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白菜类蔬菜较高的土壤含水量、肥沃的土壤和全生育期供应充足的氮肥,是大白菜丰产的关键。后期磷、钾肥要充足,适时适量施用微量元素是必要的。以吨产品计算,对氮、磷、钾的吸收量为氮0.8～2.6千克、五氧化二磷0.8～1.2千克、氧化钾3.2～3.7千克,其吸收比例为1∶0.5∶1.7。对微量元素的要求,以铁为主,钙、锌、硼、锰次之,铜最少。叶面喷施0.25%～0.5%的硝酸钙溶液,可明显降低大白菜因缺钙而引起的干烧心发病率。
Cabbage vegetables, high soil moisture, fertile soil and adequate supply of nitrogen during the whole growth period, is the key to cabbage yield. Late phosphorus, potassium fertilizer should be adequate, timely and appropriate use of trace elements is necessary. In terms of tons of products, nitrogen, phosphorus and potassium absorption of nitrogen 0.8 to 2.6 kg, phosphorus pentoxide 0.8 to 1.2 kg, potassium 3.2 to 3.7 kg, the absorption ratio of 1: 0.5: 1.7. The requirements of trace elements, mainly iron, calcium, zinc, boron, followed by manganese, copper at least. Foliar application of 0.25% to 0.5% calcium nitrate solution can significantly reduce the Chinese cabbage due to calcium deficiency caused by the incidence of heartburn.