EFFECTS OF PLANT DENSITY, FERTILIZATION AND CROWN REMOVAL ON FRESH PINEAPPLE PRODUCTION FOR EXPORTING
This research aimed to investigate some cultural practices affecting yield and quality of fresh pineapple fruit production for export. The experiments were conducted at Chanthaburi Horticultural Research Center during October 2007-September 2010. Three pineapple cultivars, Trat Si Thong, Sawi (Queen group) and Pattawia (Smooth Cayenne group), were examined. Plant densities were 28,100, 34,400, 40,600 and 46,900 plants/ha for Trat Si Thong and Sawi and were 46,900, 56,300, 65,600, 75,000 plants/ha for Pattawia. Fertilizer application was carried out following Good Agricultural Practice (GAP) recommendation or GAP+calcium application. The crown removal was conducted a week after the last flower bloom. The results revealed that to obtain marketable fruit at about 900 g per fruit, the optimal plant density was 46,900 plants/ha for Trat Si Thong and Sawi and 75,000 plants/ha for Pattawia yielding 43.1, 36.3 and 74.4 t ha-1, respectively. The fertilizer application as GAP+foliar or soil dressing of fertilizer, 15-0-0+26.3 Ca, could not reduce internal browning after storage at 13°C for 21 days. The symptoms exist as 88, 19 and 13% in Trat Si Thong, Sawi and Pattawia, respectively. The crown removal resulted in little crown size and fruit sun-burn, particularly in Trat Si Thong and Sawi and internal browning in Pattawia. Without crown removal, fruit percentage of Extra, Class I or II increased to 94 and 80% in Trat Si Thong and Sawi. However, the internal fruit quality was not influenced by the plant density, fertilization and crown removal.
Jantee, C., Sangudom, T., Hama, J. and Saradhuldhat, P. (2014). EFFECTS OF PLANT DENSITY, FERTILIZATION AND CROWN REMOVAL ON FRESH PINEAPPLE PRODUCTION FOR EXPORTING. Acta Hortic. 1024, 205-210
Queen, Smooth Cayenne, GAP, internal browning, Ananas comosus