Abstract
Abstract Both chloride (Cl) and sulphate (SO4) were found to impair the uptake of phosphorus (H232PO4) through the roots of potato in a hydroponically conducted experiment. Radioactive phosphorus (32P) was used as the marker. The presence of either Cl and SO4 alone in the nutrient solution made no difference on the impairment. Both ions also inhibited the long‐distance transport of P from roots to shoots. The inhibition by Cl was much greater than that by SO4, and increased with the concentration of Cl rising from 0 to 15.5 mM in solution.
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