宁夏围栏内甘草等几个中草药种的种群空间分布格局研究

STUDIES ON THE SPATIAL DISTRIBUTION PATTERN OF THE POPULATIONS OF GLYCYRRHIZA URALENSIS(LIQUORICE) AND OTHER SEVERAL CHINESE HERBAL MEDICINE SPECIES IN NINGXIA FENCE

以样地调查数据为基础,应用方差均值比率和聚集强度指数的测定分析方法,对宁夏几个野生中草药种的种群分布格局进行分析,结果表明:甘草,黄蒿,刺蓬,蒺藜都趋于聚集分布,且聚集强度依次为:黄蒿>刺蓬>蒺藜>甘草,导致这种聚集程度不同的可能原因是种群的不同繁殖方式及营养资源的竞争.方差比率与聚集指数分析两者计算结果能相互印证并与野外实际观察相吻合.由于方差比率法简单,计算量小,故方差比率法对研究宁夏中草药种群分布格局是一种较为可信和可用的方法.

Based on the data sampling from the field, the analysis methods of Variance/Mean and the aggregation intensity were applied to analyze the distribution pattern of the populations of Glycyrrhiza uralensis, Artemisia scoparia, Salsola ruthenica and Tribulus terrestris, which are wild Chinese herbal medicine species, in Ningxia. The analysis results showed all of the populations tended to clumping distribution and their aggregation intensities had the order as follows： Artemisia scoparia 〉 Salsola ruthenica 〉 Tribulus terrestris 〉 Cdycyrrhiza uralensis, The main reasons might be that the species would have different reproductive ways and there would be stronger competitions between the species in nutrition resources. The Variance/Mean Method may be regarded as a trust and applicable way in studying the distribution pattern of the Chinese herbal medicine species in Ningxia because it is simple and easy to use and the results of calculation by the two methods （ aggregation intensity and Variance/Mean） are similar to what we observed in the field.