Control Of Nutrient Concentrations In Plant Growth Media
Published 1987 · Chemistry
Most nutrient-solution cultures used by plant breeders for screening varieties contain concentrations of P and trace metals far in excess of those found in normal soil solutions. Maintenance of realistic concentrations of these elements requires either that some concentration-buffering medium similar to that found in soil be used or that solutions be replaced before significant depletion occurs, usually by use of flowing cultures. A resin-controlled system for buffering solution pH and concentrations of phosphorus and any cationic nutrients is described. This system is capable of maintaining concentrations of the controlled nutrients within narrow ranges and is relatively inexpensive.