Comparative Experiment of Starch Processing Potato Varieties in Zhangye City

In order to select the high quality starch processing potato varieties which can be planted in Zhangye City, eight starch processing potato varieties were compared for their biological character'adaptability'yield and marketability. The results showed that growth period of the eight varieties were 104-141 days that are within the local frost-free period. The yield of 'Qingshu 9' and 'Qingshu 2' were higher than other varieties, and when compared with 'Atlantic'(control), tuber yield of the two varieties increased by 57.2% and 38.8%, and starch yield increased by 2 09 1kg/ha and 1615 kg/ha, respectively. So 'Qingshu 9' and 'Qingshu 2' could be regarded as candidate varieties for starch processing in Zhangye City.