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2. Soil preparation and fertilization. After the sputum is collected, the sick plants are transported to the field for deep burial, and the ploughing is 16 to 25 cm, and the high-quality decomposed organic fertilizer is 4000-5000 kg per mu, 25 kg of diammonium phosphate and 20 kg of potassium chloride. Dr. Mu Shishi's first generation of 1.5 kilograms of net into the soil to prevent the roots of adult worms to lay eggs. After ploughing and ploughing, do 畦, 畦 1 to 1.5 meters wide and 8 to 10 meters long. Or ridge, ridge height 8 ~ 10 cm, ridge back width 70 cm, ridge distance 20 cm. The use of semi-high ridge cultivation can improve the permeability of the soil layer, reduce the disease, promote the growth of Chinese cabbage roots, and is beneficial to drought and drainage.
3. Chemical weeding. Before planting the seedlings, use 72% Duer 100 ml and water 30 kg spray ridges to prevent weeds.
4. Reasonable close planting. Two rows of each ridge are planted, and 4 to 5 true leaves of Chinese cabbage can be seeded after emergence. The plant spacing is 35-38 cm, and the seedlings are 3900-4000.
5. Fertilizer operation. After the seedlings are fixed, the method of using large water and small fertilizers is adopted, and 3 to 4 kg of urea per acre is applied to the water. The cabbage culture period should ensure sufficient supply of fertilizer and water. Each acre is diluted with 6 to 8 kg of potassium dihydrogen phosphate and urea, and is applied with watering. When the ball is started, it is mainly based on quick-acting nitrogen fertilizer, and 15 kg of urea is used in the mu to promote the rapid formation of Chinese cabbage.
6. Pest control. The main diseases of autumn cabbage are fungal diseases such as downy mildew and black spot. At the beginning of the disease, spray 25% metalaxyl WP 800 times liquid, Luheng 1 WP 600 times liquid or 70% methyl thiophanate powder 800 times liquid, 40-50 kg per acre, 5-7 days Control once, even spray 3 to 4 times. For the main bacterial diseases such as soft rot, 40 kg of chlorogenic powder can be sprayed with 40 to 40 kg of water per acre, 5 to 7 times per day, and sprayed 3 to 4 times. For the main pests of Chinese cabbage such as aphids, cabbage caterpillars and diamondback moths, it is advisable to use pollution-free pesticides such as chlorpyrifos, imidacloprid, 2.5% xixi, 5% taibao and lesben. For the older larvae, 20% rice bran and 1.8% avermectin can be used for prevention and treatment. Special attention should be paid to the prevention and control of pests and diseases before the ball is formed, otherwise it will be difficult to prevent and control after the ball is formed.
1. Soil quality selection. It is suitable for fertile sandy loam soil and light clay loam. The sandy loam soil has poor fertilizer and water retention, which is not conducive to the development of Chinese cabbage leaf. If the soil is susceptible to soft rot, it is not advisable to grow Chinese cabbage. Chinese cabbage should be rotated for 3 to 4 years. It can be selected from melons, solanaceous fruits, onion and garlic, beans and wheat crops. It cannot be planted with cruciferous vegetables such as cabbage and radish.
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