earlywood

earlywood

1. 9)The longitudinal MOE and tensile strength of tracheids general increase from the first to the last earlywood cell.

9）在同一年轮内，早材管胞的纵向强度和模量从内向外一般呈现出增大的趋势。

2. Keywords Plantations;Larch;Earlywood;Radial variations;Optimal segmentation;Fractal analysis;

人工林;落叶松;早材宽度;径向变异;最优分割;分形分析;

3. The crack was blocked by the vessel, spindly ray and the border of earlywood and latewood.The intercellular layer of ray peeled off easily under ...

导管、纺锤形木射线和早晚材边界对裂纹扩展起到阻挡的作用,在轴向力作用下木射线的破坏主要是胞间层的撕裂,纹孔常常保持完整的形态,裂纹顺着纹孔边缘扩展。

4. Keywords Stress;Strain;Model;Moisture Content;Microflbril Angle;Earlywood Ratio;

应力;应变;模型;含水率;纤丝角;早材率;

5. During the wood drying, the tangential strain is larger than the radial one.The strain of latewood is much more than that of earlywood in the same direction.

弦向总应变约为径向总应变的1.8倍，干燥中弦向应变比径向应变大，同一方向晚材应变比早材应变大。

6. The result revealed that the microfibril angle of earlywood and latewood had a high significant difference among clones.

日本落叶松微纤丝角的径向变异规律为：在髓心处最大，以后逐渐减小。

7. Earlywood and latewood have a pronounced difference in colour, the latewood having darker, more sharply defined bands.

早木及晚木颜色分别明显，后者有更深、更尖的带状。

8. The broad sense heritability estimates of clones were 0.7674 and 0.8043, indicating the microfibril angle of earlywood and latewood was under strong genetic control.

早材和晚材的微纤丝角受中到强度遗传控制，广义遗传力分别为0.7674、0.8043。

9. The results showed that Chinese pine presented high sensitivity to climatic changes, and its earlywood width showed the highest sensitivity.

结果表明：油松生长对环境变化十分敏感，以早材最为敏感。