高接是指在树体较高部位进行嫁接的方法,生产实践中常用来更换品种,也是科研中快速鉴定品种的一种手段,日本近些年苹果新品种的推广速度极快,其重要手段之一就是广泛采用高接换头.以成龄老品种植株为砧树,嫁接优良品种,接后树冠扩大迅速,3～4年内,便可恢复原 High access refers to the higher part of the tree grafting method, commonly used in production practice to replace the species, but also rapid identification of scientific research species as a means of Japan in recent years, the promotion of new varieties of apple fast, and its an important means One is the widespread use of high interchangeable head to plant varieties of old trees as anvil, grafted varieties, then the rapid expansion of the crown, 3 to 4 years, will be able to restore the original