ISHS Acta Horticulturae 396: Hydroponics and Transplant Production
EFFECT OF K/CA RATIO IN THE NUTRIENT SOLUTION ON INCIDENCE OF BLOSSOM-END ROT AND GOLD SPECKS OF TOMATO FRUIT GROWN IN ROCKWOOL |
| Authors: | A. Nukaya, K. Goto, H. Jang, A. Kano, K. Ohkawa |
| Keywords: | Blossom-end rot (BER), Gold specks, Tomato(Lycopersicon esculentum Mill.), Rock wool, Ca uptake, K/Ca ratio |
| Abstract:
Tomatoes, cvs. 'Momotaro' and 'June pink', were grown with free drainage rockwool system for 65 days after transplanting in order to clarify effect of 4 K/Ca ratios in me/l (0.5, 1.0, 1.5 and 2.0) in the nutrient solution on the incidence of blossom-end rot (BER) and gold specks of fruits and Ca and K uptakes by the plants. The incidence of BER became higher and of gold specks lower with increasing K/Ca ratios in the nutrient solution. The percentage of fruit with BER and gold specks was higher at 'June pink' than at 'Momotaro'. The incidence of BER and gold specks was inversely related within the same cultivars. The cumulative Ca uptake at K/Ca ratio of 2.0 decreased to 1/3 at 'Momotaro' and ½ at 'June pink' compared to that of 0.5. The K uptake was also affected by the K/Ca ratios, but to a lesser extent than the Ca uptake was. | |
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