The effect of nitrogen fertilizers on the microelement content in corn salad was investigated in spring and autumn of 2007. Plants were grown in containers under shading cloth. The containers were filled with clay loam soil and pH was 6.33. The experiment comprised of 4 treatments: I - control (without fertilization), II - fertilized with Ca(NO3)2, III - fertilized with NH4NO3, III - fertilized with compost. The content of Zn, Cu, Ni, Fe, Mn in the plant material was analyzed after dry mineralization and ash solution in HNO3 (3 : 1) the using the ICP-EAS method. Lower concentration of Cu, Mn, Fe in corn salad leaves was observed in treatments with fertilization (mineral and comspost) as compared with the control plants. Corn salad leaves fertilized with Ca(NO3)2 had the highest content of Fe, those fertilized with NH4NO3 t of Ni, Mn and fertilized with compost of Zn, Cu. Plants cultivated in spring contained more Zn, Cu and Ni and less Fe and Mn as compared to plants harvested in autumn. The highest amounts of Zn, Cu, Ni, Fe and Mn were in the corn salad leaves harvested in the object fertilized with ammonium nitrate during spring.
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