宁浪彝族自治县地处高寒山区,每年种植马铃薯12万余亩,几百年来长期使用的老品种严重退化,折合主粮平均单产只有158斤。前几年推广了抗病良种“克疫”、“阿坝”(即新疆洋芋)等品种,单产达215斤。有一万余亩单产达400—800斤。最高亩产达1323斤。近年来由于选种保纯跟不上,只作一般块选,加之轮作、连作中的隔年马铃薯混杂以及保管中的混杂使高产种产量降低,与本地品种相差不大。据调查,混杂种“阿坝”一窝只收0.8—1.5斤,而纯种“阿坝”一窝可收3—5斤。为了恢复良种的高产性能,近年来采用株选留种提纯措施,收到很 Ninglang Yi Autonomous County is located in the alpine mountains, planting more than 120,000 acres of potatoes every year for several hundred years the long-term use of the old varieties seriously degenerated, equivalent to staple grain yield only 158 kg. A few years ago to promote the disease-resistant seed “grams of disease”, “Aba” (Xinjiang Xinjiang potato) and other varieties, yield of 215 pounds. There are more than 10,000 acres yield 400-800 pounds. The highest yield of 1323 pounds. In recent years, due to the selection of pure Paul can not keep up, only for the general block election, coupled with rotation, continuous cropping potato hybrid and custody in the hybrid to reduce high-yielding varieties, with little difference between the local varieties. According to the survey, the hybrid “Aba” sow only received 0.8-1.5 pounds, while the purebred “Aba” litter can receive 3-5 pounds. In order to restore high-yielding performance of elite, in recent years, the use of strains to stay species purification, received very