Abstract: Effects of PP₃₃₃ or 6-BA on the main ornamental characters were investigated with 3-year-old cottage P. fortuneana (Maxim.) Li. The result shows that PP333 treatment can shorten shoot growth, diminish and thicken leaves, postpone the first bloom, prolong florescence, add quantity, shorten fruit stalk, and significantly increase its ornamental value. The concentration of PP333 has a direct correlation with the root/top ratio. Although 6-BA retrained the shoot growth, lessened the leaf area and improved the diameter of the shoot, it reduced the fruit quantity and the chlorophyll content of the leaves. Two growth regulators decreased the contents of endogenous GA and IAA in the leaves, but increased the content of endogenous ABA. The comprehensive evaluation using the gray system theory shows that PP₃₃₃ at 500mg·L^-1 produces the optimal effect on the ornamental characters. The treatment with PP333 improves more ornamental evaluation than that 6-BA, in agreement with the practical observation.

Key words: Potted plant, P. fortuneana (Maxim.) Li, Main ornamental characters, Chemical regulation, endogenous hormone