The Journal of Horticultural Science & Biotechnology
Vol. 37 No: 2
Effects of Major Nutrients on Two Varities of Tulip Grown in Sand Culture
W.F. CHEAL and E.J. HEWITT
Two varieties of tulip, Golden Harvest obtained from Cornwall and Lincolnshire and Krelage's Triumph from Cornwall, were grown in sand culture with deficiency, normal and high levels of major nutrients in various combinations.
Symptoms produced by deficiencies of nitrogen, phosphorus, potassium and magnesium mainly resembled those recorded previously with the variety Rose Copland.
Leaf measurements and bulb yields showed nitrogen deficiency to have the most significant effect on growth, and symptoms were evident
several weeks before flowering.
Leaf areas and bulb yields were apparently closely related for Nil, nitrogen and phosphorus deficiency treatments but were less clearly related for other treatments, especially in Krelage's Triumph.
Cornish stock of Golden Harvest tulip was more sensitive than Lincolnshire stock to deficiencies, especially of phosphorus. Krelage's
Triumph was also less sensitive on the whole, and especially in terms of leaf area, than Golden Harvest from the same source, even though the former had the smaller-sized bulbs.
High levels of sodium produced succulent growth and soft bulbs. There were no marked effects of high levels of nitrogen, phosphorus, or
potassium on yields, although leaf area of Cornish bulbs particularly was decreased by some of these treatments, possibly in relation to high nitrogen level.
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