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沙地固定过程不同阶段优势植物种生态特性的比较研究
引用本文:张继义,赵哈林,张铜会,赵学勇.沙地固定过程不同阶段优势植物种生态特性的比较研究[J].水土保持通报,2004,24(5):1-4.
作者姓名:张继义  赵哈林  张铜会  赵学勇
作者单位:1. 兰州理工大学,甘肃,兰州,730050;中国科学院,寒区旱区环境与工程研究所,甘肃,兰州,730000
2. 中国科学院,寒区旱区环境与工程研究所,甘肃,兰州,730000
基金项目:国家973项目(G2000048704)
摘    要:流动沙地、半固定沙地、固定沙地是沙地固定过程几个明显的阶段,每一阶段发育着典型的群落类型,沙米(Agriophyllum squarrosum)、差巴嘎蒿(Artemisia halodendron)、隐子草(Cleistogenes squarrosa)分别是流动沙地、半固定沙地、固定沙地上群落的优势种。沙米种子圆而扁平的形态.种子萌发后胚根的快速伸长。是其适应流动沙地风沙环境的主要特征。沙埋促进生长,生长对水分条件的快速反应以及全季生长型特征是差巴嘎蒿在半固定沙地繁茂生长的主要原因。而隐子草则以增加根系生物量投入比例、须根系形态及其分布的浅表化来适应固定沙地的旱化土壤水分条件。

关 键 词:沙地固定过程  优势种  生态特性  植物
文章编号:1000-288X(2004)05-0001-04
收稿时间:2004/5/16 0:00:00
修稿时间:2004年5月16日

Ecological Characteristics of Dominant Species During Stabilization of Mobile Sand Dunes
ZHANG Ji-yi,ZHAO Ha-lin,ZHANG Tong-hui and ZHAO Xue-yong.Ecological Characteristics of Dominant Species During Stabilization of Mobile Sand Dunes[J].Bulletin of Soil and Water Conservation,2004,24(5):1-4.
Authors:ZHANG Ji-yi  ZHAO Ha-lin  ZHANG Tong-hui and ZHAO Xue-yong
Institution:Lanzhou University of Sciences and Enggineering, Lanzhou 730000, Gansu Prorince, China;Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, Gansu Prorince, China;Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, Gansu Prorince, China;Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, Gansu Prorince, China;Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, Gansu Prorince, China
Abstract:There are three stages in the stabilization process of sand dunes, namely mobility, semi-fixed and fixed. Agriophyllum squarrosum, Artemisia halodendron and Cleistogenes squarrosa are the dominant species of communities on mobile sand dunes, semi-fixed sand dunes and fixed sand dunes, respectively. Main adaptive characteristics of Agriophyllum squarrosum include flat-shaped seeds and rapid growth of embryo roots after germination. The vigorous growth of Artemisia halodendron in semi-fixed sand dunes is promoted by positive growth reaction to sand burial promoting growth, rapid reaction to changed soil water conditions and perennial growth. Cleistogenes squarrosa is adapted to the arid conditions of stabilized sand dunes due to its (ability) to increasing root biomass.
Keywords:stabilization process of sand dunes  dominant species  ecological characteristics
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