Nutrient uptake by corn under different types and doses of fertilizers
Abstract
Aims. Determine nutrient uptake by corn under different types and doses of fertilizers. Methods. Laboratory, measuring, calculation and comparison, analysis, statistical. Results. Economic nitrogen removal with grain and straw yields increased from 130.8 to 211.6 kg/ha or by 62 % with N80 application and up to 243.6 kg/ha or 86 % with double dose of nitrogen fertilizers. The application of half of the complete minerals (N80P30K55) increased the economic yield up to 222.0 kg/ha or by 5 % and up to 268.5 kg/ha when applying N160P60K110 or by 10 % compared to nitrogen systems. The economic removal of phosphorus with the yield of grain and straw increased from 49.0 to 66.6 kg/ha or by 36 % when N80 was applied and up to 76.7 kg/ha or 57 % when a double dose of nitrogen fertilizers was applied. The application of half of the complete minerals (N80P30K55) increased the economic yield up to 71.5 kg/ha or by 7 % and up to 91.4 kg/ha with the application of N160P60K110 or by 19 % compared to nitrogen systems. The economic removal of potassium with grain and straw yields increased from 145.2 to 193.9 kg/ha or by 34 % with the application of N80 and up to 233.5 kg/ha or 61 % with the application of a double dose of nitrogen fertilizers. The application of half of the complete minerals (N80P30K55) increased the economic yield up to 206.6 kg/ha or by 7 % and up to 260.7 kg/ha when applying N160P60K110 or by 12 % compared to nitrogen systems. Conclusions. The economic removal of nitrogen, phosphorus and potassium increases significantly by using systems containing a nitrogen component. It was found that the economic removal of nitrogen increases from 130.8 kg/ha in the variant without fertilizers to 268.5 kg/ha with the application of N160P60K110, the economic removal of phosphorus – from 49.0 to 91.4, the economic removal of potassium – from 145.2 to 260.7 kg/ha. Moreover, the amount of economic removal varies greatly depending on weather conditions of the research year.
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