北京山区有很多野生核桃楸,果实少而小,壳厚仁少,无经济价值。但根系发达,耐旱耐寒力强,为嫁接核桃的良好砧木。利用嫁接法繁殖核桃,生长快,2—3年即挂果。能克服种子繁殖结果晚、品质变劣的缺点。嫁接技术要点如下:1.嫁接时期:核桃楸展叶后即可进行嫁 There are many wild Juglans mandshurica in the mountainous area of ​​Beijing, the fruit is small and small, the shell is thick, with few economic value. However, the developed root system, drought and strong cold, good grafting walnut rootstock. The use of graft propagation of walnut, grow fast, 2 to 3 years that fruiting. Can overcome the shortcomings of the late breeding results, poor quality. Grafting techniques are as follows: 1. Grafting period: Juglans mandshurica leaf after the marriage