Autumn Chinese Cabbage Planting Technology
The choice of soil is fertile sandy loam, light clay loam and so on. 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 3-4 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.
The main varieties to be planted are Beijing No.3, Yutian Erbaojian and Tianjin Qing.
After the fine soil preparation is completed, the sick plants are transported to the field for deep burial, and the deep ploughing is 16-25 cm. After ploughing and ploughing, the scorpion is smashed, the scorpion is 1-1.5 m wide and the scorpion is 8-10 m long. Or ridges, 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.
Chemical weeding and sowing before the emergence of seedlings with 72% Duer 100 ml plus water 30 kg spray ridge surface to prevent weeds.
Reasonably close planting two rows of each ridge, and 4-5 pieces of true leaves after the emergence of Chinese cabbage can fix the seedlings. The plant spacing is 35-38 cm, and the seedlings are 3900-4000.
After the fertilizer and water management plan, the method of using large water and small fertilizer is adopted according to the situation of phlegm and water, and 3-4 kg of urea per acre is applied to the water. During the lotus period of Chinese cabbage, sufficient supply of fertilizer water should be ensured, and each pot of potassium dihydrogen phosphate and urea should be 6-8 kg per acre, and it should be applied with watering. When starting the ball, the quick-acting nitrogen fertilizer is the main one, and the urea is 15 kg per mu to promote the fast balling of Chinese cabbage.
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 3-4 times. For the main bacterial diseases such as soft rot, 40 kg of water can be sprayed with 40 g of chlorogenic powder No. 6 per acre, spray once every 5-7 days, and spray 3-4 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.
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