本文介绍了1984年从吉林引入到河西走廊地区改良盐土的先锋牧草——碱茅草后所取得的效益。由于碱茅草能在耕层含盐量1.09～5.24％的盐土上出苗,并形成绿色草地,其耐盐能力强于紫苜蓿、星星草、草木樨等。营养成分丰富,适口性强。三年生碱茅草亩产鲜草600公斤,种子23.5公斤,土壤耕层脱盐率达77.0％,土壤自然含水率提高10％,孔隙度增加6.2％,容重降0.169/cm~3,总团聚体增24.2％,pH从8.5降到8.2,改良效益十分明显。 This article describes the benefits that the pioneer forage - soda thatch introduced into Hexi Corridor from Jilin in 1984. As the alkali thatch seedlings in the salt content of 1.09 ~ 5.24% of the topsoil on the seedling emergence, and the formation of green grassland, its salt tolerance is stronger than purple alfalfa, Aster grass, grass mulberry and so on. Rich in nutrients, palatability and strong. Trichosanthes grass per mu yield of fresh grass 600 kilograms, seed 23.5 kilograms, soil plow rate of 77.0%, natural soil moisture increased by 10%, porosity increased 6.2%, bulk density decreased 0.169 / cm ~ 3, total aggregate increased 24.2%, pH dropped from 8.5 to 8.2, the improvement benefit is very obvious.