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 Effects of initial spacing on the stand structure and yield of young black locust (Robinia pseudoacacia L.) stands

2009 ◽  
Vol 15 (3) ◽  
Author(s):  
K. Rédei
Keyword(s):  
Tree Species ◽  
Early Phase ◽  
Stand Structure ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Wood Quality ◽  
Optimal Exploitation ◽  
Initial Spacing ◽  
Robinia Pseudoacacia L ◽  
The Right

The choice of the right initial spacing of stands is one of the most decisive operations of a successful afforestation. It is even more important in the case of fast growing tree species grown in plantations; it is expressed in their early phase of development and in wood quality. The results of a 5-year long experiment with four treatments will be presented in this paper. They proved the priority of an initial spacing of 1.61.0 m in the majority of quality This treatment has been proved optimal exploitation of growing space by the young trees.

scholarly journals Impact of Tree Age and Size on Selected Properties of Black Locust (Robinia pseudoacacia L.) Wood

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 634
Author(s):  
Szymon Bijak ◽  
Hubert Lachowicz
Keyword(s):  
Compression Strength ◽  
Tree Species ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Basic Density ◽  
Ring Width ◽  
Tree Age ◽  
Dry Density ◽  
Robinia Pseudoacacia L ◽  
The Impact

Black locust (Robinia pseudoacacia L.) is a non-native tree species that occupies a remarkable area in the forests of western Poland. It is mainly cultivated for the bee-keeping purposes as well as for its high quality wood. We investigated the impact of tree age and diameter on the selected structural, physical and mechanical attributes of wood of black locust that grows in conditions of mesic oligotrophic site. We analysed 200 samples originating from 18 trees that varied with age (38, 60 and 71 years old) and diameter (thin, medium and thick specimen selected according to Hartig’s method). Individual wood properties were determined along with corresponding European or Polish standards. Structural and mechanical attributes were determined for moisture of 12%. We found significant impact of tree age on tree-ring width, latewood proportion, density, oven-dry density, basic density, share of woody substance, porosity, as well as radial, tangential, longitudinal and volumetric shrinkage, compression strength parallel to grain, static bending, coefficient of compression strength parallel to grain and coefficient of static bending. The older the trees, the higher values of individual attributes were observed. In turn, the effect of tree diameter was less profound and no significant impact of that feature was found for latewood proportion, anisotropy and almost all of the shrinkage parameters. Thin trees exhibited the lowest values of the analysed parameters, while medium ones—the highest. In general, the highest technical quality of the investigated wood can be found in the youngest trees, whose wood characterises with the properties significantly exceeding native Polish tree species such as oak or beech.

scholarly journals Influence of Regeneration Method on the Yield and Stem Quality of Black Locust (Robinia pseudoacacia L.) Stands: a Case Study

2012 ◽  
Vol 8 (1) ◽  
pp. 103-112 ◽  
Author(s):  
Károly Rédei ◽  
Imre Csiha ◽  
Zsolt Keserű ◽  
János Gál
Keyword(s):  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Forest Tree ◽  
Wood Production ◽  
Stem Quality ◽  
Medium Quality ◽  
Robinia Pseudoacacia L ◽  
Root Suckers

Abstract - Black locust (Robinia pseudoacacia L.) is one of the most important forest tree species in Hungary, covering approximately 23% of the forested land and providing 25% of the annual timber output of the country. One third of these black locust stands are high forests (planted with seedlings) and the remainder coppices. According to the forestry regulations black locust stands can be regenerated both by root suckers and with seedlings in Hungary. This study investigates the influence of different regeneration methods on wood production, stem quality and health. Properly managed regeneration from root suckers produced a higher yield than regeneration from seedlings at a harvest age of 35-37 years. The results show that regeneration of black locust stands from root suckers can be recommended on good and medium quality sites without a decrease in yield or stem quality.

scholarly journals The Effects of Thinnings on Yield and Value Changes in Black Locust (Robinia pseudoacacia L.) Stands: A case study

2019 ◽  
Vol 15 (1) ◽  
pp. 47-52
Author(s):  
Károly Rédei ◽  
Zsolt Keserű ◽  
János Rásó ◽  
János Gál
Keyword(s):  
Tree Species ◽  
Quality Index ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Total Production ◽  
Stem Quality ◽  
Effect On Yield ◽  
Robinia Pseudoacacia L ◽  
Value Changes

