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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。
In order to study the variation rules of density and microfibril angle in the length of bamboo pole and bamboo age, The results showed that the dry density of Phyllostachys pubescens increased gradually from the base (1.5 m) to the middle (4.5 m) to the slightly (7.5 m), and there was a significant difference among the three sites. While the difference of dry density between different bamboo ages was small. The microfibril angle of Phyllostachys pubescens reduced with the increase of bamboo height, and the difference of absolute value was small. There was no significant difference between the angles of fibrils; between 2 years and 5 years, the microfibril angle of bamboo increased with the increase of bamboo age. An analysis of variance showed that between 2 years old and 4, 5 years old, There are significant differences, 4,5-year-old bamboo microspilus angle between almost no difference. The above results will provide the theoretical basis for bamboo cultivation and industrial utilization in the future.