| Based on the GIS software Arcview and statistics software Fragstats of landscape index,using landscape ecological principles,this paper took the Feixi county as an example,analyzed the landscape structure and changes of the region in 1985,1995 and 2002.Meanwhile,the dynamics of Feixi county landscape pattern were simulated by Markov model.The paper chose seven landscape indices of Feixi in 1995 and analyzed grain effect.Finally,some appropriate suggestions were proposed,according to the principles of ecological construction.We reached some conclusions of the analysis of the changes of landscape pattern in Feixi county.Analysis of landscape level showed that the multi-factor landscape classification system could reflect the regional landscape characters.From 1985 to 1995,landscape fragmentation,landscape connectivity,landscape contagion and landscape diversity were decreased;the landscape shape became relatively regulation,landscape dominance and landscape evenness were increased.From 1995 to 2002,the landscape shape of Feixi county became complexity,landscape dominance,landscape contagion and landscape connectivity were decreased,the number of patch,landscape fragmentation,landscape diversity and landscape evenness were increased.Analysis of Landscape types level showed that paddy field of plain mainly decresed in Feixi county,and was dominant to control landscape structure,function and dynamic processes.The patches of woodland,grassland and building plot were in the form of mosaic.The area of paddy field of plain was decreased gradually,the number of patch was increased gradually,the number of patch and the area of the building land were increased gradually.The landscape shape index of paddy field of plain and rural inhabitation were the most complex,the landscape dominance of paddy field of plain was the largest one,the landscape connectivity was the best,the landscape inlay was the highest.Transfer matrix calculations indicated that the area of shrubbery and reservoir were increased,but was very little;the area of grassland was decreased and the proportion was very small;the area of canals was obviously decreased,the proportion of town and other construction land were increased with relatively large scale.Meanwhile,the proportion of rural inhabitation was decreased gradually,but was not large.With the area of construction and other land increasing,the area of the paddy field of plain and dry field of plain were obviously reduced,and the other landscape types almost had no change.Landscape map of Feixi county in 1995 at 1:50000 scale were converted to grid data of 14 grain sizes from 20m to 150m,Fragstats software was used to get six landscape indices to analysis Feixi county's landscape pattern changes with grain size increasing. Results showed that all of landscape indices had obvious grain effect with grain size changing.According to the relationship of grain effect,six indices were divided into three types.Edge density,the mean shape index and contagion were included in the first type, perimeter-area fractal dimension index was included in the second type,the largest patch index,landscape simpson diversity index and simpson evenness index were included in the third type.Three indices of the first type decreased with increasing of grain size,showing an obvious scaling relation(correlation coefficient are 0.9766,0.9833 and 0.9837 respectively).The second type indices increased with the changing of grain size,and it had obvious scale inflexions.Only the Perimeter-Area fractal dimension belonged to this type in our study(correlation coefficient is 0.9245).Indices of the third type showed more complex grain effect relation with the grain increasing and they had unconspicuous regulation.According to actual characters of Feixi county,from the view of landscape ecology, this paper gave some suggestions to the construction of Feixi county which including ecological forestry,ecological agriculture,ecological industry,ecological tourism and ecological county.
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