水稻机械旱直播在我国有卅余年历史,它采用机械进行旱整地、旱播种,工效较高,在保证农时、播种均匀、避免水田繁重作业上,具有很大优越性。但发展不快,除土地条件、机具设备等原因外,在栽培技术上存在保苗、杂草两大问题。近年来,随着高效化学灭草药剂的推广,杂草问题已基本 It has a history of over thirty years in our country. It uses machinery for dry land preparation, dry seeding and high ergonomics. It has great superiority in guaranteeing agriculture, sowing evenly and avoiding heavy farm work. However, the development of unpleasant, in addition to land conditions, machinery and equipment and other reasons, there are seedlings in the cultivation of technology, weeds two major issues. In recent years, with the promotion of highly effective chemical herbicide, the weed problem has been basically solved