RT Journal Article SR Electronic A1 Palátová, Eva A1 Mauer, Oldřich A1 Libus, Jiří T1 Bioelement contents in the planting stock tissues of Norway spruce (Picea abies /L./ Karst.) and European beech (Fagus sylvatica L.) after excessive N and Mg fertilization JF Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis YR 2014 VO 56 IS 1 SP 259 OP 266 DO 10.11118/actaun200856010259 UL https://acta.mendelu.cz/artkey/acu-200801-0031.php AB The paper informs of N, P, K, Ca and Mg-contents in the selected organs (tissues) of 4-year old Norway spruce (Picea abies /L./ Karst.) and 3-year old European beech (Fagus sylvatica L.) transplants after two years of Mg fertilization (100 kg Mg.ha<sup>-1</sup>.year<sup>-1</sup>) in the form of magnesium sulphate, and N fertilization (100 kg N.ha<sup>-1</sup>.year<sup>-1</sup>) in the form of ammonium sulphate. Analyses of buds, needles/leaves, bark and wood of above-ground part, fine roots (≤ 1 mm) and small-diameter roots (&gt; 1 mm) showed that the greatest amounts of uptaken nutrients are in both tree species stored in assimilatory organs and in buds. The increased supply of nitrogen showed most in small-diameter roots (spruce), and in root-wood, and wood of stem and branches (beech). The two species responded to the increased supply of magnesium by increasing the bioelement content in root-wood and in fine roots. The increase of Mg-content in leaves occurred only in the second year of the fertilization.