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The effects of N/P/K applications on floral budding of Phalaenopsis at high altitude or with air-conditioning were studied.Results showed that the optimum fertilizer ratio was N:P2O5:K2O=10:40:20,10:30:20 or 10:30:40.At elevations above 800 meters,the essential budding requirements included(a) healthy plantlet with 4～5 leaves,(b) more than 20cm between two leaves,(c) thick and strong roots,and(d) no pest infestation and disease-free.On indoor air-conditioned cultivation,the temperature was best maintained at 25～28 ℃ in the daytime and 15～18 ℃ at night,illumination intensity at 30000～35000 lx,and 18 hours low temperature treatment per day.
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