OUT-OF-SEASON PRODUCTION OF STRAWBERRY: EFFECTS OF A SHORT-DAY TREATMENT IN SUMMER
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.
Yamasaki, A., Yano, T. and Sasaki, H. (2003). OUT-OF-SEASON PRODUCTION OF STRAWBERRY: EFFECTS OF A SHORT-DAY TREATMENT IN SUMMER. Acta Hortic. 626, 277-282
flower initiation, Fragaria x ananassa, nitrogen, photoperiod