玉米是黑龙江垦区的主要粮食作物之一。十多年来,这个垦区种植玉米的面积不断在扩大,产量不断在增加。按自然区划,多种、种好玉米,对于提高单位面积产量,提高劳动生产率和商品率,以及促进畜牧业的发展,都具有重要的意义。过去,由于垦区玉米机械化程度低,用工多,限制了玉米生产的发展。近年来,许 Corn is one of the main food crops in Heilongjiang reclamation area. For more than a decade, the area planted with corn in this reclamation area has been steadily expanding and output has been steadily rising. According to the natural zoning, variety and planting of corn, it is of great significance to increase yield per unit area, increase labor productivity and commodity rate, and promote the development of animal husbandry. In the past, due to the low degree of mechanization of corn in reclamation area, more labor was used, limiting the development of corn production. In recent years, Xu