在建立华北落叶松种子园的实践中,我们学习国内外嫁接经验,进行了髓心形成层嫁接、套接、侧接、劈接、芽接等多种方法的试验,同时结合当地情况摸索和试用了双形成层对接的方法。经过对比,证明双形成层对接法是一种多快好省且成活率较高的方法。这种方法的主要特点是接穗与砧木均切削到形成层部位,虽不及髓心接触形成层面积大,但 In the practice of establishing Larix principis-rupprechtii seed orchard, we have studied the grafting experience both at home and abroad, and experimented with many methods such as grafting, socketing, side-by-side, cleavage and budding of pith center formation layer, A double formation of the docking method. After comparison, it is proved that double formation layer docking method is a method that is more efficient and more efficient and has higher survival rate. The main feature of this method is that both the scion and the rootstock are cut into the cambium. Although the cambium contact area is not large,