我县滨江临海,热量资源一年两熟有余、三熟不足,在长期生产实践中,形成了麦(蚕豆)——春玉米——晚秋为主的旱粮三熟制,玉米为主产作物。但玉米生长期间旱、涝、暴雨,尤其是后期的大风、暴风、台风等自然灾害机率较高,影响高产稳产。如实行早播,由于早春地温回升慢,露地直播不易一播全苗,抽雄扬花期常因梅雨影响,年际间产量 My county Binhai Linhai, more than twice a year calorific resources resources, lack of three-cooked, in the long-term production practice, the formation of the wheat (broad bean) - spring corn - late autumn mainly dry food three cooked, corn-based crops . However, during the growth of maize, drought, floods and torrential rains, especially in the latter part of the country, have a higher probability of natural disasters, such as strong winds, storms and typhoons, affecting the high and stable yield. If the implementation of early sowing, early spring temperature rise slow, open seeding is not easy to broadcast a whole seedlings, tasseling flowering often due to the impact of the rainy season, annual production