大熊猫主食竹引种区生态气候相似距的研究

选择四川高山竹类分布区的23个县市39个引种点,与平武王朗、卧龙、宝兴引种试验区的4个主要气象因子,采用相似分析和聚类分析法进行研究。结果表明,所计算的147个相似距中,距离在0.1～0.3Ⅰ级相似距有33个点,0.3～0.5Ⅱ级相似距有81个点,0.5～1.0Ⅲ级不相似有33个点。Ⅰ～Ⅱ级相似距所代表的点之间可以直接引种或间接引种驯化。相似距与实际引种效果检验表明,相似距的可靠程度为71.43％。通过相似距进一步聚类分析发现,39个引种点形成6个气候类区,在同一类区间可以相互引种。由于各区引种点的海拔高度不同,反映出一般气候水平分布和垂直地带性特征。本文还提出了四川省最佳引种方案,为开展全省性引种提供依据。

STUDIES ON SIMILAR DISTANCE OF ECOLOGICAL CLIMATE FOR INTRODUCTION AREA OF GIANT PANDA'S STAPLE FOOD

Four main climatological factors for 39 introduction places in 23 counties of Sichuan alpine bamboos distributing district and the introduction experiment area in Wanglang of Pingwu, Wolong and Baoxing were discussed by means of similar distance and cluster analysis. The results showd that there are 33 places of first grade similar distance from 0.1 to 0.3, 81 places of second grade similar distance from 0.3 to 0.5 and 33 places of third grade similar distance from 0.5 to 1.0 among 147 similar distances. It can introduce direct or indirect among places of first and second grades similar distance. The dependable degree of similar distance is 71.43% by test between similar distance and introduction effect. Further cluster analysis demonstrated that 39 introduction places have 6 climate districts, and it can introduce each other among the same climate district.