摘要
【目的】白刺(Nitraria tangutorum)灌丛沙堆是吉兰泰荒漠绿洲过渡带第一道生态防线,其形成与演化对绿洲防风固沙具有重要意义。定量分析不同沙地类型上白刺灌丛和沙堆形态参数的差异性,有助于探明沙地类型对白刺灌丛沙堆演化的影响。【方法】以不同流动沙地、半固定沙地和固定沙地等3种沙地类型白刺灌丛沙堆为研究对象,运用典型样方法对白刺灌丛沙堆形态与生长状况进行系统测定。【结果】①白刺灌丛沙堆的形态以椭圆形为主,半固定沙地、固定沙地白刺灌丛沙堆长轴(L)、短轴(W)、沙堆高(H)、水平尺度(D)、底面积(A)和体积(V)显著高于流动沙地(P<0.05)。②3种沙地类型白刺灌丛沙堆L与W呈一元线性关系,而白刺灌丛沙堆D与H、A与H、V与H和A与V均呈二次函数关系。③半固定沙地和固定沙地白刺灌丛沙堆植被盖度(C)、灌丛高度(h)和枝系密度(M)显著高于流动沙地(P<0.05),植被盖度比流动沙地分别增加62.35%和51.08%(P<0.05),灌丛高度分别增加35.84%和38.51%(P<0.05),枝系密度分别增加61.58%和72.77%(P<0.05)。【结论】随着吉兰泰荒漠绿洲过渡带沙地的固定,白刺灌丛沙堆固沙能力增强,且灌丛生长状况越好,更新能力越强。
【Objective】Nitraria tangutorum nebkhas are the first ecological line of defense in the desert-oasis ecotone of Jilantai.The formation and evolution of these nebkhas are important for oasis wind prevention and sand fixation.【Method】In this study,the morphological and growth characteristics of N.tangutorum nebkhas in different sand types(shifting sandy land,semi-fixed sandy land and fixed sandy land)were systematically determined using typical quadrat sampling methods.【Result】The morphology of N.tangutorum nebkhas was mainly elliptical.The length(L),width(W),height(h),horizontal scale(D),bottom area(A)and volume(V)of N.tangutorum nebkhas were significantly higher in semi-fixed and fixed sandy lands than in shifting sandy land(P<0.05).For the morphological parameters of N.tangutorum nebkhas,there was a highly significant linear relationship between L and W in the three sandy lands.However,quadratic functional relationships were observed between D and H,A and H,V and H,and A and V in N.tangutorum.Vegetation coverage(C),shrub height(h),and branch density(M)of N.tangutorum nebkhas in semi-fixed and fixed sandy lands were significantly higher than those in shifting sandy lands(P<0.05).Compared to shifting sandy lands,C of N.tangutorum nebkhas in semi-fixed and fixed sandy lands increased by 62.35%and 51.08%(P<0.05),shrub height(h)increased by 35.84%and 38.51%(P<0.05),and M increased by 61.58%and 72.77%(P<0.05),respectively.【Conclusion】The sand fixation capacity of N.tangutorum nebkhas was higher with the fixation of sandy lands.N.tangutorum shrubs grew well and the regeneration ability increased gradually with the fixation of sandy lands.
作者
魏亚娟
郭靖
党晓宏
解云虎
汪季
李小乐
吴慧敏
WEI Yajuan;GUO Jing;DANG Xiaohong;Xie Yunhu;WANG Ji;LI Xiaole;WU Huimin(Department of Resource and Environment,Baotou Teachers’College,Baotou 014030,China;College of Desert Control Science and Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China;Inner Mongolia Baotou Steel Rare Earth Steel Plate Co.,Ltd.,Baotou 014010,China;Baotou Forestry and Grassland Bureau,Baotou 014010,China)
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2023年第5期172-180,共9页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
国家自然科学基金项目(41967009)。
关键词
白刺灌丛沙堆
形态特征
生长特性
荒漠绿洲过渡带
吉兰泰
Nitraria tangutorum nebkha
morphological characteristics
growth characteristics
desert-oasis ecotone
Jilantai
