富士苹果的幼树具有树体生长快,新梢停止生长晚的特点,不利早结果和早丰产。为此我们对3—5年生的幼旺树进行喷布乙烯利与B_9混合液的试验,结果表明,对控制幼树冠积,提高枝芽萌发率,改变枝类比,促进花芽形成等方面均有明显效果。在6月中旬喷布,当年即可收到较好的效果,如在8月下旬喷布,效果则表现在翌年。乙烯利为北京农药二厂生产的40％水溶液,配成400ppm The young tree of Fuji apple has the characteristics of fast growth of the tree body, stopping of the shoot growth late, adverse early result and early yield. To this end, we test the mixture of ethephon and B_9 on 3-5 year-old young trees. The results showed that there is a significant effect on controlling the crown plot, increasing the germination rate of branch buds, changing the branch ratio and promoting flower bud formation Obvious effect. Sprayed in mid-June, the year can receive better results, such as in late August spray, the effect is reflected in the following year. Ethephon Beijing Pesticide Plant 40% of the 40% aqueous solution, dubbed 400ppm