多年生黑麦草是世界温带地区最重要的禾本科牧草,原产于西南欧、北非及亚洲西南。目前在我国,该草主要分布在华中、华东及西南地区,在江苏、浙江、湖南、四川、云贵高原等地都已大面积种植,其生长良好,在北 Perennial ryegrass is the most important gramineous pasture in temperate regions of the world, native to Southwest Europe, North Africa and Southwest Asia. At present in our country, the grass is mainly distributed in Central China, East China and Southwest China, and has been planted in large areas in Jiangsu, Zhejiang, Hunan, Sichuan and Yunnan-Guizhou Plateau. The grass grows well in the north