Abstract: Based on the investigation data of 216 sampling plots, and by using Shannon-Wiener and S￠rensen indices, this paper analyzed the spatial distribution pattern of wild vascular plant species diversity in Longjiao Mountain forest area.The results showed that the species diversity was lower in arbor layer, but higher in shrub layer and herb layer.The species diversity decreased gradually with increasing altitude.There was a certain difference of the wild vascular plant species diversity on different slope direction, with the sequence of north slope>east and west slope>south slope. Slope direction and altitude were the main factors affecting the spatial distribution pattern of wild vascular plant species diversity in the area.Slope direction also affected the species composition of the wild vascular plants, with the most obvious difference between north and south slope, and the least one between east and west slope. On this aspect, the effect of altitude was not so obvious.

Key words: Sinorhizobium fredii HN01DL, Glycine max rhizosphere, Root colonization, Nodulation, luxAB