关键词: 青檀, 檀皮质量, 生态因子, 相关性分析, 主成分分析

Abstract: Pteroceltis tatarinowii Maxim., the main raw material for manufacturing of rice paper, has a high economic value. In order to obtain high-quality bark of P. tatarinowii and provide theoretical guidance for artificial cultivation of it, this paper selected six provinces around Anhui Province where abundant P. tatarinowii distribute, and compared fiber length, width and length-width ratio of P. tatarinowii there. Results showed that the fiber length, width and length-width ratio of P. tatarinowii varied with its growing environments and has a significant difference. The P. tatarinowii in Qingtansi, Shandong Province and Jingxian, Anhui Province all has high quality and its length-width ratio is 283.8 and 229.55, respectively, which were obviously higher than that in other four places; Correlation analysis showed that the quality of P. tatarinowii bark has a certain degree of positive and negative correlation with its various ecological factors; the principal component analysis indicated that the accumulated contribution rate of three principal components reached 94.66%, and the rank of each factor for the accumulated contribution rate from better to less was: temperature-light factor, soil factor and location factor, which manifested that the temperature-light factor had the largest effect on the quality of P. tatarinowii.

Key words: Pteroceltis tatarinowii Maxim., bark quality, ecological factor, correlation analysis, principal component analysis