INFLUENCE OF WASTE WATER SLUDGE IN COMBINATION WITH ZEOLITE-CONTAINING ROCK ON PHYSICAL-CHEMICAL PROPERTIES OF SOIL AND PRODUCTIVITY OF CROPS
The authors present their scientific results on the aftereffect of zeolite-containing rocks, Penza city waste water sludge and their combinations on changes in the cation-exchange capacity, the amount of exchange bases, hydrolytic acidity and productivity of oats such as Jumping and Pea Jackpot. It has been established that on small-humus meadow and chernozem soils, the most significant impact on the optimization of physicochemical properties was exerted by the complex aftereffect of urban wastewater sludge with zeolite-bearing rocks. The cation-exchange capacity against their background exceeded the control by 4.85-5.70 mg-eqv/100 g of soil, the sum of exchange bases - by 6.57-7.71 mg-eqv/100 g of soil, the concentration of hydrogen ions was lower control at 1.72-2.01 mg-eqv/100 g of soil. The total productivity of oats and peas against the background of unilateral aftereffect of urban wastewater sludge was higher than the control by 5.35-8.52 t/ha per unit and against the background of their complex aftereffect with zeolite-containing rocks at 6.92-10.14 t/ha per unit.