STUDY ON THE EFFECT OF STUMP DIAMETER AND HEIGHT ON SPROUT REGENERATION IN MANGIUM (ACACIA MANGIUM WILLD.)

The effect of diameter and height of stumps on sprout regeneration in mangium was studied in a short rotation mangium plantation. The study is based on observations of four height classes (25 cm,50 cm, 75 cm and 100cm) and two diameter classes (4.1~8.0cm and 8.1~12.0cm) of the stumps. The results showed that sprouting percentage of the stumps and number of sprouts per stump increased with the stump height, whereas they decreased with stump diameter. The length and diameter of sprouts and the total basal-area of all upright sprouts per stump increased with the increases in stump height and diameter. For achieving good results of sprout regeneration, it appears that young mangium plantation should be coppiced at heights ranging between 50~75cm.