School of Public Policy and Management, China University of Mining and Technology, Xuzhou 221116, China.
School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China.
Int J Environ Res Public Health. 2022 Dec 8;19(24):16478. doi: 10.3390/ijerph192416478.
Under the background of green development, the spatial structure of urban agglomerations (UA) has an important impact on urban land use efficiency (ULUE), but few studies have explored the impact mechanism between the two. This research explores the impacts of polycentric development on ULUE of UA, using data for 140 cities in China's top ten key UA covering the period from 2004-2019. The linkage between polycentric development and ULUE is explored by estimating models of determinants of ULUE. This research also examines the mechanism of the polycentric spatial structure of UA on ULUE by using a moderated mediation model. The main findings of the research can be concluded as below. The eastern UAs show a mostly polycentric spatial structure, whereas the central and western UAs show a weak polycentric spatial structure. The polycentric spatial structure of UA has a positive impact on ULUE. An inverted U-shape curve depicts the relationship between the polycentric spatial structure of UA and ULUE. However, the mediating variables, integration of industrial structure and factor mobility have a positive and partially mediating effect between the polycentric spatial structure of UA and ULUE. The infrastructure level has a positive U-shaped regulation effect, in which the impact coefficient of transport infrastructure is more significant. These findings provide empirical evidence for the coordinated development of China's regional space planning and ULUE.
在绿色发展背景下，城市群空间结构对城市土地利用效率（ULUE）有重要影响，但鲜有研究探讨两者之间的影响机制。本研究使用中国十大重点城市群的 140 个城市 2004-2019 年的数据，探讨了多中心化发展对城市群 ULUE 的影响。通过估计 ULUE 决定因素的模型，探讨了多中心化发展与 ULUE 之间的联系。本研究还通过调节中介模型，检验了城市群多中心化空间结构对 ULUE 的作用机制。研究的主要结论如下：东部城市群表现出较强的多中心化空间结构，而中部和西部地区城市群表现出较弱的多中心化空间结构。城市群的多中心化空间结构对 ULUE 有正向影响。城市群的多中心化空间结构与 ULUE 之间存在倒 U 型关系。然而，中介变量，产业结构融合度和要素流动性在城市群的多中心化空间结构与 ULUE 之间具有正向的部分中介效应。基础设施水平具有正向 U 型调节作用，其中交通基础设施的影响系数更为显著。这些发现为中国区域空间规划和 ULUE 的协调发展提供了经验证据。
