以北京大兴区为例,利用景观格局和空间分析方法,从产业布局和区位角度分析大城市边缘区土地利用空间分异特征.结果表明:(1)该区土地利用程度高,区域产业布局及距城市、村镇和道路距离等区位因素使其土地利用综合水平呈现北高南低、北部和南部区域内部重点镇高于一般镇的等级梯度分异格局.(2)设施农用地、园地和设施耕地等集约利用程度较高的农用地比例很大,集中分布在村镇和道路附近,生产便利性和成本是其空间分异的主要影响因素;(3)各类土地破碎化严重,集聚度和规模化程度低,亟需通过土地综合整治,重构村庄空间体系,充分发挥循环经济和农用地多功能性的优势,优化农业产业间及其与非农用地间的用地结构和空间布局,进一步提高土地利用综合效益.
A case study was done of Daxing District in Beijing, using the landscape pattern and spatial analysis method,to explore characteristics of spatial variation of land use in metropolitan suburban areas from the angle of distribution andlocation of different industries. Results show that 1) the district as a whole is high in land use rate, but not even. Thenorthern part is higher than the southern part in comprehensive level of land use as a result of distribution of different in-dustries and locations varying in distance from the city, towns, villages and roads, and key towns are higher than generaltowns in comprehensive level of land use; 2) agricultural lands high in intensity of land use, such as facilitated farmland,orchard land and facilitated arable land, account for a large percentage of all the agricultural land and are concentrated a-round the villages or towns and along the roads, of which the major affecting factors are convenience and cost of produc-tion; and 3) the land, regardless of its land use type, is high in fragmentation and low in agglomeration degree and scale.It is, therefore, urgent to reconstruct the village spatial system through rearrangement of the land, and optimize the landuse structure and spatial distribution of agricultural land and non-agricultural industrial land by making full use of the ad-vantages of circular economy and multi-functions of the farmland so as to further raise its comprehensive land use efficiency.