THE APPLICATION OF SEQUENCE CLUSTER ANALYSIS ON DIVISION OF THE GROWTH STAGE OF SEEDLING HEIGHT FOR CINNAMOMUM PLATYPHYLLUM

Sequence sample cluster analysis is used to conduct a research on the growth process of the annual seedling height of Cinnamomum platyphyllum for seed sowing.The results indicate that the growth process of the seedling height can be divided into four stages:juvenile stage (April 7-May 5):early growth stage (May 6-July 15):rapid growth stage (July 16-September 5) and late growth stage (September 6-November 5).The rapid growth stage takes shorter time, but the increment at this stage accounts for most of the total increment of the whole year.It is very important to solve the contradiction between the supply and demand of water, fertilizer, temperature in the rapid growth stage and raise its growth rate.