%0 Journal Article %A DU Zhong-Yu %A DUAN Yi-Zhong %A KANG Fu-Ren %T Community Characteristics of Endangered Plant of Ammopiptanthus mongolicus to Environmental Factors in Northwest Arid Area of China %D 2018 %R 10.7525/j.issn.1673-5102.2018.06.006 %J Bulletin of Botanical Research %P 834-842 %V 38 %N 6 %X Ammopiptanthus mongolicus is one of the constructive species in northwest arid area of China, it is important for ecologically fragile in northwest arid area. We studied the communities of species composition, density and coverage of A.mongolicus using a sample plot method in filed, and analyzed the relationships between plant community and environmental factors. They were classified by the two-way indicator species analysis method (TWINSPAN) and redundancy analysis (RDA). The results show that:(1) There are 21 families and 50 genera and 70 species of A.mongolicus community in which the species numbers of Chenopodiaceae, Gramineae, Leguminosae, Compositae and Zygophyllaceae. The flora of community of A.mongolicus is mainly distributed in Temperate, Mdeiteranean and Central Asia to west Asia; (2) Based the two-way indicator species analysis method (TWINSPAN), 17 quadrats were classified into 6 associations, they are Ammopiptanthus mongolicus-Nitraria tangutorum-Artemisia scoparia, Ammopiptanthus mongolicus-Caragana korshinskii-Suaeda glauca, Ammopiptanthus mongolicus-Amygdalus mongolica-Heteropappus altaicus, Ammopiptanthus mongolicus-Ziziphus jujuba var. Spinosa-Allium mongolicum, Ammopiptanthus mongolicus-Ceratoides latens-Artemisia annua, Ammopiptanthus mongolicus-Sarcozygium xanthoxylon-Peganum harmala; (3) The main influencing factors for A.mongolicus community is the interaction of environment factors. %U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2018.06.006