玉米是我国三大粮食作物,玉米联合收割机的研制生产与推广应用,始终是农机化的一个热点与难点。目前,我国已有60多家企业生产出20余种、80多个机型的联合收割机,但一直没有解决好果穗去除苞皮的关键问题。一、玉米的概况玉米为高杆作物,其形状独特,由茎杆、枝叶、果穗组成,在一年的生长 Corn is China’s three major grain crops, corn combine harvester development and production and promotion of agricultural mechanization has always been a hot and difficult. At present, China has more than 60 enterprises to produce more than 20 species, more than 80 models of combine harvester, but has failed to solve the ear to remove the key issues of the bract. First, the corn profile Corn is a tall crop, its unique shape, composed of stems, leaves, ear, the growth of a year