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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。
The variation of microfibril angle and crystallinity of Pinus elliottii plantation was analyzed by X-ray diffraction. The results showed that the microfibril angle gradually decreased from the medulla to the outside and remained stable after a certain annual ring, and the microfibril angle of latewood was always less than or equal to that of earlywood in the same year. With the increase of height Fibril angle gradually reduced to reach a certain height after becoming stable, reaching slightly larger and larger. The degree of crystallinity gradually increased from the medullary center outward, and tended to be gentle after a certain age. The crystallinity of the latewood was generally larger than that of the earlywood in the same year, and the crystallinity increased gradually from the base.