甘肃省豆科牧草资源及植物区系分析

甘肃省豆科牧草资源有26属、126种,以多年生和草本植物为主.有近80%的种类具有饲用价值,其中30%具有优良的饲用等级,有18%的种类具有毒性.区系中以少型属居多,无中国和甘肃特有属种;共有9个分布区类型和4个变型.在属级水平上以北温带成分为主,温带成分次之,类型间的差异性不显著.热带成分占有较大比例.有东亚、中亚和地中海成分渗入.

Legume forage resources and floristic characteristics in Gansu Province

There are 26 genera,126 species of legume forage resource in Gansu Province.Most of them are perennials.Eighty percent of them can be used for feed;30% with high feeding value and 18% with toxicity.There is no Sinic and Gansu's unique genus and species,totally 9 areal types and 4 subtypes.The north temperate distributional type is dominant,followed by temperate distributional type and no significant difference between those types.Tropic genera occupy higher proportion;those from East Asia,Central Asia and the Mediterranean are also intermingled.