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通过多年、多点的试验，研究了ＣＰＰＵ对猕猴桃果实生长发育的影响和ＣＰＰＵ促进猕猴桃果实增大的最适使用时期。结果表明：从花后５ｄ到６０ｄ，所有处理都明显地增大了果实，增长的幅度随处理时间的推迟而减弱。猕猴桃果实的增长基本上呈Ｓ曲线：在花后３周内，果实增长缓慢；此后的一个月内，果实增长加快；再往后，增长的速度下降，保持相对同等的速度继续增长，直至采收。与对照比较，处理果实的快速增长更加明显，ＣＰＰＵ对促进猕猴桃果实增大的作用能持续很长的时期。最有效的使用时期是在花后１０—３０ｄ，正值果实的快速生长时期。
After many years of experiments, the effect of CPPU on the growth and development of kiwifruit and the optimum period of CPPU for promoting the fruit growth of kiwifruit were studied. The results showed that all the treatments increased fruit obviously from 5 days to 60 days after anthesis, and the amplitude of the increase was weakened with the delay of treatment time. The fruit growth of kiwifruit basically showed a S-curve: the fruit grew slowly within 3 weeks after anthesis; the fruit grew faster within the next month; then the rate of growth declined and kept increasing at a relatively equal pace until Close Compared with the control, the rapid growth of processed fruits was more obvious. The effect of CPPU on promoting the fruit growth of kiwifruit could last for a long time. The most effective period of use is 10-30 days after anthesis, during the rapid growth of the fruit.