吉林省是世界三大苏打盐碱土分布区之一,西部盐碱地面积约为96.9万hm~2,其中轻度、中度和高度盐碱地所占比例分别为6.26%、47.90%和45.84%~([1])。研究表明,黑麦草具有一定的抗盐碱胁迫能力,在盐碱地种植黑麦草不但可改良盐碱地,而且可为畜禽饲养提供更多的饲草资源。目前关于黑麦草抗盐碱胁迫的研究多为单一的盐或碱胁迫,混合盐 Jilin Province is one of the three soda saline-alkali soil distribution areas in the world. The saline-alkali soil area in western China is about 969,000 hm 2, with the proportions of mild, moderate and high saline-alkali lands being 6.26%, 47.90% and 45.84%, respectively ([ 1]). Studies have shown that ryegrass has some ability to resist salt and alkali stress, planting ryegrass in saline and alkali soil can not only improve the saline-alkali soil, but also provide more forage resources for livestock and poultry breeding. At present, the research on the anti-saline-alkali stress of ryegrass is single salt or alkali stress, mixed salt