ISHS Acta Horticulturae 396: Hydroponics and Transplant Production
EFFECTS OF NITROGEN FORM, NUTRIENT CONCENTRATION AND CA CONCENTRATION ON THE GROWTH, YIELD AND FRUIT QUALITY IN NFT-TOMATO PLANTS |
| Authors: | M. Hohjo, C. Kuwata, K. Yoshikawa, T. Ito |
| Keywords: | Tomato, Nutrient Film Technique (NFT), Nitrogen form, Nutrient concentration, Ca concentration, Blossom-end rot |
| Abstract:
Tomato plants were grown in Nutrient Film Technique to investigate the effects of nitrogen form, nutrient concentration and Ca concentration on its growth, yield and fruit quality. The Exp. 1 was conducted with three ratios of NO3-N:NH4-N under two nutrient concentrations. Exp.2 was carried out with two ratios of NO3-N:NH4-N under three Ca concentrations. In Exp. 1, shoot and root fresh weights were enhanced by higher NH4-N ratio. Water uptake increased with increasing NH4-N ratio. Ca and Mg uptakes decreased by the addition of NH4-N under higher nutrient concentration. Marked decrease in yield was observed in plants grown with higher NH4-N under higher nutrient concentration, showing heavy symptoms of BER. In Exp.2, the addition of NH4-N resulted in increased shoot growth and water uptake, and decreased Ca and Mg uptakes as observed in Exp.1. Low Ca concentration resulted in BER remarkably under high NH4-N ratio. | |
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