《JRS》｜Penghui et al：农田景观破碎化演化及其从农村到城市的驱动机制——以常州市为例
摘要：中国农田景观破碎化呈现出明显的“中心城区→城乡过渡区→农村”空间梯度演进趋势，具有城乡二元结构。本研究以常州市为例探讨了这种时空趋势的演变及其动力机制。构建景观分析模型进行像素级农田景观破碎化分析，采用梯度分析模型沿空间梯度“城市→过渡→农村”进行农田景观演化分析。研究期间边缘斑块耕地和离散斑块耕地净转入率分别为4.58%和3.63%，在常州传统农业环境背景下，农田景观在结构上有一定程度的碎片化。尽管如此，以核心农田和边缘农田为主的连片农田仍占耕地总面积的82.53%。因此，农田景观保持相对稳定。而在非农环境下，核心耕地净转出率为17.39%，核心耕地总量下降明显。梯度分析显示，常州农地景观演化的核心驱动力在于土地利用和管理相关的政策因素，分别占中心城区和农村农地景观演化的79.7%和60%。基本农田保全区和建设用地空间调控正向影响农田景观破碎化变化。因此，制定差异化的耕地管理政策，严格限制城市建设占用耕地资源，具有重要意义。
关键词：耕地；景观结构分类；地理梯度分析；驱动机制；耕地保护；城乡差异
Abstract: China's farmland landscape fragmentation follows a distinct evolutionary tendency along the spatial gradient “central urban areas → urban–rural transitional areas → rural areas”, because of its binary structure comprising urban and rural areas. This study explores the evolution of this spatiotemporal trend and its dynamic mechanisms in the case of Changzhou City. A landscape analysis model is constructed for farmland landscape fragmentation analysis at the pixel level, and a gradient analysis model is used for farmland landscape evolution analysis along the spatial gradient “urban → transitional → and rural areas”. During the study period, the net switching-in rates of edge patch farmland and discrete patch farmland were 4.58% and 3.63%, respectively, and farmland landscape tended to be somewhat structurally fragmented in the context of Changzhou's traditional agricultural environment. Nevertheless, contiguous farmland, dominated by core and edge farmland, still accounts for 82.53% of the total farmland area. Consequently, the farmland landscape remains relatively stable. In a non-farming environment, however, the net switching-out rate of core farmland reached 17.39%, and the total quantity of core farmland decreased significantly. Gradient analysis revealed that the core evolutionary driver for Changzhou's farmland landscape lies in policy factors relating to land utilisation and management, accounting for up to 79.7% and 60% of evolution in the farmland landscape within central urban areas and rural areas, respectively. Basic farmland preservation areas and spatial regulation of construction land positively affects farmland landscape fragmentation changes. Consequently, it is of great significance to formulate differentiated farmland management policies, and to place strict restrictions on the occupation of farmland resources for urban construction.
Keywords: Farmland；Landscape structure classification；Geographical gradient analysis；Driving mechanism；Farmland protection；Rural and urban difference
原文链接：
https://www.sciencedirect.com/science/article/pii/S0743016721000048
《Journal of Rural Studies》，最新影响因子为3.544，主要发表当代乡村社会、经济和文化、乡村性的定义和表征、乡村政策的制定、实施和论争以及人类与乡村环境的交互作用等，图片是涵盖乡村地理学、乡村社会学、农业和农村经济学、规划及相关学科的跨学科出版物。