Annotation

The objective of the study was the detection of optimal amendments composition for preparing fertilizing ameliorative composts, their absorptive capacity estimation regarding to heavy metals and their impact on soil properties of ordinary terraced irrigated chernozems in laboratory and field experiments. The paper presents the results of laboratory researches in creation of fertilizing ameliorative composts on the base of glauconite, phosphogypsum and bird droppings. The optimal ratios of amendments were chosen. The best fertilizing and ameliorative properties have composts containing bird droppings and phosphogypsum; bird droppings and glauconite; bird droppings, glauconite and phosphogypsum in equal proportion. For the proof of the composts role in soil inactivation from heavy metals the results of laboratory experiments are presented. During these experiments soil was contaminated with single, double and triple maximum allowable concentration of zinc, copper, nickel, lead, and cadmium. The conducted laboratory and field researches showed that proposed fertilizing ameliorative composts enable to improve the ameliorative state of irrigated chernozems, restore their fertility and decrease the negative impact of pollutants as well.