Abstract
The duration of trunk growth stage (after the completion of rosette stage until the initiation of flowering), and starch accumulation in different trunk age and different trunk height of sago palm were investigated in Sepik basin, Papua New Guinea, in 1992.
The major findings are as follows.
1) Based on the observation of seedlings tarnsplanted in 1981, it was ascertained that the duration of trunk growth stage was 10 years in the earliest variety and 16 years in the latest variety.
2) In two and half or three years after the initiation of trunking, starch accumulation initiated from the basement of trunk, and succeeded its accumulation to the upper part for the following aproximately 5 years. After then, the starch content ratio reached almost a plateau inside the trunk except the uppermost part.
