Stand structure and yield of the mixed white poplar and black locust plantations on sandy ridges between the Danube and Tisza rivers in Hungary

2002 ◽  
Vol 13 (2) ◽  
pp. 103-106 ◽  
Author(s):  
Károly Rédei
Keyword(s):  
Stand Structure ◽  
Black Locust ◽  
White Poplar

scholarly journals Black locust stand structure on the sterile dump in the middle basin of Jiu River (Romania)

REFORESTA ◽  
2020 ◽  
Author(s):  
Cornelia BUZATU-GOANȚĂ (née) HERNEA ◽  
◽  
Mihaela Corneanu ◽  
Constantin Nețoiu ◽  
Andrei Buzatu ◽  
...  
Keyword(s):  
Stand Structure ◽  
Black Locust

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 Combined Multi-assay Evaluation of the Antioxidant Properties of Tree Bark

2019 ◽  
Vol 15 (2) ◽  
pp. 85-97 ◽  
Author(s):  
Esztella Tálos-Nebehaj ◽  
Levente Albert ◽  
Eszter Visi-Rajczi ◽  
Tamás Hofmann
Keyword(s):  
Black Locust ◽  
Antioxidant Properties ◽  
Tree Bark ◽  
White Poplar ◽  
Wild Cherry ◽  
European Larch ◽  
Outer Bark ◽  
Abts Assay ◽  
Sweet Chestnut ◽  
Black Poplar

Abstract Wood logging generates considerable amounts of bark by-product, which are a potential antioxidant source well worth extracting and using. The present work compares the antioxidant properties of the bark of the following selected Hungarian forest tree species: white poplar (Populus alba L.), black locust (Robinia pseudoacacia L.), sessile oak (Quercus petraea Liebl.), black poplar (Populus nigra L.), silver birch (Betula pendula Roth), European larch (Larix decidua Mill.), scots pine (Pinus sylvestris L.), wild cherry (Prunus avium L.), European hornbeam (Carpinus betulus L.) and sweet chestnut (Castanea sativa Mill.). Inner and outer bark were investigated separately. Total polyphenol content (TPC) was determined by the Folin-Ciocâlteu method, whereas antioxidant capacity was assayed using the ferric reducing ability of plasma (FRAP), 2.2-diphenyl-1-picrylhydrazyl (DPPH), and ABTS (2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)) methods. The overall antioxidant power of the samples was evaluated using a scoring system that combined the FRAP, DPPH, and ABTS assay results. The TPC levels did not always follow the FRAP, DPPH, and ABTS assay values. Differing reaction mechanisms and sample compositions are possible reasons for this. The presented scoring evaluation was suitable for the assessment and comparison of complex antioxidant properties of tree bark samples. According to the scores, inner bark showed higher scores compared to outer bark for most species with the exceptions of black poplar, black locust, white poplar, sweet chestnut, and European larch. The highest overall antioxidant capacities were determined in the inner bark of wild cherry and the outer bark of sweet chestnut. The species with the overall lowest scores were black locust and black poplar.

scholarly journals Diameter Structure Changes in the Pre-Maturing Black Locust and Common Hackberry Stand in the Subotica-Horgoš Sands under the Influence of a Late Thinning

2020 ◽  
Vol 11 (2) ◽  
pp. 111-126
Author(s):  
Siniša Andrašev ◽  
Martin Bobinac ◽  
Tomislav Dubravac ◽  
Nikola Šušić
Keyword(s):  
Stand Structure ◽  
Black Locust ◽  
Initial Density ◽  
Control Plot ◽  
Stand Age ◽  
Thinning Intensity ◽  
Biological Potential ◽  
Diameter Structure ◽  
Deviation Coefficient ◽  
Diameter Classes

In this paper, a change of diameter structure in a pre-maturing stand of black locust and common hackberry under the influence of a late thinning is analysed. The research is based on three permanent experimental plots and two measurements of diameters in a five-year period. One of the plots is a control plot and two plots are experimental, where the thinning was carried out in a stand 28-years old, with the thinning intensity of 28.9–30.6% of the initial density, approximately evenly distributed across diameter classes. In the investigated stand common hackberry came from the neighbouring areas in the stand structure. The initial measurement in the autumn of 2014 confirmed the share of common hackberry of 16–18% in the total number of trees thicker than 5 cm with a dominantly reversed J shape of the diameter structure and the presence of trees in all the diameter classes. In the period of stand age from 28 to 33 years, a dominant process on all treatments was the mortality of thinner trees, while the recruitment of common hackberry trees was recorded in all treatments. On the control plot, a quarter of the trees died, while an eighth of the remaining trees died in the thinned plots, mostly black locust trees. In thinned plots, only black locust trees died with a characteristic that the intensity of mortality was higher in thinner trees, while in the control plot some thick black locust trees died, as well as and some thinner common hackberry trees. In the five-year period, numerical parameters of variability (standard deviation, coefficient of variation), the shape of distributions (skewness and kurtosis) and heterogeneity of diameters at breast height (Gini index, Lorenz asymmetry coefficient) have shown a trend of increasing variability and change of diameter distributions of trees in all treatments, but it is more expressed in thinned plots compared to the control plots. Growth dominance coefficient of diameters shows that the competition between the collectives of both species and the black locust collective is of asymmetric type and more expressed in the thinning treatments. In common hackberry trees on the control plot the competition between the trees is of asymmetric type, while on the thinned plots, the competition is of symmetric type. This shows that after thinning, common hackberry has a biological potential that is higher than that of black locust and that the natural succession can be accelerated through thinnings.

