山药 (又名淮山、白山药、山薯蓣等 )以块状茎入药，有健脾养胃、补肺养肾、益精止泻、滋养健身等功效，其柱状根茎又是广大群众喜食的薯蓣类蔬菜。因此，在我国南北广大地区均有栽培。现将其栽培技术介绍如下： 　　一、选地整地：选择土层深厚、疏松和排水良好的砂壤土、壤土 Yam (also known as yam, white yam, yam, etc.) to the tuberous medicine, spleen Yangwei, Bufei Yangshen, Yijing Zhixie, nourishing and fitness and other effects, the columnar rhizome is the majority of the masses eat Yam vegetables. Therefore, in our vast area of ​​North and South have cultivated. Now its cultivation techniques are introduced as follows: First, the election site preparation: Select soil deep, loose and well drained sandy loam, loam