为进一步提高黄淮海地区夏玉米的粒重和产量，通过设计不同的播种时期和种植密度，研究了不同处理造成的温光生态条件和群体结构差异对玉米籽粒灌浆的影响。结果表明：播期和种植密度对于玉米中部籽粒灌浆速率影响主要表现于灌浆后期，密度影响较大；播期和种植密度对于玉米顶部籽粒灌浆速率主要是阶段性影响；播期对于玉米中部籽粒含水率影响较大，种植密度对于玉米中部籽粒含水率没有影响。
英文摘要:
In order to raise summer maize kernels weight and yield in the Huanghuaihai Plain, design different sowing date and planting density in the experiment.The research is about the effects of temperature and sunshine ecological condition and plant group structure on maize filling. The results indicated that the effects of sowing date and planting density on middle grain filling rate are in filling later stage.The effects of planting density are larger; The effects of sowing date and planting density on top grain filling rate are mainly in different stage;The effects of sowing date on middle grain water content are larger. The effects of planting density on middle grain water content are insignificant.
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