多叶老芒麦是禾本科披碱草属多年生牧草,是采用选择育种的方法培育成的一个高产、优质、适宜青海高寒牧区栽培的牧草新品种。一九七一年,我们在同德牧场对上一年播种的披碱草和老芒麦的整个生育期进行详细观察记载的过程中,发现有的株丛性状表现特殊,及时作了标记,在抽穗和成熟期间又作了细致的考察。这些株丛足有返青早、分蘖能力强、生长迅速、叶片特多、叶量大、植株高、抗逆性强、根系发达等与“众”不同的特点。当年在田间将这些株丛进行单 Eupolyphaga is a perennial forage grass belonging to the grass family Elymus, and is a new forage cultivar cultivated in the pasturing area of ​​Qinghai alpine highland with high yield, high quality and breeding by selective breeding. In the process of carrying out detailed observation and records of the entire growth period of Elymus sibiricus and Siberian barley planted in the past year in Tongde Ranch in 1971, we found that some of the plant-line traits exhibited special and timely markings, During the heading and maturity and made a detailed study. These plants have plenty of features such as early greening, strong tillering ability, rapid growth, special leaves, large leaf mass, high plant height, strong resistance, well-developed root system, etc. That year in the field of these strains Cong single