Conclusion: Huai Nan Dioscorea Opppsitae,Tie Gan Dioscorea Opppsitae can be used as substitution products for Radix Dioscorea Opppsitae,when the supply of the latter is tight.

• 结论:根据实验结果认为,淮南山药、铁杆山药在怀山药供不应求的时候可作为它的替代品应用。