Agronomy Science, przyrodniczy lublin, czasopisma up, czasopisma uniwersytet przyrodniczy lublin
The present study was conducted during the period 2015–2017 based on a field experiment established in 2014 in the village of Rogów, Zamość County, Poland. The aim of this experiment was to evaluate the effect of subsurface application of different rates of a mineral compound fertilizer named Polifoska®6 NPK(S) 6-20-30(7) on yield of soybean, and some yield quality. The soybean was sown in soybean – winter wheat – maize crop rotation under no-tillage conditions. The mineral fertilizer was applied at a rate of 200 and 400 kg ha–1, and it was spread evenly under the soil surface at a depth range of 10–30 cm according to the operation of a soil loosener and fertilizer spreader attachment. Plots with surface fertilizer application were the control treatment. After harvest, yield and yield components of the soybean seeds were estimated. A chemical analysis of seeds was also performed in order to determine the quality of harvested yield. Deep mineral fertilizer application had a beneficial effect on soybean yield levels and contributed to an increase in the seed content of Met and Trp as well as of P, K, and Mg. Nevertheless, the seed content of Glu and Ala was found to decrease compared to surface fertilizer application. Soybean fertilized with the higher rate of the fertilizer Polifoska®6 was characterized by a greater seed total protein and P content. In turn, soybeans contained more fiber, amino acids (except for Cys, Met, and Trp), and also N, K, and Mg in the treatment with the lower rate of mineral fertilization.
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