我省地处高纬度,气候冷凉无霜期短,玉米常受低温早霜的危害。近十年来,我省玉米常受延迟型冷害,由于生育期的推后,遭受早霜危害而减产,粮食总产量波动很大,所以开展了玉米种子低温发芽性和幼苗耐低温性的研究。 My province is located in high latitudes, cold weather frost-free period is short, corn is often affected by the cold frost damage. In recent ten years, corn in our province is often delayed chilling injury, due to the postponement of the growth period, suffering from early frost damage and reduced production, the great fluctuations in the total grain output, so the corn seed germination and seedling low temperature resistance were studied.