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以定西为中心的中部干旱、半干旱区是我省水土流失最严重的区域,也是我省种草种树,荒山绿化和水土保持工作的重点区。近年来,随着农村产业结构逐渐合理化调整和水土保持工作的不断深入进行,使耕地和大面积的荒山种草有了较大的发展,但长期以来该地区多以耕地种植苜蓿作为主要饲草,且草种品种单一、种质退化、产量低,尤其缺乏适宜在荒山荒坡种植的多年生优良草种,因此,为了选择适宜当地耕地和大面积荒山荒坡种植的具有高产、抗寒、耐旱、耐瘠薄优良草种,于1987年和1988年分别在旱川地和旱山地设置了多年生草种引种筛选试验。
The central arid and semi-arid zone centered on Dingxi is the most serious area for water and soil erosion in our province and also a key area for planting trees, barren hills and water and soil conservation in our province. In recent years, with the gradual rationalization of industrial structure in rural areas and the constant deepening of soil and water conservation work, there has been a great development of arable land and large-scale barren hills and grasslands. However, in the region, alfalfa has been cultivated for a long time as the main forage , And a single species of grass species, germplasm degradation, low yield, in particular the lack of suitable for planting perennial fine grass on the barren mountain slopes, therefore, in order to choose suitable for local cultivation and large area barren hills planted with high yield, cold resistance Dry and poor infertile grass species, in 1987 and 1988, respectively, in the dry and mountainous areas to set up the introduction of perennial grass screening test.