Paulownia growing very rapidly, more than 10 years of age Paulownia than twice the diameter of the same age, poplar, but a long time to grow, will appear hollow tree trunk.

 
  • 泡桐生长非常迅速,十几年树龄的泡桐要比同龄杨树直径大一倍,但生长时间长了,树干会出现中空。
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