Co-production of soluble sugars and lignin from short rotation white poplar and black locust crops

2020 ◽  
Vol 54 (6) ◽  
pp. 1617-1643
Author(s):  
Laura Jiménez-López ◽  
Raquel Martín-Sampedro ◽  
María E. Eugenio ◽  
José I. Santos ◽  
Hortensia Sixto ◽  
...  
Keyword(s):  
Black Locust ◽  
Soluble Sugars ◽  
White Poplar ◽  
Short Rotation

White Poplar, Black Locust by Louise Wagenknecht

2004 ◽  
Vol 105 (1) ◽  
pp. 159-160
Author(s):  
Robert E. Walls
Keyword(s):  
Black Locust ◽  
White Poplar

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.

On syntaxonomy of floodplain forests (Salicetea purpureae Moor 1958) of the Irtysh and Black Irtysh rivers

2005 ◽  
pp. 82-92
Author(s):  
G. S. Taran
Keyword(s):  
Populus Alba ◽  
Floodplain Forests ◽  
White Poplar ◽  
Salix Alba ◽  
River Floodplain ◽  
White Willow ◽  
Irtysh River

The paper characterizes poplar (Populus alba, P. nig­ra) and white willow (Salix alba) forests of the Irtysh and the Black Irtysh river floodplain, together with the silvery salt tree (Halimodendron halodendron) community of the Black Irtysh river floodplain. The Black Irtysh floodplain willow and poplar forests are separated into a new alliance, Rubio dolichophyllae—Populion albae Taran all. nov. (Salicetalia purpureae Moor 1958, Salicetea purpureae Moor 1958), which includes the associations Rubio dolichophyllae—Popu­letum albae Taran 1997 and Rubio dolichophyllae—Salicetum albae Taran ass. nov. The Halimodendron halodendron community is probably related to the class Nerio-Tamaricetea Br.-Bl. et de Bolós 1958. White poplar forests in the Irtysh R. upper reaches, described within the Semipalatinsk city limits, belong to the association Heracleo dissecti—Populetum albae Taran 1997 and its subassociation H. d. —P. a. lamietosum albi Taran 1997 (Equiseto hyemalis—Populion nigrae Taran 1997, Salicetalia purpureae Moor 1958).

Langfristige Entwicklung von zwei Waldgesellschaften im Białowieża-Urwald

2008 ◽  
Vol 159 (4) ◽  
pp. 80-90 ◽  
Author(s):  
Bogdan Brzeziecki ◽  
Feliks Eugeniusz Bernadzki
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Stand Structure ◽  
Temporal Dynamics ◽  
Structural Parameters ◽  
Forest Communities ◽  
Natural Forests ◽  
Tree Species Composition ◽  
Strong Trend ◽  
Long Term Study

The results of a long-term study on the natural forest dynamics of two forest communities on one sample plot within the Białowieża National Park in Poland are presented. The two investigated forest communities consist of the Pino-Quercetum and the Tilio-Carpinetum type with the major tree species Pinus sylvestris, Picea abies, Betula sp., Quercus robur, Tilia cordata and Carpinus betulus. The results reveal strong temporal dynamics of both forest communities since 1936 in terms of tree species composition and of general stand structure. The four major tree species Scots pine, birch, English oak and Norway spruce, which were dominant until 1936, have gradually been replaced by lime and hornbeam. At the same time, the analysis of structural parameters indicates a strong trend towards a homogenization of the vertical stand structure. Possible causes for these dynamics may be changes in sylviculture, climate change and atmospheric deposition. Based on the altered tree species composition it can be concluded that a simple ≪copying≫ (mimicking) of the processes taking place in natural forests may not guarantee the conservation of the multifunctional character of the respective forests.

Old-growth forest reserves in Slovenia: the past, present, and future

2012 ◽  
Vol 163 (6) ◽  
pp. 240-246 ◽  
Author(s):  
Thomas A. Nagel ◽  
Jurij Diaci ◽  
Dusan Rozenbergar ◽  
Tihomir Rugani ◽  
Dejan Firm
Keyword(s):  
Stand Structure ◽  
Growth Conditions ◽  
Ecosystem Functions ◽  
Future Research ◽  
Old Growth ◽  
Forest Reserves ◽  
The Past ◽  
Old Growth Forest ◽  
Forest Remnants ◽  
Basic Characteristics

Old-growth forest reserves in Slovenia: the past, present, and future Slovenia has a small number of old-growth forest remnants, as well as many forest reserves approaching old-growth conditions. In this paper, we describe some of the basic characteristics of these old-growth remnants and the history of their protection in Slovenia. We then trace the long-term development of research in these old-growth remnants, with a focus on methodological changes. We also review some of the recent findings from old-growth research in Slovenia and discuss future research needs. The conceptual understanding of how these forests work has slowly evolved, from thinking of them in terms of stable systems to more dynamic and unpredictable ones due to the influence of natural disturbances and indirect human influences. In accordance with this thinking, the methods used to study old-growth forests have changed from descriptions of stand structure to studies that address natural processes and ecosystem functions.

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