[1]许竹锐,王世虎,高青青,等. 冀北山地不同坡向白桦枝叶异速生长关系研究[J].西北林学院学报,2024,39(1):52-58.[doi:10.3969/j.issn.1001-7461.2024.01.07]
　XU Zhu-rui,WANG Shi-hu,GAO Qing-qing,et al. Allometric Relationship Between Twig and Leaf Sizes of Betula platyphylla on Different Slopes in Mountaineous Areas of Northern Hebei[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2024,39(1):52-58.[doi:10.3969/j.issn.1001-7461.2024.01.07]
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 冀北山地不同坡向白桦枝叶异速生长关系研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第39卷
期数:
2024年第1期
页码:
52-58
栏目:
出版日期:
2024-01-31

文章信息/Info

Title:
 Allometric Relationship Between Twig and Leaf Sizes of Betula platyphylla on Different Slopes in Mountaineous Areas of Northern Hebei
文章编号:
1001-7461(2024)01-0052-07
作者:
 许竹锐; 王世虎; 高青青; 于小萌; 徐学华*
 （河北农业大学 林学院，河北 保定 071000）
Author(s):
 XU Zhu-rui; WANG Shi-hu; GAO Qing-qing; YU Xiao-meng; XU Xue-hua*
 (College of Forestry,Hebei Agricultural University,Baoding 071000,Hebei,China)
关键词:
 ; 白桦; 枝叶性状; 生长策略; 异速生长
Keywords:
 ; Betula platyphylla;  twig-leaf trait;  growth strategy;  allometry
分类号:
S792.153
DOI:
10.3969/j.issn.1001-7461.2024.01.07
文献标志码:
A
摘要:
 当年生小枝作为植物生长的独立构件单元，研究其大小关系对于理解植物生存适应策略具有重要意义。以冀北山地不同坡向白桦枝叶为研究对象，测定小枝的茎干质量、叶片干质量、叶片面积、叶柄干质量以及小枝干质量，分析不同坡向白桦枝叶生长关系，揭示白桦枝叶生长对坡向的生态策略和适应性。结果表明：1）除茎干质量外，其余干质量皆显示为半阳坡显著大于阴坡，叶片面积在坡向间无显著差异。2）标准化主轴回归分析（SMA）表明，在小枝水平上，不同坡向间茎干质量与小枝干质量、总叶片干质量与小枝干质量、总叶片面积与小枝干质量均为等速关系，而总叶柄干质量与小枝干质量为异速关系；且茎干质量与小枝干质量、总叶柄干质量与小枝干质量的共同斜率1.12和1.22大于总叶片干质量与小枝干质量的共同斜率1.04。3）在叶水平上，阴坡和半阳坡总叶片干质量与总叶柄干质量为异速关系，在半阴坡为等速关系；总叶片面积与总叶柄干质量在阴坡为等速关系,其余坡向为异速关系。4）每个坡向叶大小与出叶强度呈负等速关系；叶大小以叶干质量表示时，阴坡异速生长常数-0.18为最小；叶大小以叶面积表示时，半阳坡异速生长常数2.01为最小。结果表明，白桦为适应坡向的变化，会优先将资源分配给茎和叶柄，且阴坡白桦小枝上会着生更多面积大而干质量小的叶片，以扩展其生长空间，获得更多的光照，利于白桦的生长。
Abstract:
 Current year twig is an independent component unit for plant growth,it is important to study the quantitative relationships that are relative to the twig growth for understanding the survival and adaptation strategies of a plant.In this study,we took the current year twigs of Betula platyphylla growing on different slopes in mountainous areas of Northern Hebei as the research objects,growth parameters of different parts of a twig were measured to analyze the relationship between the twig growth and slope aspect,and to reveal ecological strategies and adaption of B.platyphylla,parameters included the dry weight (DW) of the twig stem,DW of the leaves of a twig,leaf area,DW of the petioles of a twig,and DW of a whole twig.The results showed that 1) except for the DW of the twig stem,other dry weigh parameters of the twig of B.platyphylla growing on semi-sunny slope were significantly higher than those on shady slope,and there was no significant difference in leaf area between different slopes.2) The standardized major axis estimation (SMA) showed that at the twig level,the relationships of DW of the twig stem & DW of a whole twig,DW of the total leaves of a twig & DW of a whole twig,total leaf area of a twig & DW of a whole twig,among different slopes were isokinetic,while the relationship between DW of the total petiole of a twig and DW of a whole twig was allometry.Moreover,the common slopes of the twig stem DW & whole twig DW,and total petiole DW & whole twig DW were 1.12 and 1.22,which were greater than the common slope of whole leaves DW of a twig & the whole twig DW (1.04).3) At the leaf level,the relationship between total leaf DW of a twig & total petiole DW of a twig was allometry on shady and semi-sunny slope,and isokinetic on semi-shady slope.The relationship between the total leaf area of a twig & total petiole DW of a twig was isokinetic on the shady slope,and allometry on other slopes.4) The leaf size in each aspect had a negative isokinetic relationship with the leaf intensity.When the leaf was expressed by DW,the normalization constant was the smallest (-0.18) on shady slope.When the leaf was expressed by area,the normalization constant was the smallest (2.01) on semi-sunny slope.The results indicate that in order to adapt to the change of slope aspect,plant will give priority to allocating resources to stems and petioles,and more leaves with large area and small mass will be planted on the twigs of B.platyphylla on the shady slope to expand its growth space,obtain more light and facilitate the growth.

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备注/Memo

备注/Memo:
 收稿日期：2022-11-10修回日期：2023-02-27
基金项目：河北省科技计划项目（17236801D-2）；河北省重点研发计划项目（19226814D）。
第一作者：许竹锐。研究方向:植物功能性状。E-mail:2125197958@qq.com
*通信作者：徐学华，副教授。研究方向:森林生态系统结构与功能。E-mail:xuehuaxu2001@163.com
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