2012 Volume 56 Issue 3 Pages 81-87
This study evaluated the differences in growth performance of the transplanted sago palm suckers with different earliness of trunk formation. Six- and nine-month-old suckers after transplanting (hereby abbreviated as the 6-MSAT and the 9-MSAT, respectively) were selected and started to measure the growth parameters. At about 57-60 months after transplanting (MAT), some of the 9-MSAT have attained to initiation of trunk formation and trunk formation stages. The others were still at the rosette stage as well as the 6-MSAT. During the first year establishment, the elongation rate of the 6-MSAT was slower than that of the 9-MSAT, but they were gradually similar thereafter. Suckers that attained to the trunk formation stage earlier showed the fastest elongation rate followed by those at the initiation of trunk formation and the rosette stage. However, their leaf emergence rates were similar. Suckers at the trunk formation stage were the tallest and produced the highest numbers of leaves followed by those at the initiation of trunk formation and rosette stages. In most cases, suckers at the rosette stage were characterized with a lower plant height at about less than 6 m. As the plant height was over 6 m, the growth stage progressed. The initiation or trunk formation stages could be indicated by the appearance of the leaflet length of the youngest expanded leaf, which should be about 130-140 cm long.