Variety selection: should choose medium-late maturing varieties with good early maturity, strong heat resistance, strong disease resistance, and high yield storage.
Sowing at the right time: The growth period of early-ripe autumn cabbage is generally 50-60 days, and it is necessary to catch up with the mid-late ripe autumn cabbage in the large-scale planting area. In early August, about 10 days before the beginning of the autumn is appropriate, and the listing period can be before the National Day. Seeding is too early to induce pests and diseases, and the late planting period delays the listing period and reduces the value of commodities.
Balanced fertilization: Early-maturing autumn cabbage is a high-yield vegetable variety, generally producing about 4,000 kg per mu. The demand for fertilizer is large, and the principle of fertilization is to apply heavy fertilizer and appropriate topdressing. Before planting, combined with 5,000 kg of high-quality farmyard manure and 40 kg of high-nitrogen, low-phosphorus and potassium-type compound fertilizer. It is best to use a plot of cruciferous vegetables that has not been planted. For example, if the plot is planted for many years, it is necessary to apply 2-3 kg of bio-fertilizer per acre to improve soil conditions and enhance the ability of cabbage to resist pests and diseases.
Field management: In the high temperature, high humidity and rainy season, the roots of Chinese cabbage are shallow, not tolerant to drought and intolerant. If severe drought and locust weather occur, pests and diseases will occur. In production, sorghum cultivation technology can be used to ensure that it can be protected from drought and can be drained. It should be planted on-demand, with 3 to 4 seeds per hole and twice in between. After the seedlings are strictly controlled, the seedlings are kept for about 10 days. After entering the rosette period, the fertilizer and water management will be strengthened. In the initial stage of the rosette, 20 kg of urea or nitrogen and potassium fertilizer will be applied in combination with watering, and 20 kg of urea will be applied in the peak of the ball. In the ball-forming period, the soil is dry and wet, ensuring sufficient water supply.
Disease prevention and control of insects: Under high temperature and high humidity conditions, pests and diseases are prone to aphids, tobacco budworms, cabbage caterpillars, soft rots and so on. For aphids, it is possible to spray with imidacloprid 1000 times solution, and insects such as tobacco budworm and cabbage caterpillar are sprayed with beta-cypermethrin 1500 times solution. Chinese cabbage soft rot is extremely common in high-humidity environment. In the early stage of the disease, Jinggangmycin and lysine copper spray can be used for prevention and control. Serious rooting should be removed and taken out of the field for deep burial treatment. Quicklime prevents the spread of germs.
Timely harvest: Early maturing autumn cabbage has a short growth period, generally around 50-60 days. When the leaf ball grows to a compact porcelain, the outer leaves are yellow flowers, and the weight per plant is about 2 kg, it can be harvested. When cutting, use a machete or a kitchen knife to cut off the base of the cabbage root, remove the old leaves, diseased leaves and yellow leaves outside, and keep two or three leaves outside the leaf ball to prevent mechanical damage to protect the leaf ball.
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