树桩生长大都具有顶端优势的现象,特别是那些高大的乔木类树种(如松柏等),它们在营养生长过程中表现尤甚。它们的寿命可达几百年或上百年,即使到了生殖生长期,这种顶端优势仍然存在。它首先表现在树木本身的最顶端,其次表现在侧枝顶端。其中哪一个枝干强壮,它的顶端优势表现就明显。这种顶端优势对老桩嫁接来说,有利也有弊。 Stump growth mostly has the top advantage of the phenomenon, especially those tall tree species (such as pine and cypress), they are particularly in vegetative growth process. Their lifespan can be hundreds or hundreds of years, and even at the reproductive stage this top advantage still exists. It first appears in the top of the tree itself, followed by the top of the branch. Which one stem strong, its top performance is obvious. This top advantage of the old pile grafting, there are advantages and disadvantages.