机构地区:[1]内蒙古农业大学沙漠治理学院,内蒙古呼和浩特010019 [2]呼和浩特市水资源与河湖保护中心,内蒙古呼和浩特010013 [3]内蒙古自治区包头市林业和草原局,内蒙古包头014030 [4]集宁师范学院地理科学与规划学院,内蒙古集宁012000 [5]奈曼旗草原工作站,内蒙古通辽028300
出 处:《水土保持通报》2024年第2期137-145,154,共10页Bulletin of Soil and Water Conservation
基 金: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)。
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(S_(p))≤1.44 m^(2)时,红砂灌丛沙堆的体积大于四合木灌丛沙堆,当S_(p)>1.44 m^(2)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 m^(3)。[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。[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]①Both 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).②There 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.③When the crown area(S_(p))was less than 1.44 m^(2),the volume of a Reaumuria soongorica shrub was larger than that of a Tetraena mongolica shrub.When S_(p)>1.44 m^(2),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
关 键 词:珍稀濒危植物 四合木 红砂 灌丛沙堆 西鄂尔多斯国家自然保护区
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