School of Public Administration and Policy, Renmin University of China, Beijing, 100872, PR China.
School of Information Resource Management, Renmin University of China, Beijing, 100872, PR China.
J Environ Manage. 2020 Dec 1;275:111050. doi: 10.1016/j.jenvman.2020.111050. Epub 2020 Aug 28.
An urban agglomeration is a highly connected city group, which is nested in complex trading networks. Ignoring the intercity connections and regional inequality may lead to the unsustainability of the urban agglomeration. The misuse and overuse of cultivated land resources are threatening environmental sustainability and causing global climate change. Facing the inequality and environment pressures in the urban agglomeration, the cultivated land resource reallocation within the complex urban agglomeration trading network should be systematically explored. This study analyzes the virtual cultivated land flows of the Jing-Jin-Ji (JJJ) region embodied in China's interregional trade network using a multiregional input-output model. Results show that the average virtual cultivated land intensity of the JJJ region is 1.59 ha/million yuan, which is below the national average. The JJJ region has 10.74 million ha of embodied cultivated land in consumption, accounting for 7.82% of the country's total amount. JJJ region is an import-oriented region and it receives virtual cultivated land from surrounding underdeveloped regions, such as Heilongjiang and Inner Mongolia. Beijing and Tianjin are typical net importers of virtual cultivated land, while Zhangjiakou, Xingtai, Hengshui, Baoding, and Cangzhou are net exporters in the interior of the JJJ region. This study could provide a systematical perspective and data supporting system for formulating the sustainable cultivated land use policies and collaborated development policies in the JJJ region to mitigate regional inequality. Policy suggestions concerning the eco-compensation mechanism, collaborative innovation mode, and uniform management platform in JJJ are given.
城市群是高度互联的城市群体，嵌套在复杂的贸易网络中。忽视城市间的联系和区域不平等可能会导致城市群的不可持续性。耕地资源的滥用和过度使用正在威胁环境可持续性，并导致全球气候变化。面对城市群中的不平等和环境压力，应该系统地探索复杂城市群贸易网络中耕地资源的再分配。本研究使用多区域投入产出模型分析了中国区域间贸易网络中所体现的京津冀（JJJ）地区的虚拟耕地流动。结果表明，JJJ 地区的平均虚拟耕地强度为 1.59 公顷/百万元，低于全国平均水平。JJJ 地区在消费中包含了 1074 万公顷的耕地，占全国总量的 7.82%。JJJ 地区是一个进口导向型地区，它从周边欠发达地区，如黑龙江和内蒙古，接收虚拟耕地。北京和天津是典型的虚拟耕地净进口地区，而张家口、邢台、衡水、保定和沧州则是 JJJ 地区内部的净出口地区。本研究可为京津冀地区制定可持续耕地利用政策和协同发展政策提供系统的视角和数据支持，以缓解区域不平等。针对京津冀地区生态补偿机制、协同创新模式和统一管理平台提出了政策建议。
