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红松具有分杈的习性。据观察,产生分杈的原因是多种的,如由双顶芽引起的分杈,或由同年的顶芽和侧芽引起的分杈,或因受病虫害、冻害和机械损伤而引起的分杈,但主要原因是因生理成熟引起的。因为红松达到生理成熟时,主枝顶芽下方开始开花结实,结实的特点是轮状排列数个或十几个不等。这样使水分、养分大部分集中在果实上,使顶芽生长受到抑制。另外,为了适应大球果的生长,达到生理负荷的应力要求,果枝横(径)向生长大于纵(高)向生长。这样连续结实的结果,就使顶芽生长衰弱。这时位于果实下方的第一轮侧枝却迅速生长起来,进一步影响顶芽生长,使之逐步枯萎,从而造成红松主干分杈。
Korean pine has the habit of bifurcation. It has been observed that bifurcations are produced for a variety of reasons, such as bifurcation caused by double-headed buds or bifurcations caused by top buds and lateral buds of the same year or bifurcation caused by pests, frost damage and mechanical damage , But the main reason is due to physiological maturity caused. Because of the physiological maturity of the Korean pine, the top of the main top bud began to bloom sturdy, sturdy features are arranged in a few rounds or a dozen range. This water, nutrients are mostly concentrated in the fruit, so that the top bud growth inhibition. In addition, in order to adapt to the growth of cones and to meet the stress requirements of physiological load, the growth of fruiting branches is greater than that of vertical (high) growth. The result of this continuous strong, so that the top bud weakening. At this time, the first round of collateral at the bottom of the fruit rapidly grew up, further affecting the growth of the top bud, causing it to gradually wilt, thereby causing the main branch of Korean pine.