西鄂尔多斯地区四合木与红砂灌丛的阻沙能力对比研究
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Q948

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国家自然科学基金项目“荒漠灌丛空间构型对其‘肥岛’发育的作用机制”(41967009)


Comparative Study on Sand-blocking Ability of Tetraena Mongolica and Reaumuria Soongorica Shrubs in West Ordos Area
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    摘要:

    [目的] 对比分析西鄂尔多斯地区四合木与红砂灌丛的阻沙能力,为原生草原与荒漠过渡带植物的多样性保护和珍稀濒危物种保育提供理论依据与数据支持。 [方法] 以西鄂尔多斯国家级自然保护区内四合木(Tetraena mongolica)、红砂(Reaumuria soongorica)灌丛沙堆为研究对象,运用典型样方法对四合木和红砂灌丛沙堆形态与生长状况进行系统测定,探讨沙堆形态发育及阻沙能力与四合木和红砂灌丛形态的关系。 [结果] ①四合木和红砂灌丛沙堆均呈半椭球型发育,四合木灌丛沙堆形态参数显著大于红砂灌丛沙堆(p<0.05); ②四合木、红砂灌丛与沙堆形态参数间(灌丛高度除外)具有显著相关性(p<0.01)。四合木灌丛沙堆长轴、短轴、半径与高度之间均呈二次函数关系,表明四合木灌丛可能进入衰退阶段,而红砂灌丛沙堆长轴、短轴、半径与高度之间均呈线性关系,表明红砂灌丛沙堆仍在发育; ③当冠幅面积(Sp)≤1.44 m2时,红砂灌丛沙堆的体积大于四合木灌丛沙堆,当Sp>1.44 m2时,四合木灌丛沙堆的体积一直大于红砂灌丛沙堆。四合木和红砂灌丛单位冠幅面积所拦截的沙物质体积分别为0.13和0.06 m3。 [结论] 可以初步判断四合木的阻沙能力大于红砂。整体来看,四合木对风沙环境的适应性较红砂强,随着冠幅面积的增长四合木灌丛拦截沙物质的能力更强。

    Abstract:

    [Objective] The sand-blocking ability of Tetraena mongolica and Reaumuria soongorica shrubs were comparative studied in the West Ordos area in order to provide a theoretical basis and data support for the protection of plant diversity and conservation of rare and endangered species in the transition zone between native grassland and desert. [Methods] Nebkhas of Tetraena mongolica and Reaumuria soongorica were studied in the West Ordos National Nature Reserve. The morphology and growth of Tetraena mongolica and Reaumuria soongorica were systematically determined by typical sampling methods to determine the relationship between the morphology and development of nebkhas, and to determine the sand-blocking ability resulting from the specific morphology of Tetraena mongolica and Reaumuria soongorica. [Results] ① Both Tetraena mongolica and Reaumuria soongorica nebkhas showed a semi-ellipsoidal development strategy, and the morphological parameters of Tetraena mongolica nebkhas were significantly larger than those of Reaumuria soongorica nebkhas (p<0.05). ② There was a significant correlation (p<0.01) between both Tetraena mongolica and Reaumuria soongorica shrubs and the morphological parameters of sand piles (except shrub height). There were quadratic relationships between the long axis and height, the short axis and height, and the radius and height of sand piles for Tetraena mongolica, indicating that Tetraena mongolica may enter the declining stage. There were linear relationships between the long axis and height, the short axis and height, and the radius and height of sand piles for Reaumuria soongorica, indicating that Reaumuria soongorica nebkhas were still developing. ③ When the crown area (Sp) was less than 1.44 m2, the volume of a Reaumuria soongorica shrub was larger than that of a Tetraena mongolica shrub. When Sp>1.44 m2, the volume of a Tetraena mongolica shrub was always larger than that of a Reaumuria soongorica shrub. The sand volumes intercepted by a unit crown area of Tetraena mongolica and Reaumuria soongorica shrubs were 0.13 m3 and 0.06 m3, respectively. [Conclusion] It can be preliminarily surmised that the sand-blocking ability of Tetraena mongolica is greater than that of Reaumuria soongorica. Overall, the adaptability of Tetraena mongolica to a windy-sandy environment is greater than that of Reaumuria soongorica, and the ability of Tetraena mongolica to intercept sand material increases as crown area increases.

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闫宇,郭强,党晓宏,蒙仲举,高永,翟波,王紫薇,刘子剑.西鄂尔多斯地区四合木与红砂灌丛的阻沙能力对比研究[J].水土保持通报,2024,44(2):137-145,154

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  • 收稿日期:2023-12-10
  • 最后修改日期:2024-02-03
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