1. Variety selection

Should choose strong disease resistance, good quality, high yield varieties, such as spring and autumn 54, spring and summer king, Longchang white, Lu Bai 7 and other varieties.

2. Site preparation and fertilization

Cabbage fields require rotations of more than 3 years with corn and no continuous cropping with cruciferous crops. Generally leave the stubble field, and then re-ridge again in the middle of June to turn the weeds into the soil, with a ridge height of 15-18cm and a ridge width of 70cm. Then apply 75-90t of rotten organic fertilizer per hectare without using chemical fertilizer. Apply fertilizer in the ditch, and then break the ridge table with plow to bury the fertilizer into the ridge, and then suppress it once again, so that the ridge table soil is compacted, and the planting state is reached.

3. Seed treatment and sowing

Seeds are treated with warm soup soaking method. The seeds are first soaked in cold water, and then kept in 55 ° C water for 15 minutes. They are immediately removed to cool in cold water, and sown after drying. The amount is 0.2% -0.3% for seed dressing. Sowing on July 18-25, the seeding amount per hectare is 3kg, and the number of seedlings per hectare is 38,000-42,000.

4. Field management

After the emergence of Chinese cabbage, the seedlings are usually circulated at the time of 2 true leaves, and 4-5 plants are left in each hole; the second time of 4-5 true leaves, 2-3 plants are left in each hole; 6-8 true leaves When the seedlings. Shovel in time to shovel in time, usually 6-7d after the emergence of cabbage or shovel head after ground, when the seedlings are small, shallow root system, shallow shovel 3-4cm, mainly to remove small grass; shovel before and after the second All over the ground, mainly loose soil, deep shovel 8-10cm; shovel the ground for 3 times before the ridge of Chinese cabbage, shovel the soil cultivated on the ridge table, in order to expand the rosette leaves to prevent the plants standing upright to cause soft water Rot occurs. If there is de-fertilization in the rosette stage and the nodule stage, spray 7.5kg of potassium dihydrogen phosphate solution and 7.5kg of urea solution per hectare. In areas with irrigation conditions, irrigation can be carried out in combination with topdressing during the rosette stage and the nodule stage, but sewage irrigation is strictly prohibited to prevent soil pollution.

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