Seasonal variation of microelements concentration (Fe, Mn and Zn) in smonitza
2005
Milivojevic, J.(Agricultural Research Institute Serbia, Kragujevac (Serbia and Montenegro). Center for Small Grains) | Jakovljevic, M. | Jelic, M.
The issue studied was the seasonal variation of Fe, Mn and Zn concentration in smonitza in Kragujevac area (Serbia). Dry and wet soil samples, taken from out field and meadow. The aim was to explore the way of changeable concentration of available Fe, Mn and Zn during year under various growth phases of cultivated plants and moisture and temperature conditions as well as influence of soil samples drying on results exacting. Analyzing average values by seasons, it was noticed that the least DTPA - TEA extracted Zn content was found out during winter and spring period in dominant reduction conditions, while the most one during summer. At the other side, maximum DTPA - TEA extracted Fe and Mn content in wet samples was observed in spring (April), during period with dominant reduction conditions, but minimum during autumn (October). It was registered, too, that the drying of wet samples leaded to the increase DTPA - TEA extracted of cations microelements content in samples taken out from both ecosystems: Fe for 1.33 and 1.77 times, Mn for 1.1 times for both ecosystems and Zn for 1.97 and 1.78 times. Drying factor did not influence the amounts of microelements extracted by 0.1M HCl, except Mn (in samples taken out field), and it whose increased 1.42 times.
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