中国玉米生产格局在长期演变中逐步形成了特征明显的三大区域,依据玉米种植的区域差异特性和产量变化趋势,本研究将中国玉米生产格局分为北部、中部和南部产区,对三大区域玉米总产量及玉米增长率的因素贡献进行分解,结论是单产和种植面积对三大区域总产量增长的贡献率存在着较大差异,其中北部产区玉米总产量增加主要来自种植面积增加;中部产区玉米总产量的增加主要来自种植面积增加和单产水平提高的双重贡献;而南部产区玉米总产量增加则主要来自单产水平的提高。总体而言,中国玉米单产和种植面积均呈现上升趋势,但种植面积扩大是玉米产量不断增加的主要原因。
Pattern of maize production in China gradually formed in the long-term evolution into three distinct regions. Accord-ing to the regional differences, corn and grain yield change trend, and pattern of maize production in China, it can be di-vided into northern, central and southern regions. This study is focused on maize yield and maize crop growth factor decom-position in the three regions. It is concluded that yield and each area’s contribution to the three regional output growth is different as such: the northern region production increase mainly comes from the planting area increase, central region in-crease mainly from corn planting area and yield increase contribution, and the southern region of corn production increases mainly from the improvement of yield. In general, there is a tendency of increasing maize yield and planting area in China, but the planting area of expansion is the main cause of corn yield increase.