Урожайність міскантусу гігантського залежно від застосування нових елементів технології вирощування в умовах Лісостепу України

Abstract

Purpose. Identification of the patterns of dry aboveground and underground biomass yield as affected by the background of mineral fertiliser and pre-planting soaking rhizomes in the solutions of biological products Quantum Gold and Vympel-K followed by single and double foliar dressing of giant miscanthus plants. Methods. Field experiments, mathematical-statistical and graphic models. Results. Based on research (2016–2019), it was found that against an increased background of mineral fertiliser N60P60K60, single foliar dressing with Quantum Gold appeared more efficient compared to double (2.4 vs. 2.1 t/ha). On the contrary, double foliar dressing with Vympel-K increased dry biomass yield by 0.5 t/ha. Dry biomass yield was the most significantly influenced by the interaction of factors of mineral fertiliser/foliar fertilisation (32%). The factor of year caused the variability of this indicator by 33%, while the factors of the fertiliser background and foliar fertilisation 22 and 10%, respectively. The highest aboveground biomass yield (3.5 t/ha) was recorded in the treatment with soaking rhizomes in Quantum Gold with the cross-action of both products at double foliar dressing. The factor of influence of pre-planting soaking rhizomes on this indicator was the largest (34%), for the formation of underground biomass (5%). Conclusion. New cultivation practices – mineral fertilisation background and foliar dressing – were equal in terms of the influence on the formation of yields of both aboveground and underground biomass (22 and 24, 10 and 9%). The factor of year was more important for the formation of the underground biomass (47 vs. 33%). In the formation of the dry aboveground biomass yield, the largest increase (1.1 t/ha) was obtained with soaking rhizomes in Vympel-K and two treatments with the same product.