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    吴义远, 董文渊, 刘培, 张孟楠, 谢泽轩, 田发坤. 不同土壤水分和养分条件下筇竹竹秆解剖特征及其适应可塑性[J]. 北京林业大学学报, 2020, 42(4): 80-90. DOI: 10.12171/j.1000-1522.20190290
    引用本文: 吴义远, 董文渊, 刘培, 张孟楠, 谢泽轩, 田发坤. 不同土壤水分和养分条件下筇竹竹秆解剖特征及其适应可塑性[J]. 北京林业大学学报, 2020, 42(4): 80-90. DOI: 10.12171/j.1000-1522.20190290
    Wu Yiyuan, Dong Wenyuan, Liu Pei, Zhang Mengnan, Xie Zexuan, Tian Fakun. Anatomical characteristics and adaptability plasticity of Qiongzhuea tumidinoda stalk under different soil water and nutrient conditions[J]. Journal of Beijing Forestry University, 2020, 42(4): 80-90. DOI: 10.12171/j.1000-1522.20190290
    Citation: Wu Yiyuan, Dong Wenyuan, Liu Pei, Zhang Mengnan, Xie Zexuan, Tian Fakun. Anatomical characteristics and adaptability plasticity of Qiongzhuea tumidinoda stalk under different soil water and nutrient conditions[J]. Journal of Beijing Forestry University, 2020, 42(4): 80-90. DOI: 10.12171/j.1000-1522.20190290

    不同土壤水分和养分条件下筇竹竹秆解剖特征及其适应可塑性

    Anatomical characteristics and adaptability plasticity of Qiongzhuea tumidinoda stalk under different soil water and nutrient conditions

    • 摘要:
      目的为探究筇竹秆对不同土壤水分和养分条件的适应策略,本论文研究了不同土层厚度生境中的天然筇竹林竹秆解剖结构变化规律,旨在为筇竹工艺材用林培育提供理论指导。
      方法采用冗余分析与蒙特卡洛检验方法,分析了3种土层深度0 ~ 40 cm、0 ~ 80 cm和0 ~ 120 cm筇竹林竹秆解剖结构特征与土壤养分、水分的关系。
      结果(1)随着土壤水分和养分含量的递增,筇竹竹秆基本组织比量、维管束密度呈现显著递减的趋势(P < 0.05);而输导组织比量,纤维组织比量,维管束长、宽表现出明显递增的趋势(P < 0.05)。即与中土层及厚土层生境相比较,薄土层竹秆维管束产生了形状小、密度大的重要适应特征。(2)3种土层厚度生境中,薄土层生境筇竹竹秆组织比量和维管束大小的变异系数及可塑性指数均为最大。即与中土层及厚土层生境相比较,薄土层生境中竹秆维管束以更强的调节能力来适应低水分、养分的环境。(3)土壤水分和养分因子对筇竹秆解剖结构有着显著影响(P < 0.05),单一土壤因子对筇竹竹秆解剖结构影响的重要性大小排序为全K > 水解N > 速效K > 有效P > 全P > 全N > 含水量 > 有机碳 > 酸碱度。
      结论土壤水分和养分含量的不同是影响筇竹竹秆的解剖结构可塑性的根本原因,解剖结构可塑性使得筇竹在不同土层厚度生境中形成适应性差异,竹秆维管束的大小和密度呈现的明显可塑性,是筇竹对土壤因子产生的重要适应特征。竹秆解剖特征及其适应可塑性对筇竹适应土层厚度异质性具有重要生态作用。

       

      Abstract:
      Objective This paper aims to explore adaptive strategies of natural Qiongzhuea tumidinoda stalk under different soil water and nutrient conditions. We studied the changes of stalk anatomical structure of Q. tumidinoda in habitats with different soil thickness to provide theoretical guidance for the cultivation of processing timber forest of Q. tumidinoda.
      Method In this paper, we used redundant analysis and Monte Carlo test methods to analyze the relationship between stalk anatomical structure characteristics of Q. tumidinoda and soil nutrients and water in three soil layers of thin soil (0−40 cm), medium soil (0−80 cm) and thick soil layer (0−120 cm).
      Result(1) With the increase of soil moisture and nutrient content, the stalk anatomy of Q. tumidinoda had a significant decreasing trend of basic tissue ratio and vascular bundle density (P < 0.05). The ratio of transmission tissue, fiber tissue, length and width of vascular bundle showed an obvious increasing trend (P < 0.05), i.e. compared with the habitats in medium and thick soil layers, the vascular bundles of bamboo stalk in thin soil layers had important adaptability characteristics of small shape and large density. (2) Among three types of soil thickness habitats, the variation coefficient and plasticity index of Q. tumidinoda stalk tissue proportions and vascular bundle size in thin soil habitats were the largest, i.e. compared with the habitats in medium and thick soil layers, the vascular bundles of bamboo stalk in the habitats with thin soil layers had stronger regulation ability to adapt to the environment with low moisture and nutrients. (3) The stalk anatomical structure of Q. tumidinoda was affected by different degrees of soil moisture and nutrients (P < 0.05). Significance of single soil factor on the stalk anatomical structure of Q. tumidinoda was sequentially followed as total potassium > hydrolyzed potassium > available potassium > available phosphorus > total phosphorus > total nitrogen > water content > organic carbon > pH.
      Conclusion The difference in soil moisture and nutrient content is the root cause of stalk anatomical plasticity of Q. tumidinoda. Stalk anatomical plasticity makes Q. tumidinoda forming adaptive differences in different soil thickness habitats. The obvious plasticity of the size and density of bamboo vascular bundles is an important adaptation characteristic of Q. tumidinoda to soil factors. Anatomical characteristics of bamboo stalks and their adaptation plasticity play an important ecological role in adapting Q. tumidinoda to soil thickness heterogeneity.

       

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