Chinese Cabbage Cultivation Techniques for High Yield in Spring

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Cabbage is widely cultivated in China, but spring cultivation is very prone to convulsions, summer rot, disease, heavy pests and other issues. Now introduce cultivation techniques are as follows: 1, determine the suitable seedling age Chinese cabbage leaf ball generally consists of 35-70 leaves. The differentiation of these leaf primordia was completed approximately when 8 true leaves were unfolded. The development of eight true leaves takes about one month in spring. If the nursery period is too long, the survival rate will be reduced if planted in the ground; if there is insufficient leaf transplant, it will affect the differentiation of leaf buds, resulting in the premature formation of flower buds and convulsions. In 30 samples, the number of leaves in the "spring and summer king" variety was 48-59 leaves. In this way, the survival rate caused by the long seeding period is avoided, and the number of leaves with sufficient leaf differentiation is also avoided. 2. Intensifying the management of fields in the spring The field management of Chinese cabbage is different from the cultivation in the autumn. The whole process emphasizes a word of “protection”. 3.1 Seedling Bed Bed and Ground Service emphasizes "fat", "warm", "fine" and "loose". Using 2/3 non-cruciferous garden land, 1/3 rotted manure, plus 0.2% diammonium nutrient soil formula, through the screening bed, to lay a good foundation for the cultivation of strong seedlings. 3.2 All mulching techniques are used when planting. Each year, 4000 kg of fertilizer is applied to Shinong, 15 kg of diammonium, and the spacing between rows is 0.50.4 meters. 3.3 After planting water, wait until the ground sees wet. No seedlings are raised throughout the growth process. Keep the field see wet see dry. One month after colonization, the urea was chased 1 to 10 kg per mu. 3. Disease and Insect Pest Control The soft rot of the experiment was only mildly observed in the first phase (planting on April 8 and colonizing on May 10). There was almost no such phenomenon in the second and third phases. Agricultural streptomycin 150 mg/kg spray control. The incidence of downy mildew presents a light weight trend. Use mancozeb 600-800 times or kill 400 times spray control.