2, sowing; There are two kinds of mustard seed sowing, one is direct seeding, three seeds are sown in each hole, and then one plant is planted between seedlings after emergence. The other is seedling raising and transplanting. Usually, most farmers choose seedling raising first and then transplanting and planting, which can save a lot of seeds. The amount of seeds used per mu is 50 grams, which requires 30 square meters of nursery land. It is best to choose matrix soil or fire ash soil for nursery, and there is no need for fertilization at seedling stage. When the soil is dry and watered, the seedlings can be transplanted after 20~25 days.
3. Base selection; If mustard is suitable for neutral soil, we should choose loose and ventilated soil for irrigation and drainage, dig the soil in sunny days after harvesting crops, and kill the original bacteria contained in the soil by sunlight. A few days before planting, apply sufficient base fertilizer, and apply 3000 kg of decomposed organic fertilizer per mu. At the same time, properly add nitrogen, phosphorus and potassium compound fertilizer and mix them together, with 50 kg per mu, mix them with soil, level and finely divide them, and then make them into plots with a width of 1.2 m.
4. Reasonable close planting; 1.2 Three trees are planted in a wide plot, with a spacing of 40 rows and a spacing of 50 cm, and more than 4,000 trees are planted per mu. When transplanting seedlings, we should transplant seedlings with soil, handle them gently, and water the roots after planting. After warming the seedlings, we should use 5 kg of urea and water to water each mu to improve the survival rate of mustard and speed up the development of green.
5. Field management; The field management of Brassica juncea is mainly water and fertilizer management. Under the condition of applying sole fertilizer, the mustard juncea is topdressing for 2-3 times during the whole growth period, and the first topdressing is to develop a strong seedling fertilizer. 30 kg urea and potassium chloride 10 kg water are used together for irrigation. For the second time, the cabbage mustard entered the continuous cropping period "cabbage cropping period", and each acre was watered with 30 kg of ammonium bicarbonate and 30 kg of calcium superphosphate. During this period, the soil was kept moist, and topdressing was generally combined with intertillage weeding.
6. Prevent pests and diseases; The prevention of cabbage diseases and insect pests should start from the warm seedlings, so that it is ventilated and transparent, and there can be no water accumulation on the ground. If these points are managed, few diseases and insect pests will occur. Of course, drugs can also be used to prevent diseases and pests of cabbage, such as virus disease, soft rot, aphid, cabbage worm, diamondback moth and so on. Streptomycin or carbendazim can be used to prevent diseases, and imidacloprid can be used to spray pests once every other week for 2-3 times.