核桃是一种木本油料植物,但有性繁殖很困难,变异性较大,对土壤要求严格。实践证明,采用嫁接繁殖的方法是大力发展核桃的有效措施。枫杨和核桃嫁接的亲合力强,而且枫杨资源丰富,耐瘠薄,抗涝,是一种很好的砧木。枫杨嫁接核桃,生长良好,按后3—5年即可结实,比实生繁殖提早5—6年。在沟谷极为瘠薄的土 Walnut is a woody oil plant, but sexual reproduction is difficult, more variability, demanding on the soil. Practice has proved that the method of grafting propagation is an effective measure to vigorously develop walnut. Maple and walnut grafted affinity strong, and maple Yang rich in resources, resistance to infertility, waterlogging, is a good rootstock. Maple grafted walnut, good growth, according to 3 to 5 years after the sturdy, 5 to 6 years earlier than the real breeding. Very barren soil in the valley