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Tydzień Mózgu w Szczecinie

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In a static experiment, which has been carried out since 1979, different fertilization treatment with manure and mineral nitogen were applied. In this experiment the following crop rotation potato, winter rye, winter rye was applied. The organic matter applied to the soil in the form of manure and straw had positive influence on the obtained yield and the contents of Mg in plant material. The manure in comparison to the straw had higherinfluenceonaccumulation and transformation of the Mg from not assimilable forms in the top soil by positive interaction with mineral fertilizers.
Field experiment conducted in the years 1991-93 at Experimental Station Łężany to study the effect of outside of roots fertilization on yielding and protein content in white lupine seeds. It was noted, that decisive effect on white lupine yield first of all had moisture and thermic conditions and genetic attribute of lupine varieties Foliar application of magnesium and microelements had no significant influence on white lupine yield.
The erythrocyte total magnesium concentration was eva-luated in 80 healthy children aged 2-16 years (40 boys and 40 girls). Its values ranged from 1,67 to 2,92 mmol/l and the mean value was 2,17 ±0,25 mmol11. No sex r age- related differences were noted. The me an value of the magnesium plasma/erythrocyte quotient rose with children's age.
The influence of Mg-fertilization on a change in chemical composition of fodder plants was investigated in three series of pot experiments. Different doses and forms of Mg were used in the experiments conducted on different soils. Magnesium was introduced every year as MgS04; once before the experiments outset dosed lHh as CaCO 3,MgCO3 and MgSO4,and increasing doses: 0,5; 1,0 and 2,0 Hh were used in the third series. Throug Mg-fertilization, there is a possibility to narrow Ca:P and K:(Ca+Mg) ratios, and to a lesser extent, K:Na ratio which improves the fodder quality of fodder plants.
The studies were based on the results of two pot experiments with oats and maize respectively. In the expriment with oats Mg was applied on the background of differentiated nitrogen rates and in the experiment with maize three magnesium rates soil or foliar applied were compared. Magnesium fertilization increased yield of fresh matter of maize and slight decreased the oats yield. It was associated with increased uptake and utilization of magnesium and narrowing of the following ratios Ca.Mg, K:Mg and K:(Ca+Mg) in tested crops.
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