下面的不发芽,因为大部分树都有个毛病。就是上面发芽的地方产生一种抑制发芽的荷尔蒙。这荷尔蒙顺着地心引力往下走。因此越下面的,就越不发芽了。:)
下面的不发芽,因为大部分树都有个毛病。就是上面发芽的地方产生一种抑制发芽的荷尔蒙。这荷尔蒙顺着地心引力往下走。因此越下面的,就越不发芽了。:)
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