关键词: 补光, 大棚, 火龙果, 促花

Abstract: Effect of supplemental lighting on promoting flower of pitaya in greenhouse in winter was carried out. Results showed that the flower bud rate of pitaya reached upto 83.3% in the first batches at the conditions of average light intensity 500 lx, 6 h each day for lasting 45 d, the average flower bud rate of old branches(branch age was equal or greater than twelve months) was 15.2%, the average flower bud rate of young branches (branch age was less than twelve months) was 28.0%, the flower bud branches occupied 21.4% of all branches. The percentage of bud points which flowered on old branches was 2.7 percent, while that on young branches was 2.9%. However, there was not flower bud on those plants without supplemental lighting. The results indicated that supplemental lighting could effectively promote flower buds of pitaya in greenhouse in winter.

Key words: supplemental lighting, greenhouse, pitaya, promoting flower