摘要
选择民勤境内4种主要荒漠植物群落，从生境条件和生态位2个方面进行了对比研究。结果表明：1）沙蒿Artemisiaarenaria、白刺Nitraria tangutorum、麻黄Ephedra przewalskii和梭梭Haloxylon aminodendron4种群落的土壤机械组成差异主要表现在〉0．05mm的土壤颗粒上，沙蒿和麻黄0．25～1．00mm的粗砂均较多，麻黄土壤中≥1．0mm的石砾含量最多，白刺土壤中0．05～0．25mm的细砂粒最多。援梭林地的全氮含量普遍高于其他3种群落；2）群落中优势种的生态位宽度最大，在4个优势种中，梭梭的生态位宽度最大，其次是麻黄，白刺的生态位宽度最小；3）沙蒿、沙米Agriophyllum squarrosum、沙拐枣的生境条件大致相同，五星蒿Bassia dasyphylla、沙米、盐生草Halogeton arachnoideus与白刺的生境条件大致相同，盐生草、刺蓬Salsola ikonnikovii、白刺、沙米与梭梭生境相近，泡泡刺与麻黄的生境相近。
The study selected 4 kinds of main eremophytes communities in Minqin and conducted comparative research in terms of habitat and niche. The results indicated that 1）differences of soil composition mainly demonstrated in 〉0. 05 mm soil particle of 4 kinds of communities such as Artemisia arenaria , Nitraria tangutorum , Ephedra przewalskii and Haloxylon arnmodendron. 0. 25 -1.00 mm coarse sand were rich in A. arenaria and E. przewalskii communities, ≥1.0 mm gravel was dominant in E. przewalskii soil, 0.05-0.25 mm fine sand were the most in N. tangutorum soil. Total Nitrogen content was higher in H. amrnodendron than other 3 communities. 2） The niche breadth of the dominant species was the biggest in the community, the niche breadth of H. amrnodendron was the biggest, followed by E. przewalskii, N. tangutorum had the smallest. 3） The habitat conditions of A. arenaria and A. squarrosum and Calligonum ongolicum were approximately the same, Bassia dasyphylla, Agriophyllum squarrosum, Halogeton arachnoideus and N. tangutorum had similar habitat, and the habitat conditions were close in N. sphaerocarpa and E. przewalskii.
出处
《草业科学》
CAS
CSCD
北大核心
2009年第7期12-18,共7页
Pratacultural Science
基金
国家"十五"重点科技攻关项目--内陆河下游绿洲型防沙治沙综合技术体系研究(2002BA517A-09)
关键词
植物群落
生境条件
生态位
民勤
plant community
habitat conditions
niche
Minqin
