Magnesium content in individual parts of Avena sativa L. plant as related to magnesium nutrition

In the pot experiment of Avena sativa L. the influence of Mg rates and P nu trition grown by degrees upon Mg, Ca and K content in panicle, stem and in green upper and yellow lower leaves was studied. The content of cations sig nificantly changed in individual parts of the plant. The highest content of magnesium was found within the dry matter of upper green leaves (0.13-0.23 %). A lower content of Mg in the lower yellow leaves (0.09-0.11%) was also found, Compared with upper photosynthetically active leaves, it indicates a possibility of reutilization, which can be, when compared with potassium, lower in order. The effects of Mg doses were significantly revealed in its higher content mainly in functionally active leaves (for 80%). The decrease in Mg content (especially in leaves) was observed with the variant of P nu trition absence (for 44%).