RT Journal Article
T1 Effect of spacing, parental genotype and harvesting cycle on biomass production in two half-sib progenies of Robinia pseudoacacia L.
A1 Stankova, Tatiana
A1 Gyuleva, Veselka
A1 Kalmukov, Kancho
A1 Popov, Emil
A1 Pérez Cruzado, César
A1 Glushkova, María
A1 Dimitrov, Dimitar N.
A1 Dimitrova, Proletka
A1 Hristova, Hristina
A1 Andonova, Ekaterina
AB 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 4year-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 0.5m2 per plant for the 2-year production period, while spacing of 1.2–2m2 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.
PB Oxford Academic
YR 2020
FD 2020-07
LK https://hdl.handle.net/10347/41096
UL https://hdl.handle.net/10347/41096
LA eng
NO Stankova, T., Gyuleva, V., Kalmukov, K., Popov,E., Pérez Cruzado, C., Glushkova, M., Dimitrov, D.N., Dimitrova, P., Hristova, H., Andonova, E. (2020). Effect of spacing, parental genotype and harvesting cycle on biomass production in two half-sib progenies of Robinia pseudoacacia L. Forestry: an international journal of forest research, 93(4), 505–518, https://doi.org/10.1093/forestry/cpz039
NO This is the author’s version of the work. The definitive version was published in Forestry: an international journal of forest research, vol. 93, no. 4 (2020), available online at: https://doi.org/10.1093/forestry/cpz039
NO This work was supported by the Bulgarian National Science Fund [DN06/3, 2016, DFNI-E01/6, 2012]
DS Minerva
RD 24 abr 2026