The vegetable heart can be cultivated all year round. It is of great significance for the annual production and supply of vegetables. Before nursery, the nursery beds should be finished, and 1.2 to 1.5 meters wide flat rakes should be made. Apply enough organic fertilizer. Before sowing, water is poured and sowing is spread. As the seeds of Chinese cabbage are small, seed dressing can be used to repel insect pests in the ground and segregate virus infection without affecting the function of germination and ingestion, enhancing the respiratory intensity, and increasing the seed germination rate. After sowing, cover a thin layer of fine soil. In the spring, nursery must master the temperature, and the seedling germination and seedling growth of Brassica chinensis is suitable for 25°C-30°C. If the room temperature is too low, the seedlings will pass vernalization earlier, and the plants will fail to bloom before they grow into flowers. Seedlings need to be seedlings 1 to 2 times after the true leaves are unfolded. The seedling distance is about 5 cm. When the seedling grows 4 to 5 true leaves, it must be planted in time. The seedling age is 20 to 25 days, and even late-maturing varieties should not exceed 30 days. Summer and autumn seasons are suitable for live broadcasting. The amount of seed used for direct seeding is 250-300 g. The organic fertilizer must be applied in the planting area, and the irrigation and drainage are convenient. The photosynthetic nutrient film fertilizer is needed during the seedling stage to increase the photosynthetic production nutrients and the chlorophyll can effectively increase the absorption of the fertilizer effect.
After planting, the cabbage should be topdressed appropriately, topdressing with quick-acting nitrogen fertilizer, topdressing 2 times every 5 to 7 days, topdressing 5 to 10 kg of urea per acre, watering immediately after topdressing, and raising the cells with plant e-fertilizer. Splitting, molecular synthesis, and nutrient-matching digestion levels accelerate the frequency of metabolism and activate the plant nutrient-passing system to produce a superior fertilizer effect. In addition, depending on the seedling situation, the vegetable shrivel should be properly applied when it is weak or yellow, and the fertilizer should be fertilized and watered in a timely manner after multiple harvests. The main diseases of Chinese cabbage are downy mildew, soft rot and viral diseases. The main prevention and control methods can remove the diseased roots at the onset of disease, and use the general tree guard to disinfect and spray the plant cell immune factors to enhance the plant's stress resistance, which can cause the viral DNA to cleave and apoptotic. Strong immune function, induces interferon and active interleukin, inhibits residual virus replication, and promotes positive energy ecological growth of plants. Based on the resistance mechanism of host plants and the principle of using the toxicity of pathogenic bacteria, the plant physiological diseases and invasive diseases were controlled to multiply.
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