美国、法国、乌克兰等国家，玉米的收获已基本上实现了机械化。由于其多为一年一季种植，他们玉米收获都采用直接收获方式，一次作业可完成摘穗、脱粒，而对秸秆处理质量要求不高。这种收获方式不适应我国国情，尤其是小麦、玉米一年两熟种植区，一方面玉米收获时籽粒含水率高? The United States, France, Ukraine and other countries, corn harvest has basically achieved the mechanization. Because it is mostly planted one year a year, they are harvested by direct harvesting of corn, a job can be completed pick spike, threshing, while the straw processing quality is not demanding. This harvest does not adapt to China’s national conditions, especially wheat, corn two-year planting areas, corn harvest on the one hand when the grain moisture content is high?