河北省耕地功能供需转型时空演变及利用分区

目的]以河北省县域为研究单元,测算耕地多功能供需转型的幅度与速度,探寻耕地多功能利用的优化路径。方法]基于土地利用现状数据及社会经济数据,采用价值量法测算2000年、2010年、2018年各单元耕地功能供需水平,利用四象限模型实现河北省县域耕地利用分区。结果]研究期内,河北省绝大部分县域耕地功能供给量和需求量增加,耕地功能供给量分布为东高西低; 耕地功能需求量集中分布于环京津的沧州市、廊坊市和唐山市。河北省耕地功能供给转型幅度高值区为承德市、秦皇岛市和唐山市,耕地功能需求转型幅度高值区为京津周边的沧州市、廊坊市和唐山市; 河北省大多县域耕地功能供需转型速度逐步提升,从空间分布看承德市耕地功能供给转型速度快,廊坊市和唐山市耕地功能需求转型速度快。结论]河北省耕地功能供需匹配由盈余转为赤字,耕地利用分区研究为高供给高需求、高供给低需求、低供给高需求和低供给低需求4类耕地功能区提供优化路径。

Spatiotemporal Evolution and Subarea of Cultivated Land Function Supply-Demand Transition in Hebei Province

Objective]Taking county in Hebei as the research unit, we analyzed the range and velocity of cultivated land function supply and demand transition, explored the optimal path of functional utilization of cultivated land. Methods] Based on the current land use data and social and economic data, the functional supply and demand levels of cultivated land in 2000, 2010 and 2018 were calculated by the value quantity method, and the four-quadrant model was used to realize the zoning of cultivated land use at county scale in Hebei Province. Results] During the study period, the supply and demand of cultivated land function increased in most counties of Hebei Province, and the distribution of cultivated land function supply was high in the east and low in the west. The functional demand for cultivated land concentrated in Cangzhou, Langfang and Tangshan around Beijing and Tianjin. Chengde City, Qinhuangdao City and Tangshan City had higher transition range of cultivated land function supply in Hebei Province, and Cangzhou City, Langfang City and Tangshan City had higher transition range of cultivated land function demand. The transition speed of cultivated land function supply and demand in most districts and counties of Hebei Province gradually increased. From the perspective of spatial distribution, the transition speed of cultivated land function supply and demand in Chengde City was faster, while that in Langfang and Tangshan City was faster. Conclusion] The matching of cultivated land function supply and demand in Hebei Province turned from surplus to deficit. The study on the zoning of cultivated land utilization provides an optimization path for four types of functional areas: high supply and high demand, high supply and low demand, low supply and high demand, and low supply and low demand.