1. At the stage of tuberization to tuber-expanding, the growth of leaves, stalks and tubers reached the maximum.
   块茎形成到块茎膨大始期，阶段吸硫量和吸硫速率均达到最大值，成熟收获时降到最低值。
2. 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是否存在及其变化是鉴定马铃薯葡萄茎内是否有淀粉合成发生的途径之一。

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