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  • Author or Editor: Kenneth Kmiecik x
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Soils were fertilized with gypsum (CaSO4·2H2O) at rates up to 4 t·ha-1, and Ca2+ concentrations in pods of 12 snap bean (Phaseolus vulgaris L.) cultivars were determined, with the intention of improving snap beans as a source of Ca2+ for human nutrition. The addition of gypsum to the soil did not affect the Ca2+ concentration of pods, even though Ca2+ in the soil solution increased from 4 to 15 mmol·L-1. Calcium concentrations of pods of the various snap bean cultivars ranged from 4.1 to 5.7 mg·g-1 dry mass. `Top Crop', `Astrel', `Tenderlake', and `True Blue' had the highest Ca2+ concentration in the pods and `Labrador' and `Roma II' had the lowest. The results suggest that factors other than Ca2+ supply influenced the Ca2+ concentration of the snap bean pod. Therefore, increased Ca2+ concentration of pods may be better achieved through breeding and selection rather than Ca2+ fertilization when Ca2+ levels in soil are sufficient.

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