甘肃省禾本科野生牧草种质资源及区系分析

甘肃省有丰富的禾本科野生牧草资源,经整理共有74属、237种,以多年生、中生草本植物为主,绝大多数具有较高的饲用价值。区系中以单型属和少型属居多,有中国特有属,无甘肃特有属;有12个分布区类型和6个变型,分布类型多样。在属级水平上温带成分明显,占48．6％;热带成分占29．7％,东亚、中亚和地中海区系成分有少量渗入。

Natural forage resources and flora characteristics of Gramineae in Gansu province

Natural Gramineous forage germplasm resource is very abundant in Gansu Province. There are 74 genus, 237 species. Most of them are mesophytic herbage, and with high feeding value. The main is monotype and little type genus in the flora. It has Sinic unique genus, but does not have Gansu's unique. There are 12 areal types and 6 subtypes. The distributed type is diverse. The temperate character is obvious and the proportion of temperate types is 48. 6 percent, the tropic types 29. 7 percent. The proportion of east Asia, central Asia and the Mediterranean types are lower at genus level.