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我们生产上推广的玉米杂交种,多属高大,叶片较宽而平展或稍上冲的单秆大穗类型。多数杂交种在良好的水肥条件下,种植密度在3000～4000株/亩左右,最大叶面积系数仅达到3.5～4。农业生产的迅速发展,迫切要求提供增产潜力更大的玉米杂交种,以突破目前推广种的产量水平,使粮食生产跃上新台阶。紧凑型玉米上部叶片直立,叶片和茎秆的夹角小,果穗以下叶片稍平展,中矮秆,这种株型通风透光性良好,适宜进行高密度的栽培,每亩株数可达到5000～5500株,实现了叶面积系数的突破(5.5～6),能更充分有效地利用光能,并且在密植时仍有较高的单株生产力,从而达到大幅度增
Our production of corn hybrids on the promotion, mostly tall, wide and flat leaves or a little overshoot of single large spike type. Under the condition of good water and fertilizer, the majority of hybrids have a planting density of about 3000-4000 plants / mu and a maximum leaf area coefficient of 3.5-4. With the rapid development of agricultural production, it is urgent to provide corn hybrids with more potential to increase production so as to break through the current output level of popularized species and bring the grain production to a new level. Compact corn upper leaves upright, the angle between the leaves and stems small, spike leaves below a little flat, medium dwarf, this type of plant well ventilated and translucent, suitable for high-density cultivation, the number of strains per acre up to 5000 ~ 5500 plants, a breakthrough in leaf area coefficient (5.5-6) was achieved, the light energy could be utilized more fully and effectively, and there was still a high single plant productivity in close planting, thus achieving a significant increase