１９９４～１９９５年在沈阳农业大学校内试验地研究了紧凑型和平展型两个类型玉米品种的生长发育规律。不同密度、肥力条件下，叶面积指数和光能利用率呈显著正相关，干物质积累前期不同密度差异较大，后期干物质积累有相互接近的趋势。紧凑型玉米增产原因是光合势大、光能利用率高、穗数每公顷增加９３３５穗、穗粒数增加１７４８％、但百粒重减少１１４０％。 From 1994 to 1995, the law of growth and development of two types of maize varieties, compact and flattened, was studied experimentally in Shenyang Agricultural University. Under different density and fertility conditions, there was a significant positive correlation between leaf area index and light energy utilization rate, different density at the early stage of dry matter accumulation, and dry matter accumulation at the later stage approached each other. The reason for the yield increase of compact maize is that the photosynthetic potential is high and the light energy utilization rate is high. The number of ears per pantry increases 9335 spikes, the number of grains per spike increases by 17.48%, but the weight loss by 100% by 11.4%.