Abstract: In this paper, spatial patterns of main species in grassland community in the recovering succession were measured with 7 indexes, such as dispersion index, clump index, mean crowding intensity, patchiness index, Green's index, the clump intensity index, the Chi-test for Poisson distribution and negative binomial distribution. Almost all of the spatial patterns of the main species of the grassland community in Horqin sandy land were clump. Clump distribution had the good advantage of promoting population invasion and inhabitation, promoting community formation and promoting vegetation restoration. In the process of community succession, the intensity of distribution pattern changed. This change could indicate population dynamics and pattern intensity which can be a measurement for spatial heterogeneity of community structure. The results of 7 measurements were the same, but the patchiness index, Green's index ,and the clump intensity index were more preferrable than the others.

Key words: Sogatella furcifera, Electronic monitoring, Feeding behavior, Virulence, Rice