Abstract Cultivated land fragmentation (CLF) is a common phenomenon of land use in the world, which has an essential effect on agricultural production. Given the limitations of single level in the previous study on the influencing factors of CLF, this study utilizes hierarchical linear model (HLM) to explore the influencing factors of CLF from township and county levels in Jiangsu Province, and puts forward policy suggestions for relieving the CLF. The results indicate that the spatial distribution of CLF shows obvious characteristics in Jiangsu, which gradually increases from north to south. Besides, hierarchical structure exists in the CLF, and 43 % of the differences in CLF come from townships, 57 % from counties. Furthermore, the CLF is affected by multilevel factors, average patch area, GDP, the proportion of secondary and tertiary industries, population density, and road accessibility are the dominant factors at the township level, which explain 76 % of CLF affected by townships, and the main factors at the county level include average patch area, GDP, land use intensity, and urbanization rate, which explain 64 % of CLF affected by counties. Ultimately, a positive interaction with county-level overall guidance and township-level specific implementation should be established to alleviate the CLF. Specifically, at the county level, we should scientifically formulate overall planning of land use, and arrange land consolidation projects according to local conditions, readjust and optimize the economic structure, coordinate kinds of land demands and revitalize inefficient urban land. At the township level, while strictly implementing county-level policies, we should also promote land consolidation projects focusing on basic farmland construction and rural residential land readjustment, and pay attention to the overall layout of agricultural production factors, optimize industrial structure, and orderly transfer rural surplus laborers. This study provides a new perspective for the research on the influencing factors of CLF, and also has important guiding effect on formulating land policies to alleviate the CLF and accelerate sustainable utilization of cultivated land.

中文翻译：

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基于层次线性模型的耕地破碎化影响因素分析——以江苏省为例

摘要 耕地破碎化（CLF）是世界范围内普遍存在的土地利用现象，对农业生产有着重要的影响。鉴于前人对CLF影响因素研究的单一层面的局限性，本研究利用层次线性模型（HLM）从江苏省乡镇、县两级探讨CLF的影响因素，并提出缓解CLF的政策建议。 CLF。结果表明，CLF空间分布在江苏表现出明显的特征，由北向南逐渐增加。此外，CLF 存在等级结构，CLF 差异的43%来自乡镇，57%来自县。此外，CLF受多层次因素影响，平均斑块面积、GDP、二三产业比重、人口密度和道路可达性是乡镇层面的主导因素，解释了 76% 的 CLF 受乡镇影响，县层面的主要因素包括平均斑块面积、GDP、土地利用强度和城镇化率，这解释了64% 的 CLF 受县影响。最终，应建立与县级总体指导和乡级具体实施的良性互动，以缓解 CLF。具体到县级，要科学制定土地利用总体规划，因地制宜安排土地整理项目，调整优化经济结构，协调各类土地需求，盘活低效城市用地。在乡镇层面，在严格执行县级政策的同时，推进以基本农田建设和农村居民点调整为重点的土地整理工程，注重农业生产要素整体布局，优化产业结构，有序转移农村剩余劳动力。本研究为CLF影响因素的研究提供了新的视角，对制定土地政策以缓解CLF、加快耕地可持续利用具有重要的指导作用。