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１９９６－１９９７年的超高产夏玉米栽培试验研究表明，超高产夏玉米的最大叶面积指数可达５７左右，叶片的功能期长，叶面积４０以上的时间在６０ｄ以上，总光合势大，净同化率高。营养器官干物质积累的高峰期在吐丝后３０ｄ前后，吐丝前后的干物质积累比例约为４∶６，经济系数在４４％左右。研究还发现，黄淮海地区玉米生长季节的天气条件尤其是日照时间是影响玉米产量的重要因素。
The experiment of super high yield summer maize from 1996 to 1997 showed that the maximum leaf area index of super high yield summer maize was up to 57, the long period of leaf function and leaf area over 4 0 were above 60 days, Great potential, high net assimilation rate. The peak of dry matter accumulation of vegetative organs was around 4: 6 before and after 30 days after silking, and the economic coefficient was around 44%. The study also found that the Huang-Huai-Hai region during the maize growing weather conditions, especially the sunshine time is an important factor affecting the yield of corn.