Вплив кам'яновугільного попелу та гумату калію на вміст нітрогену і карбону в субстраті відвалу вуглепромисловості й органах Sorghum drummondii (Nees ex Steud.) Millsp. & Chase

Abstract

Researched ammonium, nitrite and nitrate nitrogen and organic carbon contents in gray-black unburned rock substrate from coal industry waste rock dump of Central Enrichment Factory (CEF) owned by PJSC “Lviv Coal Company” (Lviv Oblast, Ukraine) and total nitrogen and organic carbon contents in organs of Sorghum drummondii (Nees ex Steud.) Millsp. & Chase under effect of coal fly ash from the Dobrotvir thermal power plant (Lviv Oblast, Ukraine) and potassium humate “ГКВ-45” (made by LLC “PARK”, Lviv Oblast, Ukraine). Found high content of organic carbon and ammonium nitrogen in waste rock dump substrate with contrast to low content of nitrite and nitrate nitrogen compare to re­latively optimal soil mixture of the standard. Detected low carbon and nitrogen contents in organs of S. drummondii which grew on the waste rock dump substrate, as well as a significantly increased carbon/nitrogen-ratio (in this research the ratio of organic carbon content to total nitrogen content) compare to plants of the standard. Addition of coal fly ash in waste rock dump substrate decreased ammonium nitrogen and organic carbon contents with contrast to nitrite and nitrate nitrogen increasing, as well as organic carbon and total nitrogen in roots, stalks and leaves of researched plants. Introduction of potassium humate increased nitrite and nitrate nitrogen contents in waste rock dump substrate, organic carbon and total nitrogen contents in organs of S. drummondii. Changing of both studied macronutrients contents in plants under the effect of ameliorants caused decreasing carbon/nitrogen-ratio to the direction of the standard values. Growing of S. drummondii grass for 95 days increased organic carbon content in all options of substrates except the rock with potassium humate addition and decreased ammonium, nitrite and nitrate nitrogen contents in all researched options of substrates without exceptions. Noted that combined effect of coal fly ash and potassium humate on carbon and nitrogen contents in waste rock dump substrate and organs of S. drummondii is stronger than just one of both above mentioned researched ameliorants.