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1.控氮法:苗期适当减少氮肥用量,切不可偏施氮肥。追肥要早,以促使菜苗健壮。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.施有机肥法:用猪牛粪或土杂肥等暖性农家肥,培在菜根茎处,可提高根部土温。施肥宜趁晴天进行,每亩用量1000～1500公斤。3.培土法:冻前结合中耕,用碎土培土壅根,可使
1. Nitrogen Control Law: Seedling appropriate to reduce the amount of nitrogen, must not bias nitrogen fertilizer. Top dressing to be early, to promote robust seedlings. Cryogenic, can not be applied quick-acting nitrogen fertilizer, should be topdressing a phosphate fertilizer to enhance the cold resistance. 2. Application of organic fertilizer method: with pig manure or Tuza Fei and other warm manure, cultivate in the root of vegetables, can increase the root temperature. Fertilizers should take advantage of sunny days, the amount of 1000 to 1500 kg per acre. 3. Cultivation method: combined with cold before cultivating, with soil crushed soil 壅 root can be