多效唑促进果树花芽分化效果显著,已经在生产上大面积使用。但据笔者在沙田柚树上使用,表明多效唑对沙田柚果实有较大的影响。笔者于1998年在两株7年生沙田柚壮旺树上试用多效唑促花,使用浓度为1000×10-6+03%磷酸二氢钾,时间是9月16日和10月2日共两次。处理前花量少,果实呈沙 Paclobutrazol to promote fruit tree flower bud differentiation effect has been large-scale production. However, according to the author’s use of pomelo trees in Shatian, PP333 has a greater impact on Shatian pomelo fruit. In 1998, two 7-year-old Shatin pomelo trees were used to test the effect of PP337H. The concentration of potassium dihydrogen phosphate at 1000 × 10-6 + 03% was used for two times on September 16 and October 2 . Flowers before treatment, the fruit was sand