一、采用优良品种:良种是增产的基础。旨在选出适合干旱地区种植的高产、优质、适应性强、抗旱、抗病的洋芋品种,供大面积推广利用。共引进品种(系)30个,在本所川旱地种植进行观察、品种比较试验,经过90、91、92、93四年比较。居第一、二位的是青薯168,高原8号两个品种。青薯168三年平均产量1698.9公斤,增产31.1％,味香,适口性好、抗旱、病轻(病株1.95％、病薯2.5％),耐贮藏,已大面积推广。高原8 First, the use of fine varieties: improved varieties is the basis for production. The aim is to select suitable high-yielding, high-quality, adaptable, drought-resistant and disease-resistant potato varieties suitable for planting in arid areas for large-scale popularization and utilization. A total of 30 varieties (lines) were introduced and cultivated in the Hokkaido dry land for observation and comparison of varieties. After 90,91,92,93 years of comparison, Habitat first, second place is sweet potato 168, plateau 8 two varieties. The average yield of sweet potato 168 in three years was 1698.9 kg, an increase of 31.1%. The flavor and palatability of the sweet potato 168 was good. Drought and disease were mild (1.95% of diseased plants and 2.5% of diseased plants), resistant to storage and had been widely popularized. Plateau 8