Spatial–temporal distribution of farmland occupation and compensation and its impact on ecological service value in China from 1990 to 2021

作者：Yuhao Li, Shuhui Shangguan, Wenyu Li, Shuang Liu, Yijin Li, Rui Han, Jingwen Xu · 发表于：Scientific Reports · 年份：2025 · DOI：10.1038/s41598-025-98742-1 · 研究领域：Medicine

Land transformation during global urbanization has led to a sharp decrease in farmland, causing not only food security issues but also ecological problems. To address this issue, the Chinese government has implemented the Requisition–Compensation Balance Policy for Farmland (RCBF) in 1997. This policy effectively curbed the reduction of farmland, but the compensated land often comes from mountainous and desert areas, leading to fragmentation of farmland and subsequent ecological security issues. The balance between farmland requisition and compensation is closely related to ecological security. However, current research on farmland occupation and compensation is mostly based on farmland area. The area occupied and compensated for by farmland in different regions is inconsistent, and using only net increase or decrease in area to represent farmland occupation and compensation cannot accurately and fairly compare the degree of farmland occupation and compensation between regions. Therefore, this study has proposed a novel index to measure the balance of farmland requisition and compensation—the Farmland Requisition and Compensation Index (FOCI). FOCI can transform dimensional expressions that represent the area of farmland occupation and compensation into dimensionless expressions, namely scalars, which makes it possible to visually and fairly compare the degree of farmland occupation in each region. Then, this new index has been used to investigate the spatiotemporal evolution...