玉米、高粱种子的低温冻害,是我国北方地区种子工作中的一个严重问题。每遇低温年份,就有数百万乃至数千万斤种子因冻害而遭受损失,不得不调进大量的种子,或者是以粮代种、以料代种,严重地影响了粮食产量的增长。为了防止低温冻害种子,广大农民群众 Low-temperature frost damage of maize and sorghum seeds is a serious problem in the work of seeds in northern China. Whenever there are cold years, millions or even tens of millions of kilos of seeds suffer losses from frost damage, and large amounts of seeds have to be transferred or replaced by grain or by seed, seriously affecting the growth of grain output . In order to prevent cold frost damage seeds, the majority of peasant masses