甘南牧区地处青藏高原东端边缘向黄土高原过渡的地带,这里主要经营畜牧业。多年来为了缓和草畜矛盾,各县曾由外地引进了许多种(品种)优良牧草和饲料作物进行试种,但由于寒冷的气候条件而收效甚微,有些草种即使在小面积引种成功,但种子不能成熟,草种问题无法解决,仍难以大面种播种。目前可资建立多年生人工草地的理想草种只有垂穗披碱草(Elymus nutans)和老芒麦(Elymussibiricus)两种。因此,对于当地野生优良 Gannan pasture is located in the eastern edge of the Qinghai-Tibet Plateau to the Loess Plateau transition zone, where the main business of animal husbandry. Over the years in order to ease the contradiction between grass and livestock, the county has introduced from the field a variety of (species) fine forage and forage crops for planting, but due to cold climatic conditions and little effect, even some species introduced in a small area success, However, the seeds can not mature, the problem of grazing can not be solved, and it is still hard to sow the seeds. At present, only two species of Elymus nutans and Elymussibiricus are the ideal grasses for perennial artificial grassland. So for the local wild good