关键词: 羊草, 盐碱胁迫, 灰绿型, 黄绿型, 松嫩平原

Abstract: An investigation was made on the population structure and community characteristics of Artemisia giraldii in different habitats in Erdos hilly and gully loess area of Inner Mongolia. On the sunny slope of the area, where the natural conditions were relatively poor, A. giraldii formed mono-dominant community, and the population structure was stable; on the shady slope where natural conditions were better, A. giraldii formed a community with Poa sphondylodes and Calamagrostis pseudophragmites, and the population structure was in improving; while on the top ridge where the conditions were superior, A. giraldii was a companion species. The A. giraldii on the shady slope had the largest expansion, and produced density effect within the population. On the sunny slope, the population expansion was inferior; while on the top ridge, the individuals within the population distributed independently. All the results indicated that in the habitats in gully and valley loess area, where the resources were redistributed, A. giraldii had its unique ecological adaptability, and made itself become a specific ‘gully and valley plant’.

Key words: Leymus chinensis, Salt-alkali stress, Grey-green ecotype, Yellow-green ecotype, Songnen Plains