23种草在楚雄至大理高速公路边坡种植2年试验,观测了地上地下生物量、高度、盖度、绿度、密度等。冬春旱寒期绿度先多数温带禾草好于热性禾草,后反之;其中严重旱寒期温带豆科生长势佳但稀疏。豆科初期覆盖不及禾草迅速,但根长且生物量大。密度相关和动态分析表明各相邻期密度两两显著或极显著正相关,密度苗期和雨热盛期不稳定,次年末较稳定但豆科很稀不宜单播。聚成六类,喜温耐旱Ⅱ类草:高羊茅、普通狗牙根、紫羊茅、东非狼尾草、云南知风草、弯叶画眉、云南狼尾草,覆盖快且密、生物量大绿期长,适应性好;其中画眉属的色较差;Ⅵ类:地毯草、细叶结缕草、草地早熟禾、碱茅纤细低矮生长慢生物量盖度最低绿期短不适播种;Ⅰ类中多年生黑麦草和鸭茅宜作先锋种;紫花苜蓿覆盖快盖度较高但稀,红三叶覆盖慢盖度欠佳但密,两者作保护性草种。白三叶、孔颖草湿润凉爽时佳。覆盖迅速且冬春寒旱期适应性强是筛选关键。 Twenty-three species of grass were planted on the slopes of Chuxiong-Dali Expressway for two years. The aboveground and underground biomass, height, cover, greenness and density were observed. Most of the temperate grasses were better than the hot grasses in winter and spring in the frigid period, while the temperate grasses in the severe drought period grew well but were sparse. Leguminosae initially covered less than grass, but the root length and biomass. Density-related and dynamic analysis showed that there was a significant or very significant positive or negative correlation between the density of each adjacent period, the instability of seedling density and temperature, the more stable at the end of next year, but the less frequent legumination should be unicast. Gathered into six categories, temperature and drought Ⅱ grass: tall fescue, common bermudagrass, red fescue, Eastern Africa Pennisetum, Yunnan know wind grass, curved leaf thrush, Yunnan Pennisetum, covering fast and dense, biological Large amount of green long period, good adaptability; Among them, the color of the genus Thrush is poor; Category Ⅵ: Carpet grass, Zoysia matrella, Kentucky bluegrass, Sowing; perennial ryegrass and Dactylis glomerata were the pioneer species in class I; alfalfa covered with high coverage rate but thin but with slow coverage of red clover but less dense, both of them were used as protective grass species. White Clover, Kong Yingcao humid cool good. Rapid coverage and strong adaptability during the winter and cold winter drought is the key screening.