遥感的周期性、宏观性等特点使其适用于农作物监测，为了解近年来黄淮海平原夏玉米种植分布的空间变化，基于MOD09A1时间序列数据提取研究区夏玉米MODIS NDVI时间序列曲线，通过计算欧式距离、设置阈值提取得到黄淮海夏玉米种植区域。在此基础上，通过图像叠合等方法对2010-2018年黄淮海夏玉米进行变化监测。结果表明：1、通过该方法可以较为准确地提取大区域尺度范围的夏玉米。2、近年来黄淮海地区夏玉米种植面积呈波动增加趋势，2017年、2018年种植面积大幅度增加。2010-2018年夏玉米种植重心集中在山东省聊城市，总体较为稳定，重心向西南方向迁移了13.32km。2010-2018年夏玉米种植面积在纬向呈向北扩展趋势，在经向变化不大。3、玉米种植信息变化受到气候变化、政策驱动、社会发展等因素的综合影响，气候变暖与玉米种植面积具有正相关性。

Remote sensing of periodic, macroscopic characteristics make it suitable for crop monitoring.To understand spatial variation of the distribution of summer corn in the plain in recent years,we use MOD09A1 time series data to extract summer maize in Huanghuaihai Plain.On this basis, the changes of summer maize in the Huanghuaihai Plain from 2010 to 2018 were monitored by means of image superposition.The results show that: 1. Summer maize of large regional scale can be accurately extracted by this method; 2. In recent years, the planting area of summer maize in the huang-huai-hai region has shown a trend of increasing fluctuation.From 2010 to 2018, the focus of summer maize planting was concentrated in liaocheng city, shandong province, which was relatively stable on the whole. The center of gravity shifted 13.32 km to the southwest.From 2010 to 2018, the planting area of maize in summer showed a trend of expanding northward in the latitudinal direction, with little change in the meridional direction.3. The change of maize planting information is comprehensively influenced by climate change, policy-driven, social development and other factors, and climate warming has a positive effect on the change of maize planting area.