皇甫川流域丘陵沟壑区陡沟坡植被特征初探──以准格尔旗境内陡沟坡为例

Study on Vegetation Characteristics of the Steep Slopes in Hilly and Gully Areas,the Huangfuchuan Basin──A Case Study of Steep Slope in ZhunGer

皇甫川流域陡沟坡面积不断增加,水土流失严重,陡沟坡植被的建设在水土保持工作中具有重要作用,而陡沟坡植被特征对林草植被建设具有指导意义.对皇甫川流域陡沟坡植被的调查研究表明:1)研究区以多年生中旱生草原植物种为主,区系地理成分以达乌里—蒙古成分、东亚成分为主;2)阴坡植被有中生化的趋势,阳坡植被表现出旱化的特点,坡面植被灌丛化.因此,在陡沟坡植被建设与恢复中,应以这些特征为依据进行物种的选择和配置.

The situation of water loss and soil erosion in the Huangfuchuan basin is still serious, and the area of steep slopes is increasing now. The vegetation of steep slopes becomes more important in soil and water conservation and its characteristics play an important role in the vegetation construction. The study on steep slope vegetation in the Huangtuchuan basin is shown as follows; 1） The perennial mesic xerophyte herb plants are dominant. The geographic components of flora are mainly dawull-mongolia component and east Asia component; 2） The vegetation of shade slopes has the trend of mesophyte,the vegetation of sunny slopes has xeric characteristic,and the vegetation of steep slopes has the trend of thicketization in some extent. So the vegetation characteristics should be cousidered in the vegetation construction of the steep slopes.