the experimental plots established in pure,managed ’Nyirségi’ ,’Üllői’ and ’Jászkiséri’ black locust cultivars’ plantations which can be suitable for sawlogs production. In the course of 56 stand surveys the key stand characteristics were measured, and then, were reconsidered the average height, diameter (DBH), volume, basal area and stem number given separately for the main (remaining), secondary (removal) and total stands per hectare. The programmable editing procedure allows to extention and formal change of information content of the yield table according to different demands.

scholarly journals Elucidating the native sources of an invasive tree species, Acacia pycnantha, reveals unexpected native range diversity and structure

2013 ◽  
Vol 111 (5) ◽  
pp. 895-904 ◽  
Author(s):  
Joice Ndlovu ◽  
David M. Richardson ◽  
John R. U. Wilson ◽  
Martin O'Leary ◽  
Johannes J. Le Roux
Keyword(s):  
Tree Species ◽  
Native Range ◽  
Invasive Tree ◽  
Invasive Tree Species
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