Bark and Water Content in Different Diameter Stems and Branches of Taxus yunnanensis

doi:10.13466/j.cnki.lyzygl.2016.05.017

Abstract

Abstract: With the development of Taxus industry,bark is becoming more important as the raw medicinal material due to the highest content of taxol in Taxus yunnanensis.With reference to classification of tree diameter class standard,the stem and branch diameter of Taxus yunnanensis in plantation could be divided into 5 classes.A study was carried out on 270 stem and branch samples from Kunming site and 67 samples from Yibin site.The result shows that the content of fresh bark weight varied from 12.88% to 28.98%,the content of dry bark weight varied from 11.01% to 26.36%.The mean water content of stem and branch is 53.89%,and of bark is 60.74%.The variety of water content with the increase of stem and branch diameter class is irregular.The content of fresh and dry bark weight decreased obviously when the stem and branch diameter increased.The relationship between the bark content and the stem and branch diameter could be described by the power function equation.

Key words: Taxus yunnanensis, diameter, bark content, water content, curve regression

CLC Number:

S718.43

LI Yongpeng, ZHANG Jinfeng, FENG Qian, WANG Lei, WEN Shuang, FANG Jun. Bark and Water Content in Different Diameter Stems and Branches of Taxus yunnanensis[J]. FOREST RESOURCES WANAGEMENT, 2016, (5): 98-102.

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