标题：CHANGES IN THE CONTENT, UPTAKE AND BIOACCUMULATION OF MACRONUTRIENTS IN GENOTYPES OF MISCANTHUS GRASS. POSSIBILITIES OF USING ASH FROM MISCANTHUS BIOMASS
摘要：The aim of this study was to determine the changes in the content, uptake and bioaccumulation of macronutrients in biomass of six genotypes of Miscanthus grass over a period of three years of cultivation. The possibilities of using ash from Miscan- thus biomass were also assessed. The field experiment was conducted in the three years in centralwestern (Poznań) and in the central-northern (Elbląg) part of Poland. Six genotypes of Miscanthus grasses were grown: MG1 (M1) Miscanthus gigan- teus (as standard), MG2 (M2) (plant code M 116)- hybrid M. sinensis (2x) x M. sacchariflorus (4x), MS3 (M3) (code M 105)- hybrid as above, MS4 (M4) (code M 114)- hybrid as above, MS5 (M5)- M. sinensis, obtained from hybrids 92M012 2012, MS6 (M6)- M. sinensis, obtained from hybrids 92M017 2004. Deep ploughing and harrowing was performed and fertilisation at N-80; P-100 and K-120 kg ha~(-1). Biomass of genotypes of Miscanthus grass grown in diverse soil and climatic conditions in Poland during three years contained the largest amount of carbon, hydrogen, silica, calcium, followed - in a decreasing order - by K, Mg, N, P, S and Na. The content of SiO_2, Ca, K and N was significantly differentiated in biomass of consecutive genotypes. The Miscanthus biomass yield has been found to be significantly negatively correlated with the total content of Ca, K, Mg and Na. High content of alkaline elements in crude ash obtained from biomass Miscanthus testifies to the possibility of its use in agriculture as liming agent.
