由山东省农业机械科学研究所与海山机械制造有限公司联合研制开发的专利产品4YQW-2型茎穗兼收型背负式玉米联合收割机于2004年10月20日进行了玉米收获田间作业试验。该机型为背负式,可配套50马力或70马力拖拉机,集摘穗、秸秆粉碎、青贮收获、灭茬功能为一体,具有效率高、操作方 By the Shandong Provincial Institute of Agricultural Machinery and seamounts Machinery Manufacturing Co., Ltd. jointly developed a patented product 4YQW-2-type stem-spike and received back-type corn combine harvester on October 20, 2004 corn harvest field operation test. The model is knapsack, can be equipped with 50 horsepower or 70 horsepower tractor, set pick ears, straw crushing, silage harvest, stubble function as a whole, with high efficiency, the operator