Abstract: Based on the presence-absence data from the investigation of the plant communities in Ebinur Lake wetland of Xinjiang, and by the methods of principal component analysis and cluster analysis, this paper studied the multiple interspecific associations and ecological species groups of the main plant species in the wetland. Compared with conventional paired-comparison framework, multiple comparison frameworks were more objective and effective. The main plant species in the wetland were divided into three main ecological species groups,and the plant species within each ecological species group possessed the similar habitats and ecological niches. According to the statistical analysis, and combining with the field survey, it was observed that the positive or negative associations between the main plant species and the division of the ecological species groups in Ebinur Lake wetland were mainly dependent on the adaptability of the plants to the habitat factors water and salt. It was more practical for the wetland ecological restoration and plant diversity protection from the view of multiple interspecific association and ecological species group, instead of a single species.

Key words: Wheat, Target yield, Variety selection, Knowledge model