Comparing nutrient disorder symptomology of Lactuca sativa 'Salanova Green' and 'Salanova Red'

J.B. Henry, P. Cockson, I. McCall, B.E. Whipker
Quality and consumer standards drive the fresh produce market for vegetables such as lettuce. Recognizing nutrient disorders is imperative for maintaining quality and yield, and thus, this study was conducted to induce and record the symptoms in 'Salanova Green' lettuce (Lactuca sativa). 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 B and 0.1 Mo. Reagent grade chemicals and deionized water of 18 mega ohms purity were used to formulate treatment solutions. The nutrient deficiency treatments were induced with a complete nutrient formula with a single element withheld. Boron toxicity was also induced by increasing the element 10× higher than the complete nutrient formula. Plants were automatically irrigated, and the leached solution was captured for reuse. Plants were monitored daily to document and photograph symptoms as they developed. A description of nutrient disorder symptomology and critical tissue concentrations are presented and compared with a recent study conducted on 'Salanova Red' lettuce.
Henry, J.B., Cockson, P., McCall, I. and Whipker, B.E. (2020). Comparing nutrient disorder symptomology of Lactuca sativa 'Salanova Green' and 'Salanova Red'. Acta Hortic. 1273, 227-234
DOI: 10.17660/ActaHortic.2020.1273.31
nutrition, nutrient disorders, tissue analysis, lettuce

Acta Horticulturae