ISHS Acta Horticulturae 823: XI International Symposium on the Processing Tomato
THE EFFECT OF WATER AND POTASSIUM SUPPLEMENT ON YIELD AND LYCOPENE CONTENT OF PROCESSING TOMATO |
| Authors: | L. Helyes, J. Dimény, A. Bőcs, G. Schober, Z. Pék |
| Keywords: | irrigation cut-off, Brix, soluble solids |
| Abstract:
An open field experiment was conducted to study the effects of irrigation and potassium supplementation on the yield, soluble solids and lycopene content of processing tomato fruit. Three different irrigation treatments were compared: regularly irrigated, irrigation cut-off 30 days before harvest, and unirrigated. Irrigation scheduling was based on the average daily temperature. Each irrigation treatment had two different potassium rate subplots (454 and 555 kg ha-1 respectively). Across all potassium rates, the regularly irrigated treatments yielded higher than the irrigation cut-off and unirrigated treatments. Soluble solids content and °Brix yield were highest in the regularly irrigated + high potassium and the irrigation cut-off + high potassium treatments. All of the irrigated treatments showed significantly higher marketable yield with the high rate of potassium, while this effect did not occur in the unirrigated treatments. The high potassium rate increased the lycopene content of tomato in the irrigation cut-off and unirrigated treatments. | |
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