在吉林省东部的低温冷凉区，通过logistic方程比较覆膜和不覆膜玉米籽粒灌浆过程，探讨不同种植方式对玉米的籽粒灌浆和产量的影响。结果表明：通过覆膜，可有效提高地温，促进玉米的生育进程，提高玉米灌浆速率, 延长灌浆持续时间,显著增加玉米的百粒重和产量。三个品种覆膜最高产量可达12483.52 kg/hm2，比裸地种植平均增产92%。玉米的百粒重和产量与灌浆速率达到最大时的玉米生长量（Wmax）、平均灌浆速率（Rmean）之间存在着显著的正相关关系。
英文摘要:
To investigate the effects of different cultivation methods on grain filling rate and yield of maize, the logistic equation was used to compare the grain filling process of film covered and non- film covered maize kernels in the low temperature cold zone of eastern Jilin Province. The results showed that film covered planting technology effectively improved the temperature of grain filling stages, promoted the growth process of maize and increased the grain filling rate. Additionally, the duration of grain filling were prolonged and the hundred-grain weight and yield were significantly increased, reaching the highest yield of 12483.52 kg/hm2, which is 50% higher than non-film covered. Under maximum grain filling rate, hundred grain weight and maize yield positively correlated with Wmax and Rmean.
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