葫芦岛市连山区现有耕地面积62.7万亩,其中玉米播种面积40万亩,占播种面积的63.8%。玉米生产直接影响连山区农业经济的发展。近年来,连山区不断改进玉米播种方法,推广新的密植型品种和“二比空”(3垄为一组,其中2垄种玉米,1垄为空垄)种植模式,玉米产量有了大幅提高,但是玉米“二比空” Lianshan District of Huludao City, the existing 62.7 hectares of arable land, of which 400,000 mu of corn sown area, accounting for 63.8% of sown area. Corn production directly affects the development of agricultural economy in Lianshan. In recent years, Lianshan District has been continuously improving maize planting methods, promoting new planting varieties and “two acreages” (three ridge groups, of which two ridge maize and one ridge are empty ridges). Maize yield A substantial increase, but corn “two more than empty ”