Nutrient disorders of Lactuca sativa 'Salanova Red'
Nutrient disorders of red-leafed plant species often appear different from symptoms on green-leafed species. 'Salanova Red' lettuce (Lactuca sativa) plants were grown in silica sand culture to induce symptoms of several nutritional disorders. Plants were grown with a complete modified Hoagland's solution. Nutrient deficiencies were induced with a complete nutrient formula withholding a single element. Boron toxicity was also induced by increasing the element 10× higher than the complete nutrient formula. Plants were monitored daily to document and photograph symptoms as they developed. Several nutrient disorders led to a significant reduction in plant dry weight. Nitrogen, phosphorus, sulfur, and boron deficiencies all resulted in visually redder plants. Nutrient deficient lettuce had lower foliar nutrient concentrations than control plants.
Henry, J.B., McCall, I. and Whipker, B.E. (2019). Nutrient disorders of Lactuca sativa 'Salanova Red'. Acta Hortic. 1266, 283-290
nutrition, tissue analysis