CHARACTERIZATION OF NUTRIENT DISORDERS IN EUPHORBIA AMYGDALOIDES HYBRID ‘HELENA BLUSH’

Euphorbia amygdaloides hybrid ‘Helena Blush’ plants were grown in silica sand culture to induce and photograph nutritional disorder symptoms.
Plants were grown with a complete modified Hoagland’s all nitrate solution: (macronutrients in mM) 15 NO₃-N, 1.0 PO₄-P, 6.0 K, 5.0 Ca, 2.0 Mg, and 2.0 SO₄-S, plus µM concentrations of micronutrients, 72 Fe, 18 Mn, 3 Cu, 3 Zn, 45.0 B, and 0.1 Mo.
The nutrient deficiency treatments were induced that included a complete nutrient formula and complete minus one of the nutrients.
Nutrient toxicity symptoms were induced by increasing the element being studied (B and Cu) 10× higher than the complete nutrient formula.
Reagent grade chemicals and deionized water of 18-mega ohms purity were used to formulate treatment solutions.
The plants were automatically irrigated every 2 hours and the solution drained from the bottom of the pot and recaptured for reuse.
A complete replacement of nutrient solutions was done weekly.
Plants were monitored daily to document and photograph sequential series of symptoms as they developed.
Typical symptomology of nutrient disorders was recorded.

X International Symposium on Flower Bulbs and Herbaceous Perennials

B.E. Whipker, I. McCall

Hoagland’s solution, nutrient deficiencies

https://doi.org/10.17660/ActaHortic.2011.886.52