陕西省禾本科牧草资源的区系特征

THE FORAGE GRASS RESOURCES AND FLORA CHARACTERISTIC OF GRAMINEAE IN SHAANXI PROVINCE

陕西省禾本科牧草种质资源丰富，据调查共有８０属、１７５种。其区系成分多样，温带性质明显，热带成分占很大比例，在属级水平上有东亚、中亚和地中海区系成分的渗入。

The forage grass germplasm resources of Gramineae abound in Shaanxi Province. There are 80 genera and 175 species according to the investigation. The flora elements are variety, its temperate quality are obvious, but the tropic takes a great proportion. And on the level of genera, there are East Asia, Central Asia and Mediterranean flora elements intrusion, it is in accord with the geographical place of Shaanxi Province.