穿龙薯蓣 (Dioscoreanipponica)是无性繁殖能力较强的多年生缠绕性草本植物。通过根茎的芽痕及其不均匀性可以判别其年龄和单株寿命。穿龙薯蓣无性繁殖的正交试验研究结果表明 :根茎的年龄是影响生根率的最关键因素。 1～ 2龄最易生根 ,不仅生根率高 (82 % ) ,而且根系的发育也较好 ,是实现人工扩繁的最佳材料。ABT生根粉对促进生根有一定影响 ,特别对根系的发育影响较大 ,但对生根率的影响不显著。穿龙薯蓣的无性人工繁殖不采用药剂处理即可达到良好的效果 ,其根茎薯蓣皂甙元的含量不受年龄的影响 ,这有利于自然条件下持续更新利用 Dioscoreanipponica is a perennial wintering herbaceous with strong reproductive capacity. Through the rhizomes bud trace and its inhomogeneity can determine its age and single life. The results of orthogonal test of asexual reproduction of Azadamizocarpus japonicus showed that the age of rhizome was the most critical factor affecting rooting rate. The best rooting age is 1 ~ 2 years old, which not only has high rooting rate (82%), but also has good root system development. It is the best material for artificial propagation. ABT rooting powder to promote rooting have a certain impact, especially on the development of the root larger, but the rooting rate was not significant. Asexual reproduction of Dioscorea nipponica does not use the chemical treatment to achieve good results, the content of its root diosgenin is not affected by age, which is conducive to continuous use and update under natural conditions