Folia Pomeranae Universitatis Technologiae Stetinensis

The aim of research was preliminary assessment the influence of effectivemicroorganisms and fertilization manure on the yield, morphological traits, photosyntheticactivity, water use efficiency of Japanese knotweed (Polygonum Cuspidatum Siebold & Zucc.)and on amount of selected minerals in soil. Field experiment was conducted in 2014 and 2015in Experimental Station in Lipnik near Stargard Szczeciński (53o12’N; 14o27’E), Poland.Experimental factors were EM – effective microorganisms (preparation) and fertilization manure.The experiment was conducted in the totally random system. The experiment consisted of fourobjects, in four replication: 1 – control (without EM preparation and fertilization); 2 – EMpreparation; 3 – fertilization granulated manure; 4 – EM preparation and fertilization granulatedmanure. Effective microorganisms and manure fertilization had no significant effect on the yield,the number of plants per plot, their height, and diameter of stems of Japanese knotweed. Plantsfertilized with manure and EM preparation with manure had higher concentrations of studiedmacronutrients (magnesium, calcium, phosphorus) and microelements. Greater intensity ofassimilation and transpiration was observed in plants grown in the control plots (without EM andmanure). Plant grown on objects fertilized with manure as well as EM preparation and manure--treated better utilized water during its shortages (in 2015 year).