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在澳大利亚的塔斯马尼亚地区,以实生苗为砧木的红元帅系苹果,因生长过旺,造成树体高大,树冠郁闭,不仅不利于管理,而且座果不匀,果实个小且着色差,使果实质量下降。虽然修剪可以对树体进行调整,但单纯重剪树势更强。为使树体大小能长期保持且易于管理,拟用一些化学生长调节剂来抑制树体过旺生长。为了确定生长抑制剂 PP333是否能抑制重剪后的树体生长,使树体大小保持易于管理,而对果实大小和形状没有不利的影响,用 PP333和 B_9对红元帅系苹果大树进行处理试验。1983—1984年的试验结果表明;虽然处理前减小了树冠总体积,但各处理后的产量仍较高,以果数/树干面积(cm~2)为产量指标各处理间差异不显
In Tasmania, Australia, the Red Marshal, an apple with seedlings as a seedling, is overgrown due to overgrowth, resulting in a tall tree with closed canopy, which is not only unfavorable to management, but also has uneven fruits and small fruits Coloring poor, so that the quality of the fruit. Although pruning can make adjustments to the tree, pruning is more powerful. In order to keep the size of the tree long-term and easy to manage, it is proposed to use some chemical growth regulators to inhibit tree over-growth. In order to determine whether the growth inhibitor PP333 can inhibit the growth of the tree after re-shearing, the size of the tree can be easily managed without adversely affecting the size and shape of the fruit, the treatment of the apple tree with red metaphysics by PP333 and B_9 . The experimental results from 1983 to 1984 showed that although the total canopy volume was reduced before treatment, the yield of each treatment was still high. The difference of the number of fruit / trunk area (cm ~ 2)