前言马铃薯秋播留种能减缓退化,提高产量,这是科学实验和大田生产证实了的。但是,农民很少采用秋薯留种,主要是秋季无霜期短,特别是中高山区春薯收获迟,秋直播发芽慢,出苗迟,烂薯多,缺苗重,浸种 Preface The autumn planting of potato can slow down the degradation and increase the yield, which is confirmed by scientific experiments and field production. However, peasants seldom used the species of autumn potato to keep their seeds, mainly due to the short frost-free period in autumn, especially the late harvest of spring potatoes in mid-high mountains, slow germination in autumn, late emergence, rotten potato,