Abstract Thinning experiments in black locust (Robinia pseudoacacia L.) stands have been conducted in Hungary for many years. Black locust is an economically important tree species supplying the domestic timber industry. This paper evaluates two effects of thinnings: the effect on yield and the effect on stand value. The case study has proved thinnings in black locust stands do not increase periodic total production, but do increase the stem-quality index by 11–24%.

scholarly journals A simplified method for application of natural regeneration in black locust (Robinia pseudoacacia L.) stands in Hungary

2021 ◽  
Vol 67 (No. 2) ◽  
pp. 66-70
Author(s):  
Veronika Honfy ◽  
Tamás Ábri ◽  
Lajos Juhász ◽  
János Rásó ◽  
Zsolt Keserű ◽  
...  
Keyword(s):  
Natural Regeneration ◽  
Stand Structure ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Forest Tree ◽  
Auxiliary Table ◽  
Medium Quality ◽  
Yield Table ◽  
Robinia Pseudoacacia L ◽  
Root Suckers

Black locust (Robinia pseudoacacia L.) is one of the most important forest tree species in Hungary, covering approximately 24% of the forest land and providing 25% of the annual timber supply. One third of these black locust stands are high forests (planted with seedlings) and the remaining stands are coppices. An auxiliary table was developed for planning the black locust natural regeneration in order to determine the sprouting criteria based on stand volume at the final cutting age. Twenty forest subcompartments were selected for investigating the possibility of black locust regeneration by root suckers. The basic yield and stand structure factors were determined using the numerical yield table for black locust stands. The results show that the regeneration of black locust stands from root suckers can be recommended on good and medium quality sites without a decrease in yield or stem quality. Black locust stands of good and medium quality (yield classes I, II, III and IV) may be regenerated from suckers in general until their growing stock attains and if their health is adequate. The simplicity of the practice-oriented auxiliary table based on the black locust yield table may further the development of management and wood utilization of the species.

scholarly journals Mortality of Different Populus Genotypes in Recently Established Mixed Short Rotation Coppice with Robinia pseudoacacia L.

Forests ◽  
2019 ◽  
Vol 10 (5) ◽  
pp. 410 ◽  
Author(s):  
Jessica Rebola-Lichtenberg ◽  
Peter Schall ◽  
Peter Annighöfer ◽  
Christian Ammer ◽  
Ludger Leinemann ◽  
...  
Keyword(s):  
Tree Species ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Mortality Rates ◽  
Short Rotation Coppice ◽  
Mixed Stands ◽  
Fast Growing ◽  
Short Rotation ◽  
Robinia Pseudoacacia L ◽  
Biomass For Energy

Short rotation coppices play an increasing role in providing wooden biomass for energy. Mixing fast-growing tree species in short rotation coppices may result in complementary effects and increased yield. The aim of this study was to analyze the effect on mortality of eight different poplar genotypes (Populus sp.) in mixed short rotation coppices with three different provenances of the N-fixing tree species black locust (Robinia pseudoacacia L.). Pure and mixed stands were established at two sites of contrasting fertility. Survival of poplar was assessed for each tree two times a year, for a period of three years. In the first two years, high variation in mortality was observed between the genotypes, but no significant differences between pure and mixed stands were identified. However, three years after planting, higher mortality rates were observed in the mixtures across all poplar genotypes in comparison to pure stands. The expected advantage on growth of combining an N-fixing tree with an N-demanding tree species, such as poplar, was overshadowed by the Robinia’s dominance and competitiveness.

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.

Black locust (Robinia pseudoacacia L.) as a multi-purpose tree species in Hungary and Romania: a review

2018 ◽  
Vol 29 (6) ◽  
pp. 1449-1463 ◽  
Author(s):  
Valeriu-Norocel Nicolescu ◽  
Cornelia Hernea ◽  
Beatrix Bakti ◽  
Zsolt Keserű ◽  
Borbála Antal ◽  
...  
Keyword(s):  
Tree Species ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Robinia Pseudoacacia L

scholarly journals Trees, seeds and seedlings analyses in the process of obtaining a quality planting material for black locust (Robinia pseudoacacia L.)

