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山梨砧木苗必须切断主根,发生一定数量侧根才能用于嫁接,培育出合格的成品苗。生产上延用的断根方法有两种:一是畦播移床。这种方法断根效果好,但必须有灌水条件,而且费工时,成本高;另一种方法是垅播就地断根。此方法可以不灌水,也较省工,但是断根深度不易掌握,断根率低,出圃时根系合格的成品苗很低。因此,我们探讨了断根方法。初步研究结果证明:用长芽播种育成的砧木苗断根率达到75％以上,发生侧根的数量和粗度均于畦播移床苗标准接近。
Ya-Li rootstock seedlings must be cut off the main root, a certain number of lateral roots can be used for grafting, cultivate qualified finished seedlings. There are two ways to extend the use of the root of the production: First, 畦 broadcast bed. This method has a good root-breaking effect, but must have irrigation conditions, and the time-consuming and costly; the other method is to cut the roots in place. This method can not irrigation, but also more labor-saving, but not easy to grasp the root depth, root cut rate is low, when the root nursery finished product seedlings is very low. Therefore, we explored the root-breaking method. Preliminary results show that: rootstock seedlings planted with long buds broke the rooting rate of 75% or more, the number of lateral roots and the roughness occurred in the standard of 畦 sowing bed seedlings close.