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’.

XXVI International Horticultural Congress: Berry Crop Breeding, Production and Utilization for a New Century

A. Yamasaki, T. Yano, H. Sasaki

flower initiation, Fragaria x ananassa, nitrogen, photoperiod

https://doi.org/10.17660/ActaHortic.2003.626.38