一、问题和目标沙打旺(Astragalus huangheensis Fu.et Liu.sp.)原产于我国黄河故道地区,是豆科黄芪属多年生草本植物。七十年代初,北方地区开始引种试验,普遍表现出耐瘠薄、耐干旱、抗寒冷、抗风砂、产量高、草质较好等特点。但是,由于它在原产地长期适应环境条件的结果,形成了较长的生育期(170—180天)和较高的活动积温(3500—4000℃以上),引到北方地区后普遍感到生育期不够,积温不足,表现为不能或很少 First, the problem and goals Astragalus (Astragalus huangheensis Fu.et Liu.sp.) Originated in China’s old course of the Yellow River, Astragalus Leguminosae is a perennial herb. In the early 1970s, the northern part of the country began the introduction of tests that generally showed resistance to infertility, drought resistance, cold resistance, wind sand resistance, high yield and good grass quality. However, as a result of its long-term adaptation to environmental conditions in its place of origin, a longer period of growth (170-180 days) and a higher accumulated activity (3500-4000 ° C) have been formed. Not enough, lack of accumulated temperature, manifested as not or rarely