为筛选适宜陇东旱塬复种的马铃薯优良品种，以当地主栽品种夏波蒂作为中早熟组对照品种、庄薯3号为晚熟组对照品种，对冬油菜茬复种的23个马铃薯新品种的生育期、产量等指标进行分析。结果表明，冀张薯12号、红美、14w-5折合产量分别为30 487.5、27 115.3、26 448.4 kg/hm2，较对照品种夏波蒂分别增产36.3%、21.3%、18.2%，生育期85~89 d，可作为当地油菜茬复种马铃薯的中早熟品种；青薯9号、青薯10号、陇薯7号折合产量分别为27 782.4、27 615.6、26 462.2 kg/hm2，较对照品种庄薯3号分别增产39.2%、38.4%，32.6%，生育期99~104 d，可作为复种马铃薯晚熟品种。

Selecting the excellent varieties of multiple-cropping potato is the key factor to promote the application of multiple-cropping potatoes technology in Loess Plateau of Eastern Gansu Province. This study analyzed the growth period， yield， and other indexes of 23 new winter rape-potato varities. The local main cultivar Shapoti was used as the control variety for the mid-early maturity group， and Zhuangshu 3 was the control variety for the late maturity group . The results showed that，the yield of mid-early maturing varieties Jizhangshu 12、 Hongmei and 14W-5 were 30 487.5 kg/hm2、 27 115.3 kg/hm2、 26 448.4 kg/hm2 with a growth period of 85～89 days， compared with the control， the yield increased by 36.3%， 21.3% and 18.2%， respectively， which could be considered as the excellent varieties of winter rape-potatoes multiple cropping varieties； The yield of late maturing varieties Qingshu 9， Qingshu 10 and Longshu 7 were 27 782.4 kg/hm2、 27 615.6 kg/hm2、 26 462.2 kg/hm2， respectively， with a growth period is 99～104 days， compared with the control， the yield increased by 39.2%， 38.4% and 32.6%， respectively， which could be used as the first choice for late-maturing potato varieties.

S344.3；S532

国家土壤质量数据中心观测监测任务(ZX02S280900)；国家农业环境数据中心观测监测任务(ZX02S2809)；庆阳市科技计划项目(QY2021A-N006)。