对沈阳市１９８７～１９９６年气候资料和玉米平均单产水平分析显示：４～９月降水量是影响玉米产量的主要因素，其中７～８月降水量影响最大；光热条件基本满足玉米生长发育需求，但短时段光热条件对玉米产量有一定影响；旱、涝灾为玉米主要农业气象灾害，风灾、雹灾对产量有一定影响，但仅限于局部地区。 From 1987 to 1996, the climatic data and the average yield of maize showed that the precipitation from April to September was the main factor affecting the corn yield, of which the precipitation was most affected from July to August. The light and heat conditions basically met the demand of corn growth and development , But the light and heat conditions in a short period of time had a certain impact on the yield of maize; drought and flood were the major agricultural meteorological disasters in maize. Windstorm and hail disaster had some impact on the yield, but only in some areas.