scholarly journals Biomass production in mixed short rotation coppice with poplar‐hybrids ( Populus spp.) and black locust ( Robinia pseudoacacia L.)

GCB Bioenergy ◽  
2021 ◽  
Author(s):  
Jessica Rebola‐Lichtenberg ◽  
Peter Schall ◽  
Christian Ammer
Keyword(s):  
Biomass Production ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Short Rotation Coppice ◽  
Short Rotation ◽  
Robinia Pseudoacacia L ◽  
Populus Spp

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.

Effect of spacing, parental genotype and harvesting cycle on biomass production in two half-sib progenies of Robinia pseudoacacia L.

2019 ◽  
Vol 93 (4) ◽  
pp. 505-518
Author(s):  
Tatiana Stankova ◽  
Veselka Gyuleva ◽  
Kancho Kalmukov ◽  
Emil Popov ◽  
César Pérez-Cruzado ◽  
...  
Keyword(s):  
Biomass Production ◽  
Biomass Yield ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Total Yield ◽  
Woody Biomass ◽  
Parental Genotype ◽  
Site Conditions ◽  
Robinia Pseudoacacia L ◽  
Production Period

Abstract This study investigated the influence of spacing, parental genotype and harvesting cycle on woody biomass production in open-pollinated families of the locally selected black locust (Robinia pseudoacacia L.) clones ‘Tsarevets’ and ‘Srebarna’ at specific site conditions. A Nelder experiment with 16, varying along the spokes, nearly-square spacings and two black locust families arranged in alternating sectors, was established in North Central Bulgaria. Alternative harvesting options (‘harvesting cycles’), consisting of one, two or three successive coppicings, were applied and the amounts of dry shoot dendromass collected per plant were accumulated to calculate and analyse the total yield of woody biomass, achievable within 2-, 3- and 4-year periods (‘production period’). The one-coppicing cycle proved superior for both families, regardless of the length of the production period. Biomass yield in the family of ‘Srebarna’ exceeded that of ‘Tsarevets’ at the wider spacings, when 1 and 2 year-old shoots were harvested, while dendromass production of ‘Tsarevets’ was substantially higher in the 4-year-old shoots. The woody biomass yield per plant increased with spacing, and growth tended to saturation at the lowest densities, enabling derivation of optimal planting densities. The total dendromass yield per hectare was maximized at growing space of around 0.5 m2 per plant for the 2-year production period, while spacing of 1.2–2 m2 was required for production periods of 3 and 4 years. If the results from this experiment can be reliably scaled up in practice then short rotation crops of ‘Srebarna’ and ‘Tsarevets’ families at comparable site conditions should be able to produce annual biomass yields of 9–11 Mg.ha−1.year−1 within a 4-year period, given the optimal planting densities and harvesting regimes prescribed.

scholarly journals Robinia pseudoacacia L. in Short Rotation Coppice: Seed and Stump Shoot Reproduction as well as UAS-based Spreading Analysis

Forests ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 235 ◽  
Author(s):  
Christin Carl ◽  
Jan Lehmann ◽  
Dirk Landgraf ◽  
Hans Pretzsch
Keyword(s):  
Image Analysis ◽  
Seed Germination ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Light Availability ◽  
Short Rotation ◽  
Object Based ◽  
Reproduction Strategies ◽  
Root Suckering ◽  
Robinia Pseudoacacia L

Varying reproduction strategies are an important trait that tree species need in order both to survive and to spread. Black locust is able to reproduce via seeds, stump shoots, and root suckers. However, little research has been conducted on the reproduction and spreading of black locust in short rotation coppices. This research study focused on seed germination, stump shoot resprout, and spreading by root suckering of black locust in ten short rotation coppices in Germany. Seed experiments and sample plots were analyzed for the study. Spreading was detected and measured with unmanned aerial system (UAS)-based images and classification technology—object-based image analysis (OBIA). Additionally, the classification of single UAS images was tested by applying a convolutional neural network (CNN), a deep learning model. The analyses showed that seed germination increases with increasing warm-cold variety and scarification. Moreover, it was found that the number of shoots per stump decreases as shoot age increases. Furthermore, spreading increases with greater light availability and decreasing tillage. The OBIA and CNN image analysis technologies achieved 97% and 99.5% accuracy for black locust classification in UAS images. All in all, the three reproduction strategies of black locust in short rotation coppices differ with regards to initialization, intensity, and growth performance, but all play a role in the survival and spreading of black locust.

scholarly journals Propagation from root cuttings for black locust (Robinia pseudoacacia L.) improvement in Hungary: a review

2019 ◽  
Vol 25 (1-2) ◽  
Author(s):  
Zs. Keserű ◽  
K. Rédei ◽  
J. Rásó ◽  
T. Kiss
Keyword(s):  
Genetic Variation ◽  
Forest Management ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Clonal Forestry ◽  
Wood Production ◽  
The World ◽  
More Care ◽  
Improved Cultivars ◽  
Robinia Pseudoacacia L

Black locust (Robinia pseudoacacia L.) is a valuable stand-forming tree species introduced to Europe approximately 400 years ago from North America. Today it is widely planted throughout the world, first of all for wood production. In Hungary, where black locust has great importance in the forest management, it is mainly propagated by seeds. But since the seed-raised plants present a great genetic variation, this type of propagation can not be used for Robinia’s improved cultivars. In the Hungarian black locust clonal forestry, propagation from root cuttings can be used for reproduction of superior individuals or cultivars in large quantities. However, this method demands more care than raising seedlings from seeds and can be applied with success in well-equipped nurseries.

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