扁穗冰草〔Agropyron cristatum L.〕为多年生旱生草本植物,广泛分布于世界干旱和半干旱地区。在我国主要分布于温带的西北、东北各省区,是改良干旱、半干旱天然草地的重要牧草之一。我省河西半荒漠地区的牧业区、天然草地的牧草种类贫乏,随着畜牧生产的发展, Agropyron cristatum L., a perennial herbaceous plant, is widely distributed in arid and semi-arid regions of the world. In our country is mainly located in the temperate northwest, northeastern provinces, is to improve the arid, semi-arid natural grassland one of the important forage. In the pastoral area in the semi-desert area of ​​Hexi, the forage species in natural grassland is poor. With the development of livestock production,