Cabbage is widely cultivated in China, but spring cultivation is very prone to convulsions, summer rot, disease, heavy pests and other issues. In response to these problems, based on summing up the experiences of others, the author introduces the cultivation techniques as follows:
1, select the appropriate variety and sowing date selection of South Korea "Spring and Summer King" Chinese cabbage varieties. This species is not sensitive to low temperature reactions, it is not easy to vernalize and prematurely convulsions, through the cold bed nursery around April 10th and 20th, planting after 1 month, and live field growth of 3 different treatments exposed in early May. In the survey, we found that except for the cold bed nursery on April 8 and the very few strains planted on May 10, there was no convulsions after batch processing, and under the same conditions, other varieties of spring cabbage were used. There are different numbers of plants twitching, and some even cause no harvest. 2, determine the suitable age of 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.

3. Intensifying field management in spring planting Cabbage field management is different from the cultivation in the fall. 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, 4,000 kg of fertilizer is applied to Shinong, 15 kg of diammonium, and the row spacing is 0.5×0 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.

4. Pest Control The soft rot of the trial was only mildly occurring in the first period (planting on April 8 and colonizing on May 10). There was almost no such phenomenon in the second and third phases. Agro 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.

5, timely harvest

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