Study on the Wild Resource Distribution of Schefflera venulosa in Pu'er City

Based on a comprehensive survey of the geographical distribution wild resources of Schefflera venulosa in Pu'er city, this paper, through the PCA method and the correlation analysis, studied the relationship among geographic distribution, climate and topography, and also discussed the correlation between the altitude and total saponins content of Schefflera venulosa. The results showed that, the wild resources of S. venulosa located in Pu'er city, the horizontal distribution in 99°20′11″~101°55′04″E, and vertical distribution range of 500~1 900 meters. Meanwhile, the principal component analysis showed that the main water heat index which affected the geographical distribution wild resources of Puer city S. venulosa, of indicators was humidity factor heat factor precipitation factor. The correlation analysis results also showed that the altitude distribution and its total saponin content of tree branches and leaves had negative correlation, its correlation coefficient is-0.948, the content ratio of total saponin from Schefflera venulosa leaves between the highest altitude(1 460 m)and the minimum altitude(1 006 m)is 1.0∶1.5.

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