多伦县蔡木山自然保护区植物区系组成特征

对地处农牧交错区典型地段的内蒙古多伦县蔡木山自然保护区植物属、种的区系特征进行了统计并与临地区进行的对比分析，结果表明：植物种类的多样性较高，本保护区范围内现共登记有维管植物77科256属502种。植物属的分布型特征表现出本地区植物区系的温带性质，在本保护区256属植物中，北温带分布属为82个，占总属数的32％，包括北温带与南温带间断分布，共计111属,占总属数的4％。区系地理成分较临近地区复杂且具有过渡性。保护区植物生活型特征表明本区多年生草本植物占绝对优势，表现出草原植物群落种类组成的特征，但由于本区有沙带的特殊景观，乔木和灌木种类较典型草原多，保护区中生以上水分生态类型的植物种比例较草原区高。

The Characteristics of Compact of Florstic Elements in DUO LUN CAI MU Mountainreservation Area

An characteristics of compact of florstic elements were studies in DUO LUEN CAI MU mountain reservation area in agriculture animal husbandry ecotone. Based on the statistics and analysis at generaic and specific levels ,and the comparison with the relation of the sourrounging fliras ,the main results and conclusions obtained are as follows:The species diversity is relatively high .The 502 species of vascular plants, belong to 77 family and 256 genera,have been recorded nom in DUO LUEN CAI MU mountain reservation area. The temperate zone of florstic elements were represented by characteristics of areal types of genera. within 256 genera plants ,82 genera beloning to north temperate ,proportion is 32%,inclusion South temperate disjucted total have 111generate,proportion 44%.The florstic diversity were complexity and passageway then near sorrounding region. The species of steppe fiorstic was main florstic elements.The characteristics of Life form was character of compact of steppe which have dominance of perennial herb. There have more arbor,shrub then steppe. The mesophytes and over mesophytes were main plant water ecological types in CAI MU MOUNTAIN protection area.