|
(10-02) Trace elements in cereals - effect of soil type and growth conditions. Hoesch, J.1, Sager, M.*,1, 1 Bundesamt und Forschungszentrum f. Landwirtschaft, Wien, Austria ABSTRACT- Grains and stalks of cereals (wheat, barley, oats, maize) grown at 3 non- contaminated sites both in field and in pot experiments, were analyzed for their Ca-Cu-Fe-Mn-P-S-Zn total contents. Treatment with an NPK fertilizer containing MgSO4 as well as 20mg/kg Se as sodium selenate, led to selenium uptake mainly into the grains, largely metabolized as seleno-methionine, whereas the composition with respect to the other elements analyzed, was not changed significantly. The composition of grains obtained from the field experiments from 3 different Austrian soils and climates were not significantly different. Variations of soil type and soil composition was largely reflected in the stalks. From pot experiments with the same soils, higher element contents were obtained in both grain and stalks, except for P and Ca. Mineralization was significantly lower in maize grains, which cannot cover the daily needs of Ca, Cu, and Mn, if used as main feedstuff. From this, analysis of straw is much more suitable to serve as an environmental indicator than grains. Results from fields should never be mixed with results from pot experiments. Key words: cereals, trace elements, influence of soil type, selenium |
