Magnesium-Phosphorus Interrelationships in Tomatoes
- Billy W. Hipp and
- C. J. Gerard2
Tomato (Lycopersicon esculentum) plants were grown in nutrient solution with Mg levels which varied from 0.96 ppm to 96 ppm and with P levels of 5 and 31 ppm. At low levels of Mg better growth was obtained when the P level was low. At high levels of Mg better growth was obtained when the P level was high. A nutrient solution containing 96 ppm of Mg promoted plant growth when the P concentration was 31 ppm but reduced growth when the P concentration was 5 ppm. Phosphorus fertilization of tomatoes grown on clay soils reduced the Mg content of the leaves from 1.2 to 0.65%. Analysis of leaves of commercial tomato fields during the late bloom stage showed a negative relationship between Mg and P (r = —0.896).Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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