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柑桔幼旺树枝叶茂密,徒长性强,花芽分化不良,开花少或完全不开花,因此俗称“公子树”。为了促使这些“公子树”开花结果,应采取以下措施。一、用环剥、环割、断根促花。在8月下旬、9月上旬切断生长较旺的主根,减少对水分的吸收,抑制生长;9月下旬、10月上旬在生长较旺的主枝、侧枝基部环剥1圈或环割1—3圈,阻碍营养物质的运转,增加局部营养的积累,促使环剥、环割部位以上的枝条分化花芽。二、用撑、拉、吊、压枝促花。利用夏季修剪,对离心生长较强的幼旺树的个别骨干枝采取撑、拉、吊、压、平等办法,加大分枝角度,开张树冠改善光照,缓和生长势,促使分化花芽。
Citrus vigorous branches and leafy trees, good long-legged, poor flower bud differentiation, flowering or not blooming, it is commonly known as the “son tree.” In order to promote these “son tree” flowering results, should take the following measures. First, with girdling, ring cutting, cut the root to promote flowers. In late August and early September cut off the growth of the main root of more flourishing, reducing the absorption of water and inhibit growth; late September, early October in the growth of the main branch, 3 laps, hinder the operation of nutrients, increase the accumulation of local nutrients, to promote girdling, ring cutting branches above the division of flower buds. Second, with the support, pull, hanging, pressure sticks to promote flowers. Using summer pruning, the method of supporting, pulling, hanging, pressing and equalizing is adopted on individual backbone branches of the vigorous growth vigorous young tree to increase the branch angle, open the canopy to improve the light, ease the growth potential, and promote the differentiation of flower buds.