The formation of the leaf surface area and biomass of the miscanthus giganteus plants depending on the sewage sludge rate

¹ National University of Life and Environmental Scienсes, Kyiv, 03041, Ukraine
² Ivano-Frankivsk National Technical University of Oil and Gas, Ivano-Frankivsk, 76019, Ukraine
³ Institute of Energy Crops and Sugar Beet, Kiyv, 03141, Ukraine
⁴ Dnipro State Agrarian and Economic University, Dnipro, 49600, Ukraine
⁵ University of Technology and Life Sciences in Bydgoszcz, Bydgoszcz, 85-796, Poland
⁶ University of Agriculture in Krakow, Krakow, 31-120, Poland

^* Corresponding author: kharytonov.m.m@dsau.dp.ua

Abstract

The case study to determine the peculiarities of Miscanthus giganteus aboveground biomass formation depending on sewage sludge and composts rate carried out in the Precarpathian region of Ivano- Frankivsk province on sod-podzolic soils. The largest area of the leaf surface of miscanthus is formed in the trials where fresh sewage sludge was applied in the rate of 20 - 40 t/ha. The leaf surface area increases from 19 up to 24.0 cm2/plant, and the yield of raw mass of plants at the level of 23.5 - 25.1 t/ha due to increasing rates of sewage sludge application. The highest indicators of net photosynthesis productivity were found in the period of intensive growth, which amounted to 7.78 g/m^²/day and in the maturation period of 7.56 g/m^²/day in the trial SS - 40 t/ha + N₁₀P₁₄K₅₈. The amount of dry mass of miscanthus plants significantly depends on the height of the shoot and the leaf surface area of the plants. The use of compost based on sewage sludge and straw in a ratio of 3: 1 at a rate of 30 t/ha contributes to the dry weight of miscanthus plants at the level of 15 t/ha.