对林龄为25a的南酸枣〔Choerospondias axillaris(Roxb.) Burtt et Hill〕纯林、南酸枣-马尾松(Pinus massoniana Lamb.)混交林和南酸枣-杉木〔Cunninghamia lanceolata(Lamb.) Hook.〕混交林中南酸枣木材的解剖特性进行了比较分析。测定结果表明,在25a的树龄内,南酸枣-马尾松混交林、南酸枣-杉木混交林和南酸枣纯林中南酸枣木材纤维的长度分别为0.843～1.401、0.858～1.489和0.873～1.347mm,宽度分别为19.28～23.58、19.34～22.34和19.76～25.26μm,长宽比分别为39.70～62.04、39.20～63.96和40.60～59.34;随树龄的增加,纯林和混交林中南酸枣木材纤维的长度、宽度及长宽比均逐渐增加,且不同林分间的差异逐渐达到显著水平,并以南酸枣-杉木混交林中南酸枣木材纤维的长度和长宽比最大、宽度最小。3种林分中南酸枣木材的导管组织比量、纤维组织比量和木射线组织比量分别为16.1%～16.7%、64.7%～65.2%和12.9%～13.4%,以南酸枣-杉木混交林中南酸枣木材导管组织比量和纤维组织比量最大,但差异均不显著;仅纯林的木材轴向薄壁组织比量(5.8%)显著高于混交林(5.1%和5.2%)。随树龄的增加,3种林分中南酸枣木材微纤丝角均逐渐减小,南酸枣-马尾松混交林、南酸枣-杉木混交林和南酸枣纯林中南酸枣木材微纤丝角分别为23.33°～16.82°、23.20°～16.36°和23.34°～17.41°,且仅在树龄16～25a阶段,混交林中的南酸枣木材微纤丝角显著小于纯林,其中又以南酸枣-杉木混交林中的南酸枣木材微纤丝角最小。研究结果显示,南酸枣-杉木混交林中南酸枣木材的解剖特性总体上最优,在南酸枣木材品质定向培育过程中宜选择杉木作为伴生树种。 

Anatomical characteristics of Choerospondias axillaris(Roxb.) Burtt et Hill wood within 25a

in C. axillaris pure forest, C. axillaris-Pinus massoniana Lamb. mixed forest and C. axillaris-

Cunninghamia lanceolata(Lamb.) Hook .mixed forest were comparatively analyzed. The determination results show that in 25 a treeage, the fiber length of C. axillaris wood in C. axillar is-P. massoniana mixed forest, C. axillaris-C. lanceolata mixed forest and C. axillaris pure forest is 0.843- 1.401,0.858- 1.489 and 0.873- 1.347mm, the fiber width 19.28- 23.58, 19.34- 22.34 and 19.76-25.26μm, the length/width ratio 39.70- 62.04, 39.20- 63.96 and 40.60- 59.34, respectively. As tree age increasing, the length, width and length/width ratio of C. axillar is wood fiber in pure and mixed forests increase gradually, and the difference among different forests reaches significant level gradually, and the length and length/width ratio of C. axillar is wood fiber are the highest and the width is the lowest in C. axillaris-C. lanceol at amixed forest. The proportions of vessel, fiber and wood ray of C. axillaris wood in three forests are 16.1%- 16.7%, 64.7%- 65.2% and 12.9%- 13.4%, respectively. The proportions of vessel and fiber of C. axillar is wood in C. axillaris-C. lanceol at a mixed forest are the highest, but the difference is not significant. The axial parenchyma proportion of C. axillar is wood in pure forest (5.8%) is significantly higher than that in mixed forests (5.1%and 5.2%). With tree age increasing, the microfibril angle of C. axillar is wood in three forests decreases gradually, and that in C. axillaris-P. massoniana mixed forest, C. axillaris-C. lanceolata mixed forest and C. axillar is pure forest is 23.33°- 16.82°, 23.20°- 16.36° and 23.34°- 17.41°, respectively. At tree age stage of 16- 25a, the microfibril angle of C. axillar is wood in mixed forests is lower than that in pure forest, and that in C. axillaris-C. lanceolata mixed forest is the lowest. It is suggested that in general, the anatomical characteristics of C. axillar is wood in C. axillaris-C. lanceolata mixed forest are the best, therefore, C. lanceolata is suitable to be used as associated tree species in process of timber culture of C. axillar is wood.