Plant Growth, Water Use and Nutritional Response to Rhizosphere Differentials of Oxygen Concentration
1961
Letey, J. | Lunt, O. R. | Stolzy, L. H. | Szuszkiewicz, T. E.
Various oxygen level treatments were applied to snapdragons grown in cylinders by varying the oxygen concentration above the soil surface. Other soil physical properties were held relatively uniform during the experiment. The aerial portions, except for part of the stem, were isolated from the rhizosphere treatments. Eight treatments ranging from < 1% to 21% O₂ were applied. In general plant growth increased with higher oxygen levels. The relative content of phosphorus and potassium in shoots increased with increasing oxygen concentration. Sodium content increased with decreasing oxygen and showed a very marked increase at the lowest oxygen levels. Water use decreased with decreasing oxygen.
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