马铃薯在我国种植有着悠久的历史，全国各地均有种植，尤其近几年来，由于科学技术在马铃薯作物上的应用，使马铃薯产量直线上升，种植面积逐年扩大。但是，在南方部分地区由于种薯必须经过比较长时间高温条件下贮藏，次年春播种植往往出现“次生块茎”，不出苗或植株明显矮化? The cultivation of potatoes in our country has a long history and is planted throughout the country. In recent years, due to the application of science and technology to potato crops, the output of potato has risen linearly and the area under cultivation has expanded year by year. However, in some areas in the south, because the seed potato must be stored under relatively high temperature for a long time, the planting of the secondary spring often shows “secondary tubers” in the next year, and does not emerge or the plants obviously dwarf?