In order to solve the problems of commercial orchid growers, who need to force Vanda flowering for both blooming on demand and uniformity, an appropriate environment to control flower development is a key factor. However, little research has been conducted on this topic. This research aimed to determine the effects of short day cycles on the flowering of Vanda ‘Manuvadee’, which usually has high productivity from September to February. Plants were grown under seven hour day lengths for three, six, and nine weeks before being moved to natural day length (approximately 12 hours/day), and then compared with plants cultivated only under a natural day length condition (control). All flowers were grown in an environment of 25 ± 2°C, 70–80% relative humidity. 21-21-21 (N-P₂O₅-K₂O) fertilizer was sprayed weekly at an average of 0.44 g per plant. Results showed that forcing under seven hour day lengths for six and nine weeks could on average delay flowering to 22 and 38 days later than the control treatment, respectively. Forced plants had 100% of first flower opening within 55 days, while the control treatment group gradually opened and took approximately 101 days to anthesis. The nine-week short day treatment provided the most inflorescences, and better longevity was obtained with the six and nine-week short day treatments. Short day cycles decreased TNC concentration in leaves, but did not affect C/N balance at the ninth week; however, P and K concentrations increased.

为了解决商业兰花种植者的问题，他们需要强迫Vanda开花，以使其按需开花和均匀开花，控制花卉生长的适当环境是关键因素。但是，关于此主题的研究很少。这项研究旨在确定短日周期对万代'Manuvadee'开花的影响，该品种通常在9月至2月间具有较高的生产力。将植物在7小时日长的条件下生长三，六和九周，然后移至自然日长（约12小时/天），然后与仅在自然日长条件下种植的植物（对照）进行比较。所有花朵均在25±2°C，相对湿度70–80％的环境中生长。21-21-21（NP ₂每周喷洒O ₅ -K ₂ O）肥料，平均每株植物0.44 g。结果表明，在7小时的日长下强迫施行6周和9周平均可以比对照处理分别推迟至22天和38天开花。强迫植物在55天内有100％的第一朵花开张，而对照组则逐渐开放，花了大约101天。九周短日处理提供最多的花序，而六周和九周短日处理获得更好的寿命。短日周期降低了叶片中TNC的浓度，但在第9周时并未影响C / N平衡；然而，磷和钾的浓度增加了。