试验证明采用马铃薯二季栽培所获得的块茎,用作春播种薯,可以防止退化并获得较高的产量。不过,在进行二季栽培中,因为新收获的块茎,常常要经过二三个月的长期休眠才能发芽,因此必须事先进行人工催芽,打破块茎的休眠,才能在收获后立即播种和正常发芽。同时,马铃薯的生长期短,春马铃薯在立春前后播种,小满前后收获;秋马铃薯在处暑前后播种,立冬、小雪间收获,各不过七八十天。因为此小麦成熟早,也不影响稻田插秧,不妨碍旱地播种棉花、玉米、高粱和扦插红薯。几年来许多地区都希望一年内播种马铃薯两季。我们认为这是—个增产粮食的跃 Experiments show that the tubers obtained from the second season cultivation of potatoes are used as seeds for sowing in spring and can prevent degradation and obtain higher yield. However, during the second season cultivation, newly harvested tubers often need to go through two to three months of long-term dormancy to germinate. Therefore, artificial germination must be carried out in advance to break the dormancy of the tubers before sowing and sprouting normally after harvest. At the same time, the potato has a short growth period. The spring potato is planted before and after the beginning of spring and is harvested before and after Xiaoman. The autumn potato is planted before and after the summer heat. Because this wheat mature early, does not affect rice transplanting, does not prevent the dry land seeding cotton, corn, sorghum and cuttings sweet potato. In many years, many regions hope to sow two seasons of potatoes in a year. We think this is a jump in grain output