油菜越冬期间,由于低温影响,造成叶片干枯,部分生长点死亡。据统计,我县每年因冻害造成的损失约占总产的15—20%,对油菜生产影响很大。试验证明,采用冬锄,施蒙头粪和巧用沙与覆盖等措施对防冻保苗都有良好的效果。其中以宽行种植,冬施蒙头粪的防冻效果最为显著。它可以防止寒流对油菜根头的直接侵袭。有效地减轻冷害,促使年后的油菜稳健生长。在多雪年份,可防止根部 During the winter rape, due to the impact of low temperature, causing the leaves to dry, part of the growth point of death. According to statistics, the annual loss due to frost damage in our county accounts for about 15-20% of the total output, affecting rapeseed production greatly. Test proved that the use of winter hoe, Shi Meng head dung and clever use of sand and cover measures such as the antifreeze seedlings have good results. Among them, the wide-line planting, winter Shi Mengtou the most significant antifreeze effect. It prevents direct cold rains from penetrating the roots of rapeseed. Effectively reduce the chilling injury, prompting the steady growth of rape in later years. In snowy years, prevent the roots