Abstract
It was experimentally established that potato yields increased from increasing a single dose of NPK to a triple dose, which resulted in the highest yield (22.7 t/ha, which is 9.0 t/ha more than the control, or 65.7 %). The equivalent variants N2P2K2 and manure+NPK were almost equal in yield (21.0 and 21.2 t/ha). Due to liming of the soil, the yield increased by 1.7 t/ha or 12 %. The dry matter content in tubers in the fertilized variants decreased by 0.6-1.6% relative to the control, and starchy content also decreased by 0.35-2.25 % (17.3 % in the control). At the same time, the accumulation of protein increased by 0.17-0.34% and vitamin C by 0.1-3.6 mg%. The best option in terms of the amount of starch and vitamin C was manure + NPK. According to it, the payback of fertilizers was also the highest - 41.0 kg/kg a.i., in second place was N1P1K1+lime (33.5 kg/kg a.i.). With an increase in the level of fertilization, the payback of fertilizers consistently decreased from 24.3 to 16.2 kg/kg a.i. Conventionally, net income from fertilizers increased, and the profit per ruble spent decreased as the level of fertilization increased. Judging by the last indicator, the option manure + NPK was economically more profitable, for which the bioenergy coefficient was also the highest (4.48 units). In the conditions of the forest-meadow zone when cultivating potatoes, liming of acidic sod-gley soils is quite effective.
Published Version
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