ISHS Acta Horticulturae 626: XXVI International Horticultural Congress: Berry Crop Breeding, Production and Utilization for a New Century
OUT-OF-SEASON PRODUCTION OF STRAWBERRY: EFFECTS OF A SHORT-DAY TREATMENT IN SUMMER |
| Authors: | A. Yamasaki, T. Yano, H. Sasaki |
| Keywords: | flower initiation, Fragaria x ananassa, nitrogen, photoperiod |
| Abstract:
The effects of a short-day treatment in summer on the flower initiation were investigated using three varieties of strawberry plants. Daughter plants of three Japanese June-bearing varieties, ‘Nyoho,’ ‘Sachinoka,’ and ‘Kitanokagayaki,’ were grown in the following conditions: short-day (8-hr photoperiod) for the month of July using tunnel covering with a shading film. Flower buds were successfully induced with a short-day treatment in ‘Nyoho’ and ‘Sachinoka’ in spite of high daytime temperatures; however, the flower initiation in ‘Kitanokagayaki’ lagged the other two varieties by seven days. Three different nitrogen fertilizer levels were applied. High nitrogen delayed flower initiation in ‘Nyoho’ and ‘Kitanokagayaki’. | |
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