不同立地条件簇生形态梭梭固沙特征分析  

Analysis on Sand Fxation Characterization of Clustered Haloxylon ammodendron with Different Site Conditions

作　　者：管庆伟 王鸿民 GUAN Qingwei;WANG Hongmin(Forestry and grassland Service center of the 5th Division of Xinjiang Production and Construction Corps,Shuanghe 833400,China;Agricultual College of Shihezi University,Xinjiang,Shihezi 832003,China)

机构地区：[1]新疆生产建设兵团第五师林业和草原服务中心,新疆双河833400 [2]石河子大学农学院,新疆石河子832003

出　　处：《内蒙古林业科技》2024年第3期27-31,共5页Journal of Inner Mongolia Forestry Science and Technology

摘　　要：梭梭(Haloxylon ammodendron)是新疆境内分布最广、面积最大的沙生植物,具有单株和簇生2种生长形态,簇生形态梭梭基部形成沙堆,对移动沙丘有显著的固定效果,其基部沙堆的高低反映固沙能力的强弱。为探究不同立地条件下簇生形态梭梭固沙能力,以及影响簇生形态梭梭固沙能力的形态学指标,本研究以精河县甘家湖、石河子市149团、五家渠市103团簇生形态梭梭为研究对象,实地测量簇生形态梭梭在3种立地条件(迎风坡、垄顶、丘间)的株高、分枝数量、冠幅、分枝基径及基部沙堆厚度,计算沙堆厚度和簇生形态梭梭4个形态指标之间的相关系数。结果表明:(1)簇生形态梭梭基部沙堆厚度与立地条件间无显著相关性,但是丘间更有利于簇生形态梭梭积沙;(2)簇生形态梭梭基部沙堆厚度与冠幅和分枝基径极显著相关(P<0.01),相关系数分别达到0.726和0.676,与梭梭株高显著相关(P<0.05),簇生形态梭梭固沙能力主要由冠幅决定,其次是分枝基径和株高。Haloxylon ammodendron is the most widely distributed and largest psammophilous vegetation in Xinjiang,with two growth forms:monocot and clustered.The sandpile formed at the base of the cluster form has a significant fixation effect on the moving dune,and the height of the sand pile at the stem base reflects its sand-fixing ability.In order to explore the sand-fixing ability of the cluster form of Haloxylon ammodendron under different site conditions and the morphological indexes affecting the sand-fixing ability of the cluster form,the present study took Haloxylon ammodendron with cluster morphology in Ganjia Lake,149 Group of Shihezi and 103 Group in Wujiaqu as the research objects.The height,branch number,total crown width,branch basal diameter and sandpile thickness in stem base of Haloxylon ammodendron with cluster morphology in three site conditions(windward slope,crest and interdune)were measured,and the correlation coefficient between the thickness of sand accumulation and morphological indexes of Haloxylon ammodendron with cluster morphology was calculated.The results showed that:(1)There was no significant correlation between the sand accumulation at the base of the clustered form of Haloxylon ammodendron and the site conditions,but the interdune was more conducive to the sand accumulation in the clustered form of Haloxylon ammodendron(.2)The sand dune thickness at the stem base of Haloxylon ammodendron was significantly correlated with the total crown width and branch basal diameter(P<0.01),with the correlation coefficients of 0.726 and 0.676,and with the height of Haloxylon ammodendron(P<0.05).The sand fixation ability of Haloxylon ammodendron was mainly determined by the total crown width,followed by branch base diameter,and finally height.

关 键 词：梭梭 立地条件 形态 固沙能力 

分 类 号：Q948.1[生物学—植物学]