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一、生产中存在的问题及选育目标沙打旺(Astragalus huangneensisFu·et Liu·sp·)原产黄河故道地区,在我国北方普遍表现出耐瘠薄、耐干旱、耐寒冷、抗风沙、产草量高、草质较好等特点。但生育期长,要求较高的活动积温,所以在北方地区不开花或很少开花结实。辽宁省农科院选育的早熟沙打旺虽然具备一定的早熟性和种子丰产性,但是,只有在无霜期135天以上,≥10℃年活动积温高于3000℃的地区种植才能表现出种子的丰产性。我区多数牧区无霜期120天左右,≥10℃
First, the problems in production and breeding objectives Astragalus huangneensisFu · et Liu · sp · native areas of the Yellow River, in the north of our country generally showed resistance to infertility, drought, cold, wind sand, grass production High volume, better quality and so on. However, the long period of growth requires higher activity accumulated temperature, so the flowering in the northern region or seldom flowering. Although the early maturity and seed yield of the breeding of Liaoning Academy of Agricultural Sciences have some premature and high seed yield, but only in the frost-free period of 135 days or more, ≥ 10 ℃ activity accumulated temperature above 3000 ℃ in the region to show seed High yield. Most of my area frost-free period of about 120 days, ≥ 10 ℃