How to apply fertilizer skillfully during the growth period of Chinese cabbage.

How to apply fertilizer skillfully during the growth period of Chinese cabbage. Chinese cabbage is the most common vegetable in our life, with many varieties, good quality, good taste, rich nutrition and low price. The planting area and yield rank first among vegetables. In recent years, with the continuous improvement of production level, it has been supplied all the year round. However, as Chinese cabbage in spring, if fertilization management measures are not appropriate in each growth period, it will cause problems such as low yield and poor quality. Here, Xiang Xiang talks about her personal views on how to fertilize spring Chinese cabbage in different growth periods for vegetable farmers' reference. Chinese cabbage is a kind of crop with high fertilizer demand and is most sensitive to nitrogen demand. Insufficient nitrogen supply will affect its growth. Adequate nitrogen can promote chlorophyll formation and bulb growth, increase the number and area of leaves and increase their yield. Too much nitrogen will lead to too fast growth, make leaves thinner, increase water content and decrease quality. The demand for phosphorus in Chinese cabbage is not great. Adequate phosphorus can promote the growth of roots and the differentiation of Ye Yuan, the growth of outer leaves and the differentiation of bulbous leaves. Chinese cabbage has a great demand for potassium. Potassium can promote the differentiation and growth of leaf bulbs, enrich the core, increase the nutrients in leaves and improve the quality of Chinese cabbage.

Let me share some fertilization tips. 1, apply sole fertilizer. First, apply sufficient manure, generally not less than 5,000 kg of manure per mu, spread 60% of manure evenly in the ground and dig deep into the soil, then spread the remaining 40% of manure on the ground before ploughing, and then ridging. When manure is applied, it can be applied in strips, and calcium superphosphate or formula fertilizer can be applied together, with the dosage of 50-70 kg per mu. 2. Fertilize seedlings. In order to ensure sufficient nutrients at seedling stage, quick-acting fertilizer should be used as "seedling-raising fertilizer". Before direct seeding, 5-8kg of ammonium sulfate can be used per mu, or10kg of Chinese cabbage can be applied into sowing holes and ditches, then mixed with soil evenly, and then watered for sowing. 3. Pay attention to fat. Generally, 800- 1500 kg of human excrement and urine, 50- 100 kg of plant ash, 0-/0-15 kg of ammonium nitrate and 7- 10 kg of phosphorus and potassium fertilizer are applied per mu. For direct seeding, 8- 10 cm ditch should be opened at the edge of the plant, and then fertilizer should be applied to cover fine soil.

Transplanting Chinese cabbage should be ditched first, then fertilized and mixed with soil before transplanting seedlings. If the Chinese cabbage grows white in the late rosette stage, the measures of "squatting seedlings" must be taken. 4. Re-apply ball fertilizer. It is best to apply pellet fertilizer 5-6 days before wrapping, and it is best to choose a fertilizer with long-lasting fertilizer effect, especially to apply more potassium fertilizer. Chinese cabbage 15-20 kg can be applied per mu, and it is best to apply it after mixing chemical fertilizer with decomposed manure. 5. Spray foliar fertilizer. Chinese cabbage is sensitive to calcium, if calcium deficiency will cause heartburn, so spraying 0.3% calcium chloride solution or 0.25-0.5% calcium nitrate solution can effectively reduce the incidence. At the same time, combined with pest control, 0.5- 1.0% urea or 0.2% potassium dihydrogen phosphate solution can be sprayed at the initial stage of pelletizing. The above is my answer, I hope it will help you.