We applied the New Root-zone Environmental Control System (N.RECS), which comprises floor heating panels with chilled or heated water flow and heat-insulating pot trays, to cool the root zone of pot-grown strawberry (Fragaria × ananassa Duch.) nurseries in late summer, and investigated the effects on the subsequent flowering and yield in a super-forcing culture. Cooling at around 20°C with short-day (8-h daylength) treatment for 22 days accelerated and stabilized the flower bud formation of two June-bearing cultivars, ‘Nyoho’ and ‘Tochiotome’. The temperature at the soil surface, where the crown is located, was around 23°C on average during root-zone cooling, possibly acting as a cold stimulus on the shoot apical meristem, which initiated flowering. Root-zone cooling did not affect the development of new leaves during treatment. Combined root-zone cooling with short-day treatment promoted anthesis of the first inflorescence to the same degree as conventional night cooling, but neither did so alone. Weight-based early marketable yield before December was doubled but the total yield during October to March was not increased. These data suggest that root-zone cooling with short-day treatment of June-bearing strawberries may be applicable for super-forcing culture harvested from October to mid-November.

我们应用了新的根区环境控制系统 (N.RECS)，该系统包括带有冷水或热水流的地暖板和隔热锅盘，用于冷却盆栽草莓 ( Fragaria × ananassa ) 的根区Duch.) 苗圃在夏末进行，并研究了在超级强迫培养中对随后开花和产量的影响。在 20°C 左右降温并进行 22 天的短日照（8 小时日照）处理，加速并稳定了两个 6 月产品种“Nyoho”和“Tochiotome”的花芽形成。在根区冷却期间，树冠所在的土壤表面的平均温度约为 23°C，这可能是对茎尖分生组织的冷刺激，从而开始开花。根区冷却不影响处理期间新叶的发育。根区冷却与短日照处理相结合促进了第一个花序的开花，其程度与传统夜间冷却相同，但两者都不是单独的。12 月之前基于重量的早期可销售单产翻了一番，但 10 月至 3 月的总单产没有增加。这些数据表明，对 6 月份的草莓进行短日照处理的根区冷却可能适用于 10 月至 11 月中旬收获的超强培养。