海南冬季诱导火龙果开花的补光条件

Supplementary Illumination for Pitaya Flower Induction in Winter in Hainan

以红肉火龙果(Hylocereus undulatus Britt)‘金都1号’为材料,通过不同的光谱及光照时间处理,研究不同的补光条件对诱导海南冬季火龙果开花的影响。结果表明:1)组合黄光和红光能够诱导火龙果成花,蓝光不能诱导火龙果成花。2)补光时间的长短和光谱的交互作用对火龙果成花有显著影响。3)不同月份,诱导火龙果成花所需的补光时间不同。采用15W组合黄光,在2月初至2月下旬,需补光5 h诱导成花;在2月下旬至3月上旬,补光4 h可诱导成花;在3月上旬到3月底,补光3 h就可诱导火龙果成花。

Red flesh pitaya‘Jindu No.1’(Hylocereus undulatus Britt) were treated with different spectra and illumination time to observe the effects of different supplementary illumination time on flower formation of pitaya in winter in Hainan. The results were given as follows. 1) The mixed yellow light and red light both could induce flower formation of pitaya, while the blue light could not induce formation of flower. 2) The spectrum and the supplementary illumination time had a significant interaction effect on flower formation of pitaya. 3) Different seasons required different supplementary illumination time. From early February to late February pitaya were induced to produce flowers when treated with the mixed yellow light at 15 W for 5 h for supplementary illumination. From late February to early March, 4 h supplementary illumination could induce flower formation. From early to the end of March, 3 h supplementary illumination was enough to induce flower formation of pitaya.