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近20年中国粮食生产变化特征及其对区域粮食供需格局的影响
刘正佳1,2,3(), 钟会民1,2, 李裕瑞1,2, 文琦4(), 刘雪琦5, 简钰清6
Change in grain production in China and its impacts on spatial supply and demand distributions in recent two decades
LIU Zheng-jia1,2,3(), ZHONG Hui-min1,2, LI Yu-rui1,2, WEN Qi4(), LIU Xue-qi5, JIAN Yu-qing6

图1. 1999—2018年全国和南/北方的粮食总产量变化情况

Fig. 1. Trends of total grain yield in China in 1999-2018