大棚蔬菜苗期沤根是一种生理性病害,大多由于管理不当引起。初发时根部出现锈斑,严重时根部腐烂,不长新根,幼苗变黄萎蔫,后期全部死亡。保持适当温度床土配制要合理,播后至苗期应保证足够的土温。如遇阴雨天,光照不足时,应采取增温保温措施。早春育苗最好在棚(室)内采用电热温床进行育苗,以利于保温。及时降低湿度在大棚或温室等保护地育苗时,一般苗床不明显干旱(表土手握不散团)时不浇水,应尽量少浇水或不浇 Greenhouse vegetables seedling stage root is a physiological disease, mostly due to improper management. Root rust occurs when the first attack, severe root rot, not a new root, yellowing wilt seedlings, the late deaths. To maintain the appropriate temperature bed preparation to be reasonable, sowing seedlings to ensure adequate temperature. In case of overcast and rainy days, when the light is insufficient, we should take measures to increase the temperature and keep warm. Breeding nursery early in the best shed (room) using hotbed hot nursery, in order to facilitate insulation. Promptly reduce the humidity in the greenhouse or greenhouses and other protective nursery seedlings, the general seedbed is not obvious drought (top soil hand does not leave the group) when not watering, watering should be as little as possible or not