人工林湿地松微纤丝角和结晶度的变异规律

利用X射线衍射技术分析了人工林湿地松微纤丝角和结晶度的变异规律。结果表明,微纤丝角自髓心向外逐渐减小,到一定年轮后保持稳定,且同一年轮内晚材的微纤丝角总是小于或等于早材;随着高度的增加微纤丝角逐渐减小,到达一定高度后变得稳定,到达稍部又增大。结晶度自髓心向外逐渐增加,到一定年龄后趋于平缓,且同一年轮内晚材的结晶度一般比早材大;自基部向上结晶度逐渐增加。

Analysis of wood microfibril angle and crystallinity of Pinus elliottii plantation

In the paper,X-ray diffractometry was used to measure wood microfibril angle and crystallinity of Pinus elliottii plantation.The results show that the microfibril angle of Pinus elliottii is decreasing at first from the pith to the outward part and then retaining steady.And the microfibril angle of late wood is smaller than that of early wood in the same annual ring.The microfibril angle is increasing from the base to the upward part and then retaining steady when getting a certain age,and increasing at last on the tree top.The crystallinity is increasing from the pith to the outward part and and then retaining steady.And the microfibrillar angle of late wood is smaller than that of early wood in the same annual ring.The crystallinity is increasing from the base to the upward part.