Floriculture crops affect substrate-pH and resulting solubility of micronutrients in the root
zone during commercial production. Two hydroponic experiments and tissue data from a
container study were analyzed to determine whether (1) cation or anion uptake was related
to solution acidity and basicity in the root zone for three floriculture crops [geranium
(Pelargonium× hortorum, Bailey. LH), petunia (Petunia× hybrid, Vilm.-Andr.), and impatiens
(Impatiens wallerana, Hook. F.)] and whether (2) the proportion of NH 4+-N versus NO 3−-N …

Floriculture crops affect substrate-pH and consequently the solubility of micronutrients
during commercial production. Studies with agronomic species have shown that roots affect
rhizosphere-pH through an imbalance in the uptake of cation and anion nutrients. However,
the relationship between cation-anion uptake and effect on solution acidity has not been
evaluated with floriculture species. Data from a container study were analyzed and a
hydroponics experiment was run to evaluate whether cation: anion uptake was related to …