利用银杏苗出圃后,挖出遗留在地里的残根作砧木进行嫁接育苗,成活率为90％。每亩以8000株苗出圃,其遗留根每株可接5棵嫁接苗,每亩可接4万株苗。当年生长达25厘米,第二年平均高75厘米左右,5-6个分枝,移栽定植效果很好。 苗床 苗床应选在开阔地段的砂壤土,pH7左右。冬至前施足基肥。翌年立春后,整地、清除杂草。每亩施呋哺丹1公斤进行土壤消毒。开沟做畦,畦高20厘米,宽40厘米。苗圃周围开排水沟,防止积水。 接穗 接穗应选择腋芽饱满,1—2年生的休眠枝条,留有2个芽,在下方削成斜面,长约3厘米,在另一面下端削成0.5厘米的小斜面。 砧木 银杏出圃留下的根挖出作砧木,用清水洗净泥土,剪成10厘米长的根段,注意不要损坏须根,每50 Ginkgo biloba out of nursery, dug left in the ground as rootstock rootstock grafting, seedling survival rate of 90%. 8000 acres of nursery plants per acre, the remaining roots of each plant can receive 5 grafted seedlings per acre can pick up 40,000 seedlings. Growing up to 25 cm, the second year an average of about 75 cm high, 5-6 branches, transplanting planting good effect. Seedbed should be selected in the open area of ​​sandy loam soil, pH7 or so. Shizujifei foot before winter fertilizer. The following year after the beginning of spring, soil preparation, remove weeds. 1 kg per acre Fudan Dan soil disinfection. Trenches do 畦, 畦 height 20 cm, width 40 cm. Drainage around the nursery to prevent water. Scion scion should be full of axillary buds, 1-2 year-old dormant branches, leaving two buds, cut into bevels below, about 3 cm in length, the other side of the lower end cut into small bevels 0.5 cm. Rootstock Ginkgo biloba left root excavated rootstock, wash the soil with water, cut into 10 cm long roots, be careful not to damage the fibrous roots, every 50