长期以来,有相当一部分地块采用拖拉机带动旋耕机来进行耕作,旋耕的深度比较浅,犁底层基本都在十几公分,不超过20 cm,犁底层作为一个瓶颈制约着玉米的产量,它限制着玉米根系下扎,限制着水分下渗,所以必须打破它。另外,玉米播种虽然也实现了机械化,但大多也不能实现单粒精准播种,施肥、追肥还比较传统,玉米间苗、施肥、追肥使劳动力投入较大。加上农村青壮年劳动力外出打工较多,农民在玉米施肥 For a long time, quite a few plots have been driven by tractors to cultivate the rotary tiller. The depth of rotary furrowing is relatively shallow. The plow bottom is basically a dozen centimeters and no more than 20 cm. The bottom of the plow restricts the corn yield as a bottleneck, It limits the maize roots under the bar, limiting water infiltration, it must break it. In addition, although the sowing of corn has also been mechanized, most of the crops can not be precisely sowed. Fertilization and top dressing are still relatively traditional. Maize mulching, fertilizing and top dressing make the labor input more. Coupled with rural labor work more young people go out, farmers fertilize corn