EFFICIENCY OF USING FERTILIZERS IN AN IRRIGATED VEGETABLE AND FODDER CROP ROTATION ON THE LEFT BANK FOREST-STEPPE OF UKRAINE

Abstract

For the irrigated vegetable and fodder crop rotation systematic application of organo-mineral fertilizer system provides stabilization the quality of humus (increase in the content of humus in the plow layer to 4,35 %, the sum of absorbed bases to 31,5 mq/100 g of soil). The joint use of organic and mineral fertilizers contributes an increase in the yield of grain crops in crop rotation by 10-64 %, perennial grasses - by 1-16 %, cucumber - by 17-35 %, onion - by 13-37 %, tomato - by 28-44 %, white cabbage - by 46-52 %, beetroot - by 16-42 %. The maximum effect is achieved using 7 t/ha of the crop rotation area of organic fertilizers + N₆₀R₅₇K₅₀ (separately) and 14 t/ha of organic fertilizers + N₃₀P₂₈K₂₅ (locally).