玉米是喜温作物,玉米生育期间温度的高低对玉米有深刻的影响。去年我省气温从播种到收获一直较正常年份低,致使玉米生育期延迟。制种田的抽丝期较正常年份晚5～7天,如遇早霜,种子成熟度不够,降水困难。如果种子水分过多,在低温条件下,会使细胞间隙的水分因受冻而结冰,形成冰晶 Corn is a thermophilic crop, and corn has a profound impact on the temperature during its growth. Last year, the temperature in our province from sowing to harvest has been lower than normal, resulting in delayed corn growth period. Sowing silkworm farming than normal later than 5 to 7 days, in case of early frost, seed maturity is not enough, precipitation is difficult. If the seeds of water too much, under low temperature conditions, the intercellular space will make the moisture frozen due to freezing, the formation of ice crystals