【摘要】 分析了丰宁试验区植物区系、植被类型、植物资源及其利用状况后认为：丰宁试验区植物区系成份具有内蒙古草原植物区系成份的特点。但植被类型较复杂、植物种类组成较丰富、特别是具有一些天然林类型。此外，在区系植物组成中蔷薇科植物的地位突出，而藜科植物的地位降低，说明植被也有明显的过渡特征。可供利用的植物资源如观赏植物、药用植物和牧草资源较丰富，具有开发潜力。但由于超载过牧，导致９０％以上的草地退化，退化程度主要以轻度和中度为主，退化形式主要是河滩草甸盐渍化，丘陵缓坡草地沙质化，山地草地砾质化。更多还原

【Abstract】 The vegetation flora ,vegetation types ,vegetation resources and their utilization condition in Fengning Experiment Area were analysed. From this it follows that the flora compeitionof FengT1ing Experiment Area has the feature in common with the flora composition of InnerMongolian grassland but the former has a more complex types and abundant species,in particular thenatural forest.In addition,the rosaceous plants in the Fengning flora occupy an important peitionwhile the chenopodiaceae occupy a less important peition,The usable vegetion resources includemedical plants,ornamental:plants and grassland forages,However.over 90%of grassland hasdegraded due to overgrazing.The degradation of grassland in the area is manifested in the salinizationof river bank meadow sandification of hillside grassland and skeletonization of mountainousgrassland.更多还原