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川草１号老芒麦（ＥｌｙｍｕｓｓｉｂｉｒｃｕｓＬ．ｃｖ．ｃｈｕａｎｃａｏＮｏ．１）（原品系编号为８０２３２０下同）是根据我所１９８０年拟定的禾草育种计划以川西北高原寒温气候地区（若尔盖高原为主）为育种服务区域，用阿坝县本地老芒麦为育种原始材料，以提高产草量、叶量率，延长利用年限，播种当年生长迅速和选育需肥水平低的品种为育种目标，应用系统选择方法育成的优良品种。自１９８０年选单株开始经历了“选单株－株系－系统－品比－生产试验和多点示范”等育种程序。育成的８０２３２０老芒麦，主要经济性状和枝条生长特点与原始群体有较大差异，表现为苗期叶片宽短，叶色较淡，株丛整齐，株高较原始材料高５厘米，总枝条数多４５．６％，并且具有原始材料所没有的“短根茎”。育成品种的产草量，利用年限，播种当年生长状况和适应性以及需肥水平等，均达到了育种的预期目标。在川西北高原普通生产条件下，年产风干草可达７５００ｋｇ／公顷，较之本地原有老芒麦增产２１％以上，最高可达４０％左右。在同一栽培条件下年度间增产率相当稳定，（Ｓ＝±３．７％）。且因需肥水平低，在高原平坝草场普遍可以种植，亦可在省内山地温带气候地区种植。目前已在红原、松潘、壤塘、若尔盖等县?
Elymus sibiricus L.cv.chuancaoNo.1 (the same as original strain No. 802320) is based on the grass breeding program formulated in 1980 by the cold climate zone in the northwestern Sichuan Plateau ) For the breeding service area, with the local Abalone native Siberian maize breeding material for the purpose of increasing the amount of grass, leaf rate, to extend the useful life of sowing the rapid growth of the year and breed needs low level of fertilizer for breeding objectives, application System selection method bred of fine varieties. Since 1980, the single plant has undergone breeding programs such as “Plant-strain-system-product ratio-production test and multi-point demonstration”. The main economic traits and growth characteristics of the 802320 old Siberian poplar cultivated are quite different from the original group, which is characterized by short leaf width, lighter leaf color, neat plant lines and a height of 5 cm higher than the original material. The total shoots 45.6% more, with “short rhizomes” not found in the original material. Breeding varieties of grass yield, the use of years, sowing the current year’s growth and adaptability and the need for fertilizer levels, have reached the expected goal of breeding. Under the normal production conditions in the northwestern Sichuan Plateau, annual output of hay can reach 7500kg / ha, which is about 40% higher than that of the original local sage grown by more than 21%. During the same cultivation year, the increase rate was quite stable (S = ± 3.7%). And due to the low level of fertilizer needed, it is generally planted in the plateau pasture and can also be planted in mountainous and temperate climates in the province. Currently in the red, Songpan, soil pond, Ruoergai and other counties?