Effect of applying organic and mineral fertilizers for 50 years on the fertility of podzolic chernozem in the central forest steppe in the Right Bank region of Ukraine. Report 8. Effect of systematic fertilizer application on the productivity of a grain-beet rotation

Martynovich, N.N.; Martynovich, L.I.

Agrokhimiya (8): 57-69

1995


ISSN/ISBN: 0002-1881
Accession: 002810472

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Abstract
The effects of systematic application of mineral and organo-mineral fertilizers to 5 cycles of an 11-course rotation were studied. The crops included annual grasses for hay, winter wheat, sugarbeet, maize, peas, vetch + rye for hay and barley. The treatments were no fertilizers, a total of 200 kg N + 240 kg P2O5 + 220 kg K2O/ha over the rotation, these rates with 85 t farmyard manure/ha and 3 rates of NPK applied to the 2 sugarbeet crops in the rotation. Over 50 years the total yield of the rotation increased by 17% with mineral fertilizers, 24% with organo-mineral fertilizers and 17-24% with increasing rates of NPK applied to sugarbeet. The effect of fertilizers increased in successive rotations and with improvements in cultivation technology and soil moisture supply. The organo-mineral system gave the highest yields. Increasing the total amounts of N, P2O5 and K2O to 380, 480 and 430 kg/ha, respectively, only increased yields of secondary products and reduced root sugar content and sugar yield of sugarbeet. Changes in the distribution of fertilizers between crops and in the ratio of N:P:K did not improve the effectiveness of the fertilizers. Even without fertilizer application for 50 years, the productivity of the highly fertile podzolic chernozem did not decline.