Abstract: Land use change is a self-organized behavior of conversion from low niche level to high level.On the basis of niche theory,this paper applied land use niche models to quantitatively analyze the land use quantity niche and economic niche.The study shows that the cultivated land quantity niche is the highest,followed by grassland,woodland and urban villages and industrial land,transportation land quantity niche is the lowest.During the years of 2000—2009,cultivated land and grassland showed a general downward trend,garden,woodland,urban villages and industrial land and transportation land were in an overall upward trend in the niche.There is a different niche between agricultural land and construction land,and economic development and urbanization process make the the difference between the two further widen in Shijiazhuang City.Finally,according to the characteristics of different types of land use,this paper discusses the approach of sustainable land use from the perspective of improving economic niche.

Key words: land use, quantity niche, economic niche, sustainable development, Shijiazhuang City