利用SilviScan-3测定实心瓜多竹微纤丝角

实心瓜多竹(Guadua amplexifolia)隶属于瓜多竹属(Guadua),丛生,是南美洲主要栽培竹种之一,广泛分布于哥伦比亚、厄瓜多尔、巴西、阿根廷等国,竹材基部实心,高25m,径15cm左右,是较好的建筑用原料,耐短期零度低温,适应我国热带、南亚热带或中亚热带与南亚热带过渡区的气候条件(邹跃

Microfibril Angle of Guadua amplexifolia Bamboo Measured by SilviScan-3

To investigate the microfibril angle (MFA) variation with respect to positions along longitudinal direction (bottom, middle and top of culm) and radial direction (from inner part to outer part of culm wall) of Guadua amplexifolia, MFA was measured by SilviScan-3 and X' Pert Pro (XRD).There was no significant difference between MFA measured by SilviScan-3 and XRD.Simple coefficient of correlation was 0.84.The mean MFA measured by SilviScan-3 and XRD were 8.2° and 8.8° respectively, and varied from 6.2° to 17.8° and from 6.9° to 12.2°.Compared with XRD, SilviScan-3 provided a continuous and more rapid method for determining MFA variation in bamboo culm.According to results of SilviScan-3, MFA in bottom was higher than that of in middle which was higher than that of in top of culm.Maximum MFA occur in inner layer, MFA decreased rapidly from inner layer to 2 mm, and fluctuated stably from 2 to 6.5 mm, and then increased subtly from 6.5 mm to outer layer.The radial tendency of MFA in the bottom was similar to that in middle and top of culm.