【摘要】 为了解河北省张家口市阳原县种质资源的分布特点，对该地展开实地调查，综合运用线路调查、样地调查等多种调查方法，以及海拔分析、多样性分析、优势科属种分析等多种分析方法，对种质资源的特征进行分析。结果表明：阳原县各科属内所含物种数量的分布呈现不平衡不均匀的状态，其植物多样性随海拔升高显著递减，优势物种呈垂直分布规律，最后通过对多样性指数的分析发现，东城镇植物多样性最高，各种指数均居首位，物种最为丰富，可多引种栽培，提高植物多样性，而要家庄乡的植物多样性最低，是由于当地盐碱地多，土壤条件差，应针对该自然条件多栽种耐盐碱植物。更多还原

【Abstract】 In order to understand the distribution characteristics of germplasm resources in Yangyuan County, Zhangjiakou City, Hebei Province, a field survey was carried out in the area, and the characteristics of the germplasm resources were analyzed by comprehensively applying a variety of survey methods, such as line survey and sample survey, as well as a variety of analytical methods, such as elevation analysis, diversity analysis, and analysis of dominant species within families and genera. The results of the survey and analysis show that: the distribution of the number of species contained in each family and genus in Yangyuan County presents an unbalanced and uneven state, its plant diversity decreases significantly with the elevation, and the dominant species present a vertical differentiation law, and finally, through the analysis of the diversity indexes, it is found that the Dongcheng Township has the highest plant diversity, with various indexes in the first place, and the most abundant species, which can be introduced into the cultivation and improve the plant diversity, and to be The lowest plant diversity in Jiazhuang Township is due to the fact that there is a lot of saline and alkaline land in the area and the soil conditions are poor, so more saline and alkaline tolerant plants should be planted for this natural condition.更多还原