At the stage of tuberization to tuber-expanding, the growth of leaves, stalks and tubers reached the maximum.

茎形茎膨大始期，阶段吸硫量和吸硫速率均达最大值，熟收获降最低值。

To screen whether there is starch synthesis within stolon before occurrence of tuberization, one way to do so is to check amylase activities during stolon growing.

摘要测定匍匐茎内淀粉酶活力否存在及其变定马铃薯葡萄茎内否有淀粉合发生的途径之一。