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中国粮食主产区耕地撂荒程度及其对粮食产量的影响
李雨凌1,2(), 马雯秋1,2,3, 姜广辉1,2(), 李广泳4, 周丁扬1,2
The degree of cultivated land abandonment and its influence on grain yield in main grain producing areas of China
LI Yu-ling1,2(), MA Wen-qiu1,2,3, JIANG Guang-hui1,2(), LI Guang-yong4, ZHOU Ding-yang1,2

图2. 撂荒规模空间分布及核密度分布
注:本图基于自然资源部标准地图服务系统下载的标准地图制作,底图无修改。

Fig. 2. Spatial distribution and nuclear density distribution of abandoned area