蔬菜防寒十法１．控氮法。苗期适当减少氮肥用量，切不可偏施氮肥，以免植株抗寒力差。追肥要早，以促使菜苗老健．低温之前不能施用速效氮肥，宜追施一次磷钾肥，以增强抗寒力。２．施肥法。用猪牛粪或土杂肥等暖性农家肥，围培在菜棵根颈处，可提高根部土温２～３℃。施... Ten vegetables cold method 1. Nitrogen control method. Appropriate to reduce the amount of nitrogen seedling stage, must not bias nitrogen fertilizer, so as to avoid poor cold hardiness. Top dressing to be early, in order to promote vegetable seedling health. Can not be used before low-temperature nitrogen fertilizer, phosphorus should be topdressing a potash, in order to enhance the cold hardiness. 2. Fertilization method. With pig manure or Tuza Fei and other warm manure, permaculture in the root of the neck, can increase the root soil temperature 2 ~ 3 ℃. Shi ...