河西走廊沙地马铃薯新品种引种比较试验OA

In order to select new potato varieties suitable for planting in the Hexi Corridor and to promote the high-quality development of the sandy-land potato industry,an introduction and comparative experiment was conducted using an integrated cultiva-tion model of one ridge,one belt,two rows with white plastic film mulching and drip fertigation.The locally cultivated variety Wotu 5 was used as the control,and nine introduced potato varieties,namely Qingshu 9,Qingshu 10,Xisen 6,Jizhangshu 12,V7,Longshu 7,Longshu 10,Longshu 20,and Longshu 22,were evaluated.Results showed that the highest yield was observed in Xisen 6 with 6 7 800kg/ha which was significantly 3.91%higher than that of the control variety Wotu 5.Jizhangshu 12 and Qingshu 9 also showed relatively high yields,at 65 950 and 65 550 kg/ha,respectively,representing increases of 1.07%and 0.46%over the control,respec-tively.The remaining varieties all showed yield reductions compared with Wotu 5.There were great differences in the growth period among tested varieties,and late-maturing and medium-late-maturing varieties exhibited significantly better disease resistance than medium-early and medium-maturing varieties.Traits such as stem color,leaf color,tuber uniformity,skin type,and eye depth showed little variation,whereas traits such as crown color,number of main stems,plant height,stem thickness,tuber shape,skin color,and flesh color varied greatly.Qingshu 9,Xisen 6,and Jizhangshu 12 performed well in plant traits,tuber traits,and disease resistance,and their overall performance was superior to that of the control variety Wotu 5.In terms of nutritional quality,Longshu 22 had the highest starch content and dry matter content,at 209.0 and 283.0 g/kg,respectively,but its equivalent yield was only 44 950 kg/ha.Qingshu 9 had starch and dry matter contents second only to Longshu 22,but its yield was significantly higher,and no diseases were observed in the field,indicating strong disease resistance.Considering all factors,Qingshu 9 is recommended as a starch-processing variety for sandy land in the Hexi Corridor,while Xisen 6 and Jizhangshu 12,which showed good high-yield performance,strong dis-ease resistance,and shorter growth periods,can be promoted as alternative varieties to replace the locally cultivated variety Wotu 5.