苜蓿是优良豆科多年生草本植物，是目前全球广泛种植的优良牧草。
Alfalfa is an excellent perennial leguminous grass, which is widely planted in the world.
为解决高寒牧区冬季家畜补饲需要，进行了优良牧草的引种栽培及生产性能的研究。
Studies on introduction and cultivation as well as productiveness of fine forages were carried out in order to solve supplementary problem of forage at winter season in alpine region.
长期重度放牧使高寒灌丛群落结构简化，地上现存生物量特别是优良牧草的现存量减少。
Long - term heavy grazing simplified the alpine shrub community and decreased the standing above - ground biomass, especially palatable herbage plants.
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