黑龙江省哈尔滨市呼兰区位于素称“世界三大黑土带”之一的松嫩平原中部,属于北温带大陆性季风气候,全年日照充足、雨热同季,非常适宜北方玉米生产。作为黑龙江省的产粮大区,呼兰区玉米年均种植面积一直稳定在165万亩左右,占全区总耕地面积的80%以上,是农业增产、农民增收的主要来源。为深度挖掘玉米增产潜力,呼兰区农业技术推广中心以技术创新为主攻方向,总结出以通透栽培、合理密植、精细管理为主体的玉米“215模式”高产栽 Hulan-dong, Harbin, Heilongjiang Province, is located in the central part of the Songnen Plain, one of the three major black-soil zones in the world. It belongs to the northern temperate continental monsoon climate with abundant sunshine throughout the year and rain and heat in the same season. It is very suitable for the production of northern corn. As a major grain-producing area in Heilongjiang Province, the average annual acreage of corn in Hulan has remained at about 1.65 million mu, accounting for more than 80% of the total arable land in the region. It is the main source of agricultural income increase and peasant income increase. In order to tap the potential of increasing corn yield, Hulan Agricultural Technology Promotion Center mainly focused on technological innovation, and concluded that corn, “215 model”, high-yielding planted with transparent cultivation, reasonable close planting and fine management