高青县青城镇香姚村农民姚承峰是一位老农机手,在跨区作业中,他发现自走式小麦联合收割机由于作业时经常出现堵塞、漏籽、筛选不干净等故障。机手常常为提高收割速度而提高割茬,导致麦茬过 Yao Qingfeng, a farmer in Xiangyao Village, Qingcheng Town, Gaoqing County, is an old farmer. In cross-farm operations, he found that self-propelled wheat combine harvesters often have clogs, leaky seeds and poorly-selected filters during operation. The hands are often raised to improve cutting speed and cut stubble, leading to stubble over