基于GlobeLand30的中国耕地占补平衡评价方法研究

A New Evaluation Method of Requisition-compensation Balance of Farmland in China Based on GlobeLand30

为加强耕地保护,我国提出耕地占补平衡政策。本文基于占补耕地统计分布直方图,研究一套多指标耕地占补平衡评估方法,采用GlobeLand 30的最新两期数据,在空间格局、自然条件、区位条件3方面建立评价体系,在省级尺度评价我国近10年耕地数量和质量的占补平衡关系。结果表明:在数量上,我国基本实现了耕地占补平衡,耕地面积总体呈现东南减小、西北增加的空间格局;在质量上,我国较好实现了耕地占补平衡,25个省的耕地质量提升,但存在耕地坡度增大、面积破碎化等问题。

To protect farmland better,China has proposed the requisition-compensation balance of farmland policy.Based on the statistical distribution histogram of requisitioned and compensatory farmland,we propose a new evaluation method of farmland requisition-compensation balance,using multiple indicators.In terms of pattern,natural conditions,and location factors,farmland of the last ten years has been evaluated in quantity and quality,based on the latest two periods of GlobeLand30.The results show that:the amount of farmland has basically achieved the goal of requisition-compensation balance.Farmland reduced in southeast China and increased in northwest China;the quality of farmland has achieved the goal of requisition-compensation balance well.Farmland quality improves in 25 provincial-level regions.However,some problems also exist,including increased slope and fragmented patches.