植物工場におけるイチゴの周年栽培に関する研究（第２報） ‘愛ベリー’の開花・結実に及ぼす施肥条件と定植時期の影響

Abstract

The effects planting time (A : At 2 weeks before starting of short-day treatment, B : At the starting of short-day treatment, C : At the end of short-day treatment), and starting time of nutrient supply (1 : At 2 weeks before starting of short-day treatment, 2 : At the starting of short-day treatment, 3 : At the end of short-day treatment) on flowering and yield in strawberry cv. 'Ai-berry', were investigated.In the plots which were planted 2 weeks before short-day (SD) treatment (treatment A), almost plants flowered on every starting time of nutrient supply, but early nutrient supply delayed flowering. In B3 and C3 plots. flowering were delayed, and the rate of flowering were about 80% by treatment B3 and C3. Flowering was inhibited in B2 treatment.The earlier nutrient supply to the plant that grown 2 weeks before flower induction (10 hour day-length), the yield was more increased.Vegetative buds were often aborted in A3 and B3 plots, because of the concentration of NO3- of the petiole was low during flower induction.Thus, planting before flower induction and supplying nutrients through-out the cultivation should be suitable for strawberry production in plant factory.