西藏砂生槐种群分布格局分析

通过对雅鲁藏布江中游谢通门县卡嘎镇、乃东县多颇章和朗县朗镇三个区域砂生槐群落的调查与分析，结果表明：砂生槐天然种群分布在干旱荒漠地区，常形成单优群落，结构单一，砂生槐为群落中的优势种，在流动或半固定的风沙地上成均匀分布，种群密度大，结构相对稳定，退化程度小；在砾质沙地风沙坡地上成集群分布，种群密度小，种群稳定性较差，退化程度明显。

Analysis on Distribution Pattern of Sophora moorcroftiana Population in Tibet

Sophora moorcroftiana community was investigated and analyzed in three regions,that is.,Kaga town of Xietongmen county,Duopozhang town of Naidong county and Lang town of Lang county in the middle reaches of the Yarlung Zangbo river,the results showed that: the natural population of Sophora moorcroftiana which distributed over arid desert area usually forming the single-dominant community,and its structure was also single,and the Sophora moorcroftiana was the dominant species of community;Sophora moorcroftiana which distributed evenly over floating or semi-fixed windy and sandy land,and its population density was large,and its structure was relatively stable,and its degradation degree was also small;Sophora moorcroftiana which distributed over gravelly sandy land and windy & sandy slope land was a cluster distribution,and its population density was small,and its population stability was relatively worse,as well as,its degeneration degree was apparent.