UPTAKE OF MICROELEMENTSINOILSEED RAPE PLANTS UNDER MINERAL FERTILIZATION WITH NITROGEN AND PHOSPHORUS

With a large and growing demand in the market, rapeseed (Brassica napus subsp. napus.) is a crop with relatively high requirements for macronutrient fertilization. The aim of the experiment was to study the effect of mineral fertilization with different doses of nitrogen and phosphorus on the accumulation of microelements in the vegetative organs and grains of oilseed rape plants.The experiment was carried out in the long-term experimental fields of SCDA Livada. There were taken and analyzed 96 plant samples and the results were statistically processed. Fertilization with nitrogen and phosphorus led to statistically assured changes in the contents of microelements, mostly in the aerial parts of the rapeseed. Regarding their accumulation in the grain, there were obtained variations of contents that were not significant to all doses of fertilizer applied. The conclusions of the experiments showed that the evaluation of contents of manganese, iron, zinc, and copper in rapeseed plants can help in choosing the optimal dose of mineral fertilizers in order to assure balanced microelement composition in plants and thus, consequently to avoid their deficiency