高级检索
    陈晶晶, 黄荣凤, 李钢铁, 侯向阳, 秦艳,  , 张国盛, 刘洪娥, OxanaVishnyakova. 浑善达克沙地榆树径向生长特性[J]. 北京林业大学学报, 2014, 36(6): 41-47. DOI: 10.13332/j.cnki.jbfu.2014.06.010
    引用本文: 陈晶晶, 黄荣凤, 李钢铁, 侯向阳, 秦艳,  , 张国盛, 刘洪娥, OxanaVishnyakova. 浑善达克沙地榆树径向生长特性[J]. 北京林业大学学报, 2014, 36(6): 41-47. DOI: 10.13332/j.cnki.jbfu.2014.06.010
    CHEN Jing-jing, HUANG Rong-feng, LI Gang-tie, HOU Xiang-yang, QIN Yan, ZHANG Guo-sheng, LIU Hong-e, Oxana Vishnyakova, . Radial growth characteristics of Ulmus pumila var. sabulosa in Otindag sand land, northern China.[J]. Journal of Beijing Forestry University, 2014, 36(6): 41-47. DOI: 10.13332/j.cnki.jbfu.2014.06.010
    Citation: CHEN Jing-jing, HUANG Rong-feng, LI Gang-tie, HOU Xiang-yang, QIN Yan, ZHANG Guo-sheng, LIU Hong-e, Oxana Vishnyakova, . Radial growth characteristics of Ulmus pumila var. sabulosa in Otindag sand land, northern China.[J]. Journal of Beijing Forestry University, 2014, 36(6): 41-47. DOI: 10.13332/j.cnki.jbfu.2014.06.010

    浑善达克沙地榆树径向生长特性

    Radial growth characteristics of Ulmus pumila var. sabulosa in Otindag sand land, northern China.

    • 摘要: 以位于浑善达克沙地宝绍岱苏木和那日图苏木的天然沙地榆为材料,测定沙地榆的年轮宽度、早材宽度和晚 材宽度,分析其偏心生长状况、径向生长规律和径向生长动态,为浑善达克沙地榆树种群保护和天然更新提供依 据。结果表明:宝绍岱和那日图生长的沙地榆均存在不同程度的偏心生长,且偏心形态比较复杂,形状不规则;宝 绍岱和那日图沙地榆的径向生长过程中均出现了2 个生长高峰期,其中年轮宽度和晚材宽度的径向生长规律非常 相似,2 次高峰期出现的时间完全一致,径向累积生长曲线均呈双S 型;早材宽度在整个生长过程中的变化幅度很 小,高峰期出现的时期与年轮宽度和晚材宽度相差比较大,累积生长曲线呈线型;宝绍岱和那日图沙地榆的平均生 长量分别为2.25 和2.30 mm,无显著差异,但宝绍岱沙地榆年轮宽度和晚材宽度的变异系数达到20%以上,明显大 于那日图沙地榆;宝绍岱沙地榆径向生长第1 次高峰出现在第17 ~21 年,那日图沙地榆径向生长第1 次高峰出现 在第15 ~19 年,二者的成熟龄相差3 年。

       

      Abstract: Ulmus pumila var. sabulosa specimens were collected from natural forests located in Baoshaodai and Naritu of Otindag sand land northern China. To provide a basis for the population conservation and natural regeneration of elms in Otindag sand land, tree-ring width, earlywood width and latewood width were measured to study their eccentric growth and radial growth. The results showed that elms in Baoshaodai and Naritu had different degrees of eccentric growth with complicated eccentric forms and irregular shapes. Elms in both Baoshaodai and Naritu had two growth peaks in the ring widths. Tree-ring width and latewood width had a similar double S growth pattern and their growth peaks occurred in exactly the same time. In contrast, earlywood width had little change during the whole growth period. Earlywood width had different growth peaks from annual ring width and latewood width, and the cumulative growth curve of earlywood width was linear. There was no significant difference in average annual growth of elms between Baoshaodai and Naritu, which were 2.25 mm and 2.30 mm respectively. Tree-ring width and latewood width of elms in Baoshaodai had a variation coefficient of 20%, which was much higher than that in Naritu. The first radial growth peak of U. pumila var. sabulosa in Baoshaodai occurred in the year 17 to 21 while that in Naritu occurred in the year 15 to 19. The mature age of U. var. sabulosa in the two places differs by 3 years.

       

    /

    返回文章
    返回