Soil selection is suitable for fertile sandy loam soil, light clay loam soil, etc. The sandy loam soil has poor fertilizer retention and water retention, which is not conducive to the development of Chinese cabbage leaf ball. Heavy clay susceptibility to soft rot, it is not appropriate to plant cabbage. Cabbage should be carried out for 3-4 years of rotation, and it can be used to select the mouths of melons, solanes, onions and garlic, beans, and wheat crops. It cannot be planted with cruciferous vegetables such as cabbage and radish. The main varieties planted for selection of good varieties include Beijing No. 3, Yutian Erbaojian and Tianjin Qing. After the fine soil preparation is finished, the sick plants are transported to the deep field and deeply ploughed 16-25 centimeters. After each acre, the cultivating and cultivating leveling is done. The width is 1-1.5 meters and the length is 8-10 times. Meter. Or ridging, ridge height 8-10 cm, ridge back width 70 cm, ridge distance 20 cm. The use of half-high ridge cultivation can improve the permeability of the soil, reduce the disease, promote the growth of Chinese cabbage roots, and is conducive to drought resistance.
Chemical weeding seedlings before the emergence of acres with 72% Dole 100 ml water 30 kg spray ridge surface to prevent weeds.
Plant two rows of ridges in each densely planted plant. After the emergence of Chinese cabbage, 4-5 true leaves can be established. Plant spacing 35-38 cm, 3900-4000 acres left.
After fertilizing and seedlings are seeded and seedlings are planted, the method of flooding with small water is used to treat 3-4 kg of urea per acre. Cabbage period of Chinese cabbage should ensure adequate supply of fertilizer and water, and use potassium dihydrogen phosphate and urea 6-8 kilograms per acre and apply it with watering. At the beginning of the ball, the quick-acting nitrogen fertilizer was the main, and the urea of ​​15 mu was used to promote the fast balling of Chinese cabbage.
Pest control The major diseases of autumn cabbage include fungal diseases such as downy mildew and black spot. Early onset of spraying 25% metalaxyl wettable powder 800 times, green hen No. 1 WP 600 times or 70% thiophanate powder 800 times, 40-50 kg per acre, 5-7 days Prevention once, spray 3-4 times. For the main bacterial diseases such as soft rot, can be used per acre with green hen No. 6 wettable powder 40 grams of water 30-40 kg spray, 5-7 days once, even spray 3-4 times. For the main pests of Chinese cabbage such as aphids, cabbage caterpillars, and diamondback moth, phytoplankton pesticides can be used for the prevention and control of eucalyptus, imidacloprid, 2.5% vegetables, 5% cilostazol, and LS. For older larvae, 20% rice bran and 1.8% avermectin can be used for control. Special attention should be paid to the prevention and control of pests before ball-breaking, otherwise it would be difficult to control them after balling.
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