2020 ◽  
Vol 12 (4) ◽  
pp. 940-958
Author(s):  
Andrea M. ROMAN ◽  
Irina M. MORAR ◽  
Alina M. TRUȚA ◽  
Cătălina DAN ◽  
Adriana F. SESTRAȘ ◽  
...  
Keyword(s):  
Black Locust ◽  
Growth Traits ◽  
Seedling Emergence ◽  
Robinia Pseudoacacia ◽  
Basal Area ◽  
Tree Height ◽  
Forest Tree ◽  
Planting Material ◽  
Field Coefficient ◽  
Robinia Pseudoacacia L

Black locust (Robinia pseudoacacia L.) was among the first North-American tree species imported in Europe. In Romania, black locust has established itself as a forest tree appreciated for multiple uses. The objective of the hereby study was to identify a quality planting material at black locust using seeds from trees with superior traits from five stands geographically close, located in North-western of Romania. An empirical selection was done, thus trees with the most favourable traits were selected as plus trees. Among the averages of the main traits (tree height, diameter at breast height, basal area, self pruning trunk length, crown diameter) of the plus trees from the five stands, there were registered significant differences, and two stands stood out with a high biomass growth. Even if the stands had different ages (between 20-35 year), the age did not influence significantly the growth traits of the trees. The seeds of the plus trees (open-pollinated) from all the stands had large size (mean seed weight of 0.057 g/seed). The seedling emergence rate was high, especially in the solarium condition (between 52.7-73.7% compared with 33.0-41.3% in the field). Coefficient of genetic correlation and heritability calculated for the seedlings belongings to half-sib families highlighted that black locust breeding can be extremely effective by a proper selection.

Productivity and Environmental Role of Forest Shelterbelts of Robinia pseudoacacia L. of the Kuban Lowland

2020 ◽  
pp. 88-97
Author(s):  
V.V. Tanyukevich ◽  
◽  
S.V. Tyurin ◽  
D.V. Khmeleva ◽  
A.A. Kvasha ◽  
...  
Keyword(s):  
Agricultural Land ◽  
Land Reclamation ◽  
Poa Pratensis ◽  
Robinia Pseudoacacia ◽  
Average Height ◽  
Middle Aged ◽  
Aboveground Phytomass ◽  
Robinia Pseudoacacia L ◽  
Young Growth

Works on protective afforestation are carried out in order to protect agricultural land from degradation processes, as well as to improve the microclimate of land. The research purpose is to study the bioproductivity and environmental role of Robinia pseudoacacia L. forest shelterbelts in the conditions of the Kuban lowland. The approved and generally accepted methods of forest valuation, forest land reclamation, botany, and mathematical statistics were applied. Plantings were created according to the standard technology for the steppe zone of the Russian Federation. The area of forest shelterbelts is 62.4 ths ha, including 5 % of the young growth (I state class), 80 % of middle-aged forest plantings (II state class), 10 % of maturing plantings (II state class), 5 % of mature and overmature plantings (III state class). Living ground cover is formed by the following species: Koeleria pyramidata L., Poa pratensis L., Festuca pratensis H., Elytrígia repens L., Dactylis glomerata L., and Phlum pratense L. Aboveground phytomass is 100–300 g/m2; height is 25–32 cm. Plantings are characterized by the quality classes: young growth – I and II; middle-aged and maturing – III; mature and overmature – IV. At the age of natural maturity (70 years), the Robinia trunk reaches the average height of 15.1 m with the average diameter of 22.1 cm. The total stock of wood reaches 18, (ths m3), including (ths m3): young growth – 68 (ths m3); middleaged plantings – 14,871 (ths m3); maturing plantings – 2,187 (ths m3); mature and overmature plantings – 1,314 (ths m3). Aboveground phytomass in young growth is 20.2 t/ha; in mature and overmature plantings it is 391.2 t/ha. In the region it is estimated at 17,070 ths t, including (ths t): young growth – 64; middle-aged plantings – 13,753; maturing plantings – 2,032; mature and overmature plantings – 1,221. The share of stem mass reaches 84.5–80.8 %; woody greenery – 4.2–1.5 %; branches – 11.3–17.7 %. Recalculation coefficients of the stock into aboveground phytomass are the following for: young growth – 0.936; mature and overmature forest shelterbelts – 0.929. Phytosaturation of forest shelterbelts varies within 0.314–2.474 kg/m3. Forest shelterbelts have accumulated 8,534 ths t of carbon, which is estimated at 145.1 mln dollars. The sphere of application of the research results is the Krasnodar Krai forestry, which is recommended to create an additional 60 ths ha of forest shelterbelts, which will provide a normative protective forest cover of arable land of 5 % and annual carbon sequestration up to 3.4 t/ha.

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