Impact of Plant Growth Regulators to Development of the Second Generation Energy Crop Miscanthus × giganteus Produced Two Years in Marginal Post-Military Soil

Abstract

The impact of the plant growth regulators (PGRs) Stimpo, Regoplant, and Charkor on the production of the second-generation energy crop Miscanthus × giganteus on marginal post-military soil was investigated during two vegetation seasons. The land, previously a tank training polygon, has not been in use since 1990 and has become marginal. Biological parameters (stem, shoot, and root lengths) and dry biomass values were evaluated in relation to the applied treatments. The multivariate general linear model (M-GLM) results showed a positive influence of Charkor on M. × giganteus development; the effect was markedly higher in the second year of vegetation. The impact of Stimpo and Regoplant was less noticeable; nevertheless, certain combinations of treatments showed satisfactory results. The M-GLM approach detected the inter-influence of the main factors of the production process, i.e., PGRs, soil, and year of growing. The results showed the predominant influence of year, PGRs and combined factor PGRs × year on the biological parameters; the other studied factors and their combinations were not as effective. Further research should focus on verifying the field-scale results for the M. × giganteus plantation established in a post-military area and compare the lab and field studies.

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“…The obtained scientific results contribute to the widespread use of the studied biostimulants in the technology of pea cultivation in the Southern Steppe zone of Ukraine to increase crop productivity and obtain a high-quality crop In experiments with yellow sorghum, V. Karpenko and S. Shutko (2018) proved that the greatest increase in the concentration of green pigments (a and b chlorophylls) and the increase in the net photosynthetic productivity index in leaves was observed when using the herbicide Pik 75 VG in combination with Regoplant. However, V. Pidlisnyuk et al (2022) found no significant effect of Stimpo and Regoplant on the growth and development of Miscanthus × giganteus when grown on depleted soils.…”

Effect of the Biostimulants of Microbiological Origin on the Entomopathogenic and Plant Parasitic Nematodes from Miscanthus × Giganteus Plantations

“…The effect of biostimulants on nematodes was tested in nine-centimeter Petri dishes using IJ and biostimulants were applied at a dose usually used in field conditions (Pidlisnyuk et al 2022). The following concentrations of biostimulants were used: Charkor: Ch1 -0.1%, Ch2 -0.4%; Regoplant: R1 -1.22%, R2 -2.44%; Stimpo: S1 -0.25%; S2 -0.50%.…”

The growth performance of Rhizophora apiculata using the cut-propagule method for mangrove rehabilitation in Indonesia

“…Likewise, giving the wrong concentration range can cause unexpected effects. In different concentrations, growth regulators can have the opposite effect, sometimes inhibiting plant growth because they cause toxicity to all plant tissues (Pidlisnyuk et al 2022). In this case, it was assumed that there was an interaction of concentration and the right type of PGR, resulting in better diameter growth of the upper hypocotyl cuttings.…”