Effects of fertilization and crop rotation on magnesium content in winter wheat
2004
Kastori, R. | Molnar, I. | Sekulic, P. | Ralev, J. (Naucni institut za ratarstvo i povrtarstvo, Novi Sad (Serbia and Montenegro))
Samples for analysis were taken from eight long-term stationary field trials established in 1946/47 on a chernozem soil. The trials involve various crop rotations with and without NPK fertilizer application: two-field with and without fertilization; three-field with and without fertilization; four-field with fertilization; 12-field with fertilization (maize as preceding crop for wheat); 12-field with fertilization (soybean as preceding crop for wheat); and wheat monoculture with fertilization. Our results have showed that the type of crop rotation and fertilization had no significant effect on wheat grain Mg content. The straw Mg content depended largely on fertilization but not crop rotation type, meaning that fertilizer application primarily affected Mg levels in vegetative organs of wheat plants. The differences in Mg content between straw and grain were higher in the non-fertilized than fertilized treatments. The grain and straw yields depended primarily on fertilization, but they were also influenced by crop rotation, which affected Mg removal from soil by yield. Our results have shown that fertilizer application on chernozem soils well supplied with available Mg has no effect on wheat grain Mg content, but that it significantly increases the removal of this element from soil via increased yield. In the long-term, this fact should not be overlooked if plants are to be provided with optimum Mg supply, especially in soils with lower levels of this element.
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