In early spring, Chinese cabbage has high yield, is easy to cultivate, has a small amount of market, and has high economic benefits. It has been highly valued by vegetable farmers in recent years and has now become a major vegetable cultivation variety in many townships in Gu'an County. In early spring cabbage cultivation, attention should be paid to the following points:
I. Variety selection
Early spring Chinese cabbage should be resistant to low temperature, not easy to twitch, 50 to 55 days after planting mature varieties, or 65 days mature Huang Xin cabbage varieties. Farmers can choose spring king, spring dawn, new strength, Japan Liangqing, domestic strong, disease-resistant yellow heart and other varieties.
Second, the growth of suitable temperature
The optimum temperature during the early Chinese cabbage growth period is between 10°C and 22°C. If it is higher than 25°C, it will grow poorly. In early spring, Chinese cabbage is susceptible to low temperature in the early and mid-planting period, which promotes the differentiation of flower buds. It is also susceptible to high temperatures during the late growth period, making it difficult to form good leaf spheres. Third, nursery
In early spring, cabbage seedlings generally grow in the “spring†season. To prepare seedbeds before sowing, about 5 square meters of seedbed per acre is required. In a small shed or greenhouse, nursery with nutrients or paper bags, about 3,000 plants per acre, 1 to 2 seeds per acre, and soil after sowing 0.5 cm thick, covered with plastic film, at night to cover straw insulation. The seedling age is generally about 30 days.
Fourth, colonization
Early spring cabbage planting time before and after "convulsion". When planting requires seedlings have 4 to 5 true leaves, the temperature is stable at 10 °C ~ 13 °C is appropriate, each row planted 2 rows, spacing 40 cm.
V. Field Management
After transplanting, seedlings should be seedling-based to promote root growth. Afterwards, it will be a flood and water attack, depending on the weather conditions, water will be poured every 8 to 10 days, and water will be applied to 10 to 15 kg of urea or 20 kg of nitrogen and potassium fertilizers per mu. Avoid flooding and flooding. Precisely, during the growth stage, foliar fertilization can be applied by spraying a mixture of 0.2% potassium dihydrogen phosphate and 0.2% urea, and 0.7% calcium chloride can also be sprayed to promote the long-leafed leaf and prevent it. Dry heartburn. At the same time, pay attention to air release to prevent the growth of soft rot caused by high temperature and humidity.
In the early spring, the Chinese cabbage generally has few pests during the whole growing period. If spraying, some foliar fertilizers may be added to spray the fertilizer to increase the control effect. It is generally marketed from late April to early May.
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