1.选用早熟、高产及退化轻的品种从景宁县多年的试验、示范结果来看,马铃薯综合性状北方品种比本地品种好,高山种薯比低山的好。北方品种以东农303、克新3号、郑薯85-2和金冠等品种表现较好,一般比本地种增产17.5%～38.4%。其中东农303为特早熟品种,具有株型紧凑、早熟、优质、高产的特点,适、宜作蔬菜早熟栽培。其次是金冠,同样具有早熟、优质、商品率高等优点。本地高山留种的种薯退化轻,一般比低山自留种薯增产15.6%～21.3%。因此,建立高山繁种基地,既可以从高纬度地区引入小量的原种进行繁殖推广,又可以对当地品种进行提纯复壮,减轻 1. Selection of precocious, high yield and degenerate light varieties from Jingning County for many years of experiments, demonstration results, the northern hybrid varieties than the local varieties of good, high mountain seed than low mountain. The varieties of Dongnong 303, Kexin 3, Zhengshu 85-2 and Golden Delicious performed well in the northern varieties, which increased by 17.5% ~ 38.4% than the native ones. Among them, Dongnong 303 is a special precocious variety, which has the characteristics of compact plant type, early maturity, high quality and high yield, suitable and suitable for early maturing vegetables. Followed by the Golden Delicious, also has the precocious, high-quality, high commodity rate advantages. The local alpine seed-seeded species degenerated slightly, generally yielding 15.6% to 21.3% more than the low-lying species. Therefore, the establishment of mountainous breeding base can not only introduce a small amount of original species from high latitude areas for breeding and promotion, but also can purify, rejuvenate and reduce local varieties