引言夏玉米覆盖免耕播种 ,是随着我国小麦联合收获和秸秆还田机械化技术的发展 ,逐渐兴起的一项农业可持续发展新技术。它是在前茬小麦收获后 ,不对秸秆、根茬和土壤作任何处理的条件下 ,直接破茬开沟 ,一次完成化肥深施和玉米播种。几年的试验改进和示范推广证明 ,与小四轮拖 Introduction Summer corn covering no-till sowing is a new agricultural sustainable development technology that is gradually emerging with the development of mechanization of wheat harvesting and straw returning in our country. It is in the former crop of wheat harvest, not straw, stubble and soil for any treatment under the conditions of direct ditching ditching, a complete fertilizer and corn sowing. Several years of trial improvement and demonstration promotion proved that with the small four-wheel tow