Mustard planting: how to fertilize mustard for stem?

How to fertilize the stem with mustard? Is there anything you need to pay attention to? Ask experienced netizens to introduce the method of stem mustard (mustard) is a good crop for agricultural production in winter, but in production, it is found that once farmers transplant, do not pay attention to late topdressing, it will lead to low yield. Generally speaking, it takes 5.4kg of nitrogen, 1.4kg of phosphorus and 5.6kg of potassium to produce 1000 kg fresh stem tumor. In order to produce 3000 grams of fresh stem tumor, it is necessary to absorb 16.2kg of nitrogen, 4.2kg of phosphorus and 16.8kg of potassium. The requirement ratio of nitrogen, phosphorus and potassium is 1 ∶ 0.26 ∶ 1.04. The period of exuberant absorption of nitrogen by stem mustard was at the stage of 13-18 leaves. In the whole growth period, the maximum absorption of phosphorus was in the 14-18 leaf stage, and the exuberant absorption of potassium was in the 13-19 leaf stage. The law of nitrogen, phosphorus and potassium uptake by stem tumor mustard varies greatly in different producing areas due to different climatic conditions and growing seasons. Fertilization of stem tumor mustard can be divided into base fertilizer and topdressing fertilizer. Base fertilizer is generally applied with rotten organic fertilizer 2000kg to 3000 kg per mu or 45% compound fertilizer to 60 kg. After spreading, ploughing and raking into the soil, and then doing border transplanting. Topdressing mustard should be topdressing according to different cultivation conditions and stem and leaf growth characteristics. Give priority to nitrogen fertilizer, generally applying 25 kilograms of nitrogen per mu. It was applied in three times. For the first time, after transplanting, the plant entered the 8-leaf stage (before December 15), when the temperature was higher. Leaf growth rate is fast, only timely topdressing can form the first leaf ring, laying the foundation for stem expansion, generally 15001750kg of manure per mu, or 4kg of urea, 1000 kg of water. The second topdressing was carried out in the 13-leaf stage (from mid-January to early February), when the growth rate of stems and leaves was very fast, generally with ammonium bicarbonate 25 kg, calcium superphosphate 20 kg, potassium chloride 5 kg plus water 1500 kg per mu. The third topdressing was carried out in the 15-leaf stage (late February). 25 kg urea plus 12.5 kg potassium chloride plus water per mu was applied, and nitrogen fertilizer was not applied alone or alone. After 7 days, the fertilizer was applied again according to the growth situation. Stop topdressing one month before harvest in case the growth is too fast and hollow. Click to get more mustard planting techniques click to get more vegetable planting techniques