1.为了提高水果在市场上的竞争力,有时须对果园中一些竞争力不强的品种或实生树进行更新。一种更新办法是砍掉老树重栽,这不仅费工费力,而且延迟结果。如果将良种接穗高接在老树上,则既能更新品种,又可尽快结果,实为果树更新换代的捷径。 1. In order to improve the competitiveness of fruits in the market, it is sometimes necessary to update some of the less competitive varieties or live trees in the orchard. One way to do this is to cut down trees and replant them, which is not only laborious but also delays the outcome. If the elite scion tall take the old tree, both to update the species, but also as soon as possible the result, in fact, a shortcut to the replacement of fruit trees.