EFFECTS OF CALCIUM, 6-BENZYLADENINE AND PACLOBUTRAZOL ON INFLORESCENCE QUALITY OF ONCIDIUM
Experiments were conducted in 2007 and 2008 to determine the effect of calcium (Ca), or Ca in combination with 6-benzyladenine (6-BA) or paclobutrazol (PP333) on plant growth, flowering, and inflorescence quality of Oncidium Goldiana × Onc. Guiena Gold. Treatments comprised: 300 mg/L Ca, 300 mg/L Ca + 50 mg/L 6-BA, 300 mg/L Ca + 100 mg/L 6-BA, 300 mg/L Ca + 100 mg/L PP333, and 300 mg/L Ca + 500 mg/L PP333. The experiments were arranged in a random block design consisting of 15 pots with flower buds about 1-5 cm in length per treatment. Days of budding stage, initial flowering and peak flowering were recorded. The variables were measured at peak flowering time: diameter of basal peduncle, peduncle length, inflorescence length, number of branches and florets. All the treatments promoted the flowering compared to the control, especially 300 mg/L Ca + 100 mg/L PP333 and 300 mg/L Ca + 500 mg/L PP333, These treatments advanced days of budding stage, initial and peak flowering in 6.2 d, 6.5 d, 15.0 d and 6.7 d, 6.6 d, 15.2 d, respectively. As far as inflorescence quality index were concerned, the effect of 300 mg/L Ca + 100 mg/L PP333 was better than 300 mg/LCa + 500 mg/L PP333. Thus our experiments suggest that 300 mg/L Ca + 100 mg/L PP333 was the best to improve Oncidium inflorescence quality.
Xiaorong Liu, , Feixiong Liao, , Yechun Xu, and Biqing Wang, (2012). EFFECTS OF CALCIUM, 6-BENZYLADENINE AND PACLOBUTRAZOL ON INFLORESCENCE QUALITY OF ONCIDIUM. Acta Hortic. 937, 621-626
orchid, plant growth regulator, cut flower