8个杨树无性系/品种木材解剖特征及其径向变异模式  

Anatomical characteristics and radial variations in eight poplar clones/cultivars

作　　者：刘亚梅[1] 刘盛全[1] 周亮[1] 胡建军[2] 赵自成 郑向丽 LIU Yamei;LIU Shengquan;ZHOU Liang;HU Jianjun;ZHAO Zicheng;ZHENG Xiangli(Wood Quality Improvement&High Efficient Utilization Key Lab of State Forest and Grassland Administration,School of Forestry&Landscape Architecture,Anhui Agricultural University,Hefei 230036,China;Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,China;Jiaozuo Academy of Agriculture and Forestry Sciences,Jiaozuo 454001,China;Suizhong County Stateowned Qianwei forest farm,Suizhong 125203,China)

机构地区：[1]国家林业和草原局林木材质改良与高效利用重点实验室,安徽农业大学林学与园林学院,安徽合肥230036 [2]中国林业科学研究院林业研究所,北京100091 [3]焦作市农林科学研究院,河南焦作454001 [4]国有绥中县前卫林场,辽宁绥中125203

出　　处：《南京林业大学学报（自然科学版）》2023年第1期234-240,共7页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家重点研发计划(2017YFD0600201)。

摘　　要：【目的】厘清8个杨树无性系/品种木材解剖特征及其径向变异模式,分析无性系和树龄对其解剖特征的影响,为人工林杨树优良速生无性系筛选及管理提供理论依据。【方法】在河南焦作林场选取8个杨树无性系/品种(林龄9~10 a):50号杨、‘中林46杨’‘108杨’、36号杨、N179杨、‘丹红杨’‘桑巨杨’‘南杨’,采用离析和切片的方法制备试样,应用显微成像技术测量不同杨树无性系纤维、导管、组织比量和木射线特征等。【结果】8个杨树无性系/品种年轮宽度、纤维长度和纤维宽度均值范围分别为7.44~9.64 mm、971.06~1 152.94μm和15.38~19.84μm;导管长度、导管宽度和导管分布频率均值范围分别为409.88~491.71μm、59.30~63.12μm和44.31~51.84个/mm^(2);双壁厚、胞腔径均值范围分别为3.23~4.36μm、11.22~15.90μm;纤维长宽比、壁腔比、腔径比和微纤丝角均值范围为56.85~78.91、0.26~0.41、0.72~0.80和16.34°~19.16°;纤维、导管和木射线的比量均值范围为59.45%~67.73%、21.40%~29.99%和10.20%~14.80%;木射线高度和宽度均值范围为260.76~306.59μm和7.13~8.24μm。从髓心至树皮,年轮宽度和导管宽度先增加后减小,纤维长度、宽度、长宽比、双壁厚、导管长度、导管宽度、导管比量和木射线高度先增加后达到稳定。微纤丝角度、纤维比量和木射线比量沿径向呈现逐渐降低后稳定的趋势,导管频率沿径向呈先减小后增加的趋势,而胞腔径、壁腔比、腔径比和木射线宽度在径向上变化呈平缓波动模式。方差分析表明,无性系和树龄对解剖特征均有显著影响。【结论】综合考虑生长速度和解剖特征指标,‘丹红杨’表现最好,建议8个杨树无性系/品种的最适轮伐期为8~9 a。【Objective】The aims of this study was to explore the anatomical characteristics and radial variations in eight poplar clones or cultivars and to analyze the influence of cloning and aging on anatomical characteristics. This study provides a theoretical basis for selecting poplar clones and cutting management of fast-growing plantations. 【Method】 Clone 50(P. deltoides 55/65), cultivar ‘Zhonglin46’(P. euramericana cv. Zhonglin46), ‘108’(P. euramericana cv. Guariento), clone 36(P. deltoides 2KEN8), clone N179(P. nigra N179), cultivars Danhong(P. deltoides cv. ‘Danhong’), ‘Sangju’(P. euramericana cv. Sangju), and ‘Nanyang’(P. deltoides cv. Nanyang) which were about nine to ten years old were cut from Jiaozuo forest farm in Henan province, China. The samples were segregated and sectioned, and the characteristics of fiber, vessel, ray, and tissue proportions were measured using microscopic imaging. 【Result】 The average ring width, fiber length, and fiber width were 7.44-9.64 mm, 971.06-1152.94 μm, and 15.38-19.84 μm. The mean ranges of vessel length, vessel width, and vessel frequency were 409.88-491.71 μm, 59.30-63.12 μm, and 44.31-51.84 inds/mm~2. The double-wall thickness and lumen diameter ranges were 3.23-4.36 μm and 11.22-15.90 μm. The average ranges of fiber length to width ratio, wall to lumen ratio, lumen to width ratio, and microfibril angle were 56.85-78.91, 0.26-0.41, 0.72-0.82, and 16.34-19.16°. Proportions of fiber, vessel, and ray were 59.45%-67.7%, 21.40%-29.9%, and 10.20%-14.80%. The ray heights and width were 260.76-306.59 μm and 7.13-8.24 μm. From the pith to the bark, the ring width and vessel diameter first increased and then decreased, and the fiber length, fiber width, fiber length-to-width ratio, double wall thickness, vessel length, and ray height first increased along the radial direction and then stabilized. The microfibril angle, proportion of fiber, and proportion of rays first decreased along the radial direction and then stabilized;the vessel frequ

关 键 词：杨树 无性系 木材 解剖特征 径向变异 

分 类 号：Q781.3[生物学—分子生物学]