在黄瓜嫁接栽培中,多以南瓜为砧木,即将黄瓜嫁接在南瓜的下胚轴上。南瓜幼苗的下胚轴是一个中空的管状体,中空部分叫髓腔,四周叫下胚轴壁(图1—1)。下胚轴的横切面为椭圆形,直径长的一方叫长轴,短的一方叫短轴,子叶着生在短轴的两侧 (图1—2)。嫁接时应将接穗接在轴壁上,而不能 Grafted in the cucumber cultivation, mostly pumpkin rootstocks, the cucumber will be grafted on the hypocotyl pumpkin. Hypocotyl pumpkin seedlings is a hollow tubular body, the hollow part of the medullary cavity, surrounded by the hypocotyl called the wall (Figure 1-1). Hypocotyl cross section is oval, long diameter side called the long axis, short side called the short axis, cotyledons born in the short axis on both sides (Figure 1-2). Grafting should be scion attached to the shaft wall, but not