| Popis: |
In this paper we tried to analyse agricultural land use changes in Beijing metropolitan region on the basis of available statistics and mesh data from 1978 to 1997. and make clear their spatio-temporal structure and driving forces. According to a series of analyses through these data, we could conclude that spatio-temporal changes of agricultural land use including agricultural productivity have had some sectorial differences rather than concentric differences since the 1980s. The sectorial structure of cultivated land is closely related to the distribution of land conditions such as mountains, hills, lower hills and lowlands, so that distributional patterns of agricultural land use are essentially determined by land conditions as one of driving forces. As regards food crops cultivation, its sectorial structure is closely related to the complex of land conditions, urbanisation, industrialisation, policies, infrastructure and innovation as driving forces. Although the sectorial structure in terms of vegetables cultivation is also closely related to available land conditions and urbanisation, it is more important for their production to develop or not to develop alternative economic activities with the growth of urbanisation and socialistic market economy. On the other hand, the sectorial structure of fruits production is most closely related to the enlargement of profitability with the growth of urbanisation and socialistic market economy rather than available land conditions and alternative economic activities. Following our discussion, it seems to be conclude that sectorial differences of agricultural land use changes in Beijing metropolitan region have been generally presented since the 1980s. This sectorial structure has been closely related to the complex of some driving forces that were consisted of land conditions, agricultural policies including the progress of infrastructure and innovation, and the alternative economic activity such as village and township enterprises, and urbanisation such as the growth of internal migration and metropolitan markets. Combination of these driving forces in one sector is distinctly different from that in other sectors, so that it leads to sectorial differences of agricultural land use changes. |
