Articles
CHARACTERIZATION OF NUTRIENT DISORDERS OF SOLENOSTEMON SCUTELLARIOIDES ‘LIME LIGHT’ IN SILICA-SAND CULTURE
Article number
1034_77
Pages
607 – 613
Language
English
Abstract
Solenostemon scutellarioides Lime Light were grown in silica-sand culture to induce and catalog nutritional disorder symptoms.
Plants were grown with a complete, modified Hoaglands solution (macronutrients in mM, micronutrients in µM): 15.0 NO3-N, 1.0 PO4-P, 6.0 K, 5.0 Ca, 2.0 Mg, 2.0 SO4-S, 72.0 Fe, 18.0 Mn, 3.0 Cu, 3.0 Zn, 45.0 B, and 0.1 Mo.
The control plants were grown using a nutrient formula containing all essential nutrients.
Each nutrient deficiency treatment was induced by using the complete formula minus only one essential nutrient.
Reagent grade chemicals and deionized water of 18-mega ohms purity were used to formulate treatment solutions.
Toxicity of boron was also induced by increasing the element 10X higher than the complete formula.
Plants were automatically irrigated every 2 hours, drained from the pot bottom and solution captured for reuse.
The nutrient solutions were replaced weekly.
Researchers monitored plants daily to document and catalog sequential onset of symptoms.
Symptoms of N, P, Ca, Fe deficiency and B toxicity were the first disorders to exhibit in Solenostemon scutellarioides Limelight. The chartreuse coloration of this cultivar compounded difficulties in assessing symptomology of some nutrient disorders, particularly those that manifested with yellowing discoloration or chlorosis.
Plants were grown with a complete, modified Hoaglands solution (macronutrients in mM, micronutrients in µM): 15.0 NO3-N, 1.0 PO4-P, 6.0 K, 5.0 Ca, 2.0 Mg, 2.0 SO4-S, 72.0 Fe, 18.0 Mn, 3.0 Cu, 3.0 Zn, 45.0 B, and 0.1 Mo.
The control plants were grown using a nutrient formula containing all essential nutrients.
Each nutrient deficiency treatment was induced by using the complete formula minus only one essential nutrient.
Reagent grade chemicals and deionized water of 18-mega ohms purity were used to formulate treatment solutions.
Toxicity of boron was also induced by increasing the element 10X higher than the complete formula.
Plants were automatically irrigated every 2 hours, drained from the pot bottom and solution captured for reuse.
The nutrient solutions were replaced weekly.
Researchers monitored plants daily to document and catalog sequential onset of symptoms.
Symptoms of N, P, Ca, Fe deficiency and B toxicity were the first disorders to exhibit in Solenostemon scutellarioides Limelight. The chartreuse coloration of this cultivar compounded difficulties in assessing symptomology of some nutrient disorders, particularly those that manifested with yellowing discoloration or chlorosis.
Authors
Y. Jin, B.A. Fair, B.E. Whipker, I. McCall, J. Frantz
Keywords
Hoagland’s solution, nutrient deficiencies, coleus
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