玉米是北方主要粮食作物之一,栽培面积大、产量高。但是,由于多年的单一种植,造成土壤营养失词,再加之化肥的大量投入,致使土壤逐年板结,有机质明显下降,虽重视施用有机肥,可杯水车薪一时难以奏效。实践证明,采用机械作业进行根茬还田是解决上述问题的有效方法。据我们试验调查,连续6年进行根茬还田的地块,比传统的刨茬子搂茬子地块增产29.8%, Corn is one of the major northern food crops with a large cultivation area and high yield. However, due to many years of monoculture, resulting in loss of soil nutrition, coupled with a large number of inputs of fertilizers, resulting in soil compaction year after year, significantly decreased organic matter, although the emphasis on the application of organic fertilizer, can be a cup of water salary for a moment difficult to work. Practice has proved that the use of mechanical operations for crop stubble is an effective way to solve the above problems. According to our experimental investigation, for 6 years in a row of stubble plots, than the traditional planing stubble sub-blocks yield 29.8%