1前言马铃薯是粮、菜、饲兼用的高产作物，也是我省主要的春粮作物之一。在1990年以前，我省春马铃薯的种植面积在1．4～2．0万hm2之间，单产水平也较低；1990年种植面积第一次超过3．3万hm2，此后每年以平均10％以卜速度递增（表1）。至1997年，全省春马铃薯种植面积达到6．67 1 Introduction Potato, food, feed and high-yield crops, is also one of the major spring crops in our province. Before 1990, the planting area of ​​spring potato in our province ranged from 1.4 to 2.0 million hm2 and the yield per plant was also low. The area planted in 1990 exceeded 33,000 hm2 for the first time, % At increasing speed (Table 1). By 1997, the province’s spring potato planting area reached 6.67