Application of potassium-rich processed dactte tuR as a fertilizer of slow and long-lasting eRect

Abstract

Together with the Institute of General and Inorganic Chemistry of NAS RA, the researchers of National Agrarian University of Armenia have developed the method of deriving a complex fertilizer of slow and long lasting effect from potassium-rich alumino-silicates (processed dacite tuff, PDT) containing potassium, calcium, magnesium, phosphorus and silicium, from which the nutri-ents pass into the soil solution gradually. Upon the field and vegetation experiments it has been stated that in case of using PDT with the amount equivalent to potassium, it provides higher yield in 10,0-15,3 % than it is in case of using potassium chloride. It has been proved that PDT prevents the leaching of ammonium and nitrate ions from the soil, which is very important for the redu-ction of the nitrogen loss from the nitrogenous fertilizers and for the environmental protection; it also promotes the increase of phosphorus and potassium in the yield and enhances the crops drought-resistance.