Summary
The effect of a wide range of ammonium concentrations (1.78×10−5 to 3.57×10−3 M) on the uptake and tissue content of P, K, Ca and Mg in intact soybean (Glycine max (L.) Merr. Cv. Amsoy) plants at different growth stages was studied. A stimulatory effect of ammonium on the uptake and content of P was observed over the entire concentration range, whereas this effect was observed only up to 500 μM of ammonium with respect to K. At higher levels (>500 μM), ammonium suppressed the uptake and content of K. Inhibition by high levels (>357 μM) of ammonium was also found for the uptake and content of Ca and Mg. Inhibition of uptake of K, Ca and Mg by high levels of ammonium may be an important factor in the mineral nutrition of soybean plants. re]19760420
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Rayar, A.J., van Hai, T. Effect of ammonium on uptake of phosphorus, potassium, calcium and magnesium by intact soybean plants. Plant Soil 48, 81–87 (1977). https://doi.org/10.1007/BF00015159
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DOI: https://doi.org/10.1007/BF00015159