1.国外玉米收获机械发展概况20世纪末,经济发达国家已经实现玉米机械化收获,玉米收获机械的研究与生产技术已经成熟。法国、德国、乌克兰、俄罗斯等西方国家的玉米收获(包括籽粒和秸秆青贮)已基本实现了全部机械化作业。美国、加拿大等国家由于其种植地块大,且多为一年一季种植 1. Overview of foreign corn harvesting machinery development The late 20th century, economically developed countries have achieved mechanized harvest of corn, corn harvesting machinery research and production technology has matured. Harvesting of maize (including grain and straw silage) in western countries such as France, Germany, Ukraine and Russia has basically achieved full mechanization. The United States, Canada and other countries because of its large planting plots, and mostly planted year after year