一、概述老芒麦(Elymus sibiricus L.)是在北半球寒温带分布较广的一种野生牧草,它常见于苏联的东南部、欧洲部分、西伯利亚、远东、哈萨克斯坦以及蒙古、日本、中国。在我国东北、内蒙古、甘肃、青海、新疆、西藏等省(自治区)的草甸草原地带均常见有分布。它多生于山麓、河谷、低湿滩地、阶地和林缘地带,在有的地段形成优势种。 I. Overview Elymus sibiricus L. is a wild foraminifer widely distributed in the northern hemisphere in the temperate zone. It is common in the southeastern part of the Soviet Union, the European part, Siberia, the Far East, Kazakhstan, Mongolia, Japan and China. In northeastern China, Inner Mongolia, Gansu, Qinghai, Xinjiang, Tibet and other provinces (autonomous regions) meadow grassland are common distribution. It is more born in the foothills, valleys, low wetlands, terraces and forest margins, in some areas to form the dominant species.