摘要
介绍了国外几种种床开沟器的结构、工作原理，根据我国北方农村实际生产状况、农业机械条件，为适应小型玉米免耕播种机的需要，试验研究了铧式种床开沟器，主要性能为：开出的种床深３０～８０ｍｍ，宽１００ｍｍ，工作速度１０ｋｍ／ｈ．
Based on the introduction of the structure, working principle of some foreign seedbed ditching maceines, the present field working condition on North China and to cooperate with the small-sized corn sowing machines on non-ploughed field ,we stueded and designed the ploughshare shaped seedbed ditching machines whose main functions were that the ditchedseedbed was 30～80mm deep and 100mm wide and the speed was 10km/h.
