盐爪爪沙堆形态特征及其固沙能力分析——以卡拉贝利工程区为例

An analysis on Kalidium foliatum morphology and the sand fixation ability of Nebkha——A case study in Cala Beili engineering area

根据2014年6月中旬卡拉贝利工程区现场实测数据,研究了两种立地条件下优势种群圆叶盐爪爪植物生长状况及其灌丛沙堆的形态特征,并分析了相互之间的统计关系,初步评价了圆叶盐爪爪的阻沙固沙能力。研究结果表明:不同立地条件,圆叶盐爪爪植物高度、沙堆高度、沙堆体积存在显著差异。土质地表植物平均高度略小于砾石地表,最大高度>砾石地表,土质地表沙堆平均高度>砾石地表,且最大沙堆高度、平均沙堆体积和单位冠幅面积拦截沙的体积均是砾石地表的3倍左右;沙堆(灌丛)形态特征间存在良好的相关性,沙堆(灌丛)能够保持协同发展,其形态具有稳定性,沙堆与灌丛形态特征间相关性也较好,沙堆高度、沙堆体积均随着灌丛冠幅、高度的增大而增大,但土质地表递增速度更快。从灌丛及沙堆形态的差异及相互关系,可以初步衡量出土质地表圆叶盐爪爪的固土能力大于砾石地表。

According to the data of plant and Nebkha measured in Cala Beili engineering area in 2014 mid June,we analyzed the morphological characteristics of Kalidium foliatum and the Nebkhas,their correlations,and the effects on the plant sand fixation ability. The results showed that plant height,nebkha height and volume are significantly different between different site conditions. The nebkha（ plant） can maintain coordinated development,so its shape is stable. Nebkhas and plants are moderately or highly correlated. Nebkhas height and volume are increased with the sand shrub crown width and height increasing,but nebkha in the soil surface increases faster.The fixation ability of Kalidium in different environment is： soil surface〉 gravel surface.