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ADAPTIVE POTENTIAL OF SORGHASTRUM NUTANS, PENNISETUM SETACEUM AND SPODIOPOGON SIBIRICUS UNDER INTRODUCTION CONDITIONS OF THE STEPPE OF UKRAINE

Author(s) Martynova N. V. , PhD of Biology Sciences, , Oles Honchar Dnipro National University
Lykholat Y. V. , Doctor of Biology Sciences, , Oles Honchar Dnipro National University
Kabar A. M. , PhD of Biology Sciences, , Oles Honchar Dnipro National University
Rula I. V. , , , Dnipro Agrarian and Economic University
Hryhoriuk I. P. , Doctor of Biological Sciences, , National University of Life and Environmental Sciences of Ukraine
Category 201 "Agronomy"
year 2020 issue №1, 2020
pages 37-41 index UDK 58.006.581.552.4
DOI 10.31395/2310-0478-2020-1-37-41 (Link)
Abstract The adaptive potential of three tall grasses (Sorghastrum nutans, Pennisetum setaceum, Spodiopogon sibiricus) under the Ukrainian steppe zone conditions has been detected. Starting from the second year of life, the studied plants actively increased the underground and aboveground biomass, reaching their maximum by the end of the third year. Spodiopogon sibiricus was the tallest. Pennisetum setaceum showed the best parameters of horizontal growth. Two species (Pennisetum setaceum and Sorghastrum nutans) gave a high yield of fresh vegetative biomass (13.5-15.0 t/ha), which opens up prospects for their use as a forage crop. Thermal destruction of dry biomass of the studied plants passes in three stages and has one extremum point at each phase. The decomposition rate of the main components of the carbohydrate complex was significantly higher in Sorghastrum nutans than in other species. A large amount of hemicellulose in biomass causes some loss in caloric content of biofuel. Small values of activation energy indicate relatively weak molecular bonds and low thermal stability of the biomass. Therefore, the raw materials from the studied grasses can be recommended for use as an additive to various types of composite solid fuel.
Key words introduction, Sorghastrum nutans, Pennisetum setaceum, Spodiopogon sibiricus, morphology, productivity, raw materials, thermolysis.
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