How to apply fertilizer to Chinese cabbage

Chinese cabbage can be direct seeding can also be transplanted seedlings, the general implementation of direct seeding cultivation. If seedlings are transplanted, seedbed fertilization is very important for cultivating strong seedlings. The standard of seedbed fertilization is generally to plant one mu of field required seedbed (about 35 square meters) to apply fully decomposed manure 200-250 kg or ammonium sulfate 1- 1.5 kg, calcium superphosphate or potassium sulfate 0.5 -1 kg, these fertilizers and bed soil fully mixed into the depth of 15 cm. First, base fertilizer base fertilizer to organic fertilizer, including pig manure, manure, human manure, compost, pond mud and so on. The amount of base fertilizer is generally 5000 kg manure per mu, or 4000 kg manure plus 100 kg cake fertilizer. Fertilization method to spread and furrow application combined with the better, that is, before ploughing 3000 kg manure evenly spread on the surface, and then shallow to make manure mixed evenly, and then in the flat before ridging, according to the predetermined row spacing trenching, 2000 kg manure or 1000 kg manure plus 100 kg cake fertilizer mixed in the ditch, ridging ready for planting. Second, topdressing and seedling fertilizer: When the seedlings grow a true leaf, topdressing 5-7 kg of ammonium sulfate (or other nitrogen fertilizer equivalent to nitrogen content) per mu is applied on both sides of the seedling strip 8-10 cm away, and the seedlings are watered with small water. Seed fertilizer can also be applied to the furrow before sowing. Fertilization: after Chinese cabbage seedlings are fixed and watered, a shallow ditch with a depth of 8-10 cm is opened at the position 18-20 cm away from the root of the plant in the middle of the ridge, decomposed organic fertilizer is applied into the ditch according to 1200-1500 kg per mu, and then the ditch is buried and sealed. If the organic fertilizer is insufficient, 500-1000 kg of human excrement can be applied per mu, and 10-15 kg of ammonium phosphate, 8-10 kg of potassium sulfate and 10-20 kg of calcium superphosphate can be added. In the balling stage, topdressing can be applied for 3 times, and chemical fertilizer can be applied again at the initial stage of balling, and ammonium sulfate is applied 15- 20kg per mu; after one week, topdressing is carried out for the second time, and ammonium sulfate is applied 10- 12kg per mu or decomposed human excrement is 1000- 1500kg; at the end of the balling stage, if the temperature is not lower than 12℃, fertilizer can be applied again, and ammonium sulfate is applied 10kg per mu. If organic fertilizer and chemical fertilizer are applied alternately, the effect will be better.