慈竹密度和微纤丝角变异规律研究

Study on the Tsz bamboo density and the variation of microfibril angle

以四川慈竹为材料,对其密度和微纤丝角在竹杆纵向和不同竹龄间的变异规律进行了研究。结果表明:慈竹气干密度从基部(1.5m)、中部(4.5m)到稍部(7.5m)逐渐增大,并且三个部位密度值间存在显著差异,同时慈竹密度随竹龄增大而逐渐增加,但不同竹龄气干密度值间差异较小;慈竹微纤丝角随竹高增大而减小,并且绝对值差异较小,基部、中部和稍部处竹材的微纤丝角间差异不显著;2年生到5年生间,竹材微纤丝角随竹龄的增大有增大趋势,方差分析表明,2年生与4、5年生慈竹微纤丝角之间均存在显著差异,4、5年生慈竹微纤丝角之间几乎没有差异。以上结果将为今后慈竹的竹林培育和工业利用提供理论依据。

The bamboo properties of Neosinocalamus affinis Keng,incluing the density and microfibril angle was studied.Results show that the bamboo density increased from the basic part to the top part,and a significant difference among the three density was found.The density had little difference in ages,but it increased from 1-year to 5-year.Microfibril angle decreased with bamboo height increasing,and the difference among three selected bamboo height was little.The analysis of variation showed that there was a distinct variation between different bamboo ages,and the difference between 2-year and 4/5-year were larger than that among 4-year and 5-year was not variation.This study can lay theoretical foundation for cultivation and industrial utilization of N.affinis.