玉米是山海关区主要栽培作物，其产量高低直接关系着当地粮食的总产量，有鉴于此，山海关区农技站在搞好玉米品比试验的基础上，首家推出了别具特色的玉米品种“绿色展厅”。即在交通便利的102国道旁，根据不同地形、地力，分别种植了两块“绿色展厅”，共14个玉米品种，每个品 Maize is the main cultivated crop in Shanhaiguan area. The output level of the maize is directly related to the total output of the local grain. Therefore, based on the corn ratio test, the agricultural station in Shanhaiguan District first introduced the unique corn variety “Green Hall.” That is, on the sidewalk of the 102 countries with convenient transportation, two “green exhibition halls” have been planted respectively according to different terrain and fertility. A total of 14 maize varieties have been planted. Each product