Summer cabbage is a Chinese cabbage that is listed between summer and autumn. However, due to the high temperature and heavy rain in summer, it is the season of high incidence of pests and diseases. When planting Chinese cabbage, we must grasp the key links. We must select the varieties and adopt appropriate management measures to achieve stable production and high yield.

Summer cabbage varieties are characterized by heat resistance, antiviral disease, soft rot resistance, glare resistance, moisture tolerance, short growth period, high vegetable yield, high yield and quality. Such as heat anti-white -45, early maturity 5, Xiafeng, Xialu, Xia Qiubao, Japan Xiahui, Xiayou, Xiayang, etc. adapted to summer sowing cabbage varieties.

Fine land preparation. In order to reduce the disease and the lack of certain elements in the soil, avoid the continuous cropping with cruciferous crops, combined with the short-lived characteristics of summer cabbage, re-apply organic fertilizer. Summer cabbage grows vigorously, and the demand for water and fertilizer is large but not resistant. The production should be based on the cultivation method of heavy application of base fertilizer and semi-high ridge planting, so that the watering can moisturize the ridge surface and drain after rain. High-quality organic fertilizer 3000 ~ 5000 kg, superphosphate 30 ~ 50 kg, potassium chloride or potassium sulfate 10 ~ 20 kg.

Sowing at the right time. Sowing from mid-May to early July. The seeding method is divided into strips and holes. The amount of seed used for acreage is about 0.25 kg, and the amount of seed for acre is about 0.15 kg. In order to ensure Miao Qi, Miao Wang, regardless of the sowing or hole sowing should pay attention to the following points: 1. After sowing, watering the ditch, but the water should not flow over the ridge surface, so as not to cause the soil surface knot, affecting the emergence of seedlings. 2. It is required that the seeding ditch or the bottom of the hole is relatively flat, and the covering soil is mainly loose and fine soil, and it should not be too thin or too thick. 3. Cabbage shoots are most afraid of sun exposure, usually in the evening or afternoon sowing, so that the shoots are unearthed after 2 days, after a night and then exposed to the sun. 4. Pay attention to the prevention and control of pests.

Field management. 1. Watering in time. The sowing date of Xia Dacai is in the hot season. In order to ensure the seedlings, seedlings and seedlings after sowing, watering must be done in time. Generally, the three-water and seedling measures are adopted, that is, one water is poured after sowing, two waters are poured into the arch soil, and the third water is poured after the seedlings are out. On the one hand, watering meets the needs of germination and emergence of Chinese cabbage, and more importantly, it is to reduce soil temperature and prevent viral diseases. If you encounter a cloudy day after the broadcast, you can reduce the number of watering. 2. Seedling management. Morning seedlings (fractional seedlings), late seedlings, set strong seedlings. Regardless of the seeding and hole broadcasting, it is generally necessary to have 3 seedlings. The first time in the heart leaf occurs (such as not overcrowded, but not in the case), the second time in 2 to 3 leaves, the third time in 5 to 6 pieces of seedlings. Because the growth period of summer cabbage is short, it is generally not a seedling, and the fertilizer is promoted to the end. Watering and loosening in time, when the weather is dry and rain-free, water should be poured every 2 to 3 days. When there is water in the rainy days, it should be discharged in time to prevent the seedlings from being affected by the water. 3. Cultivate the plan. The cultivating should be shallow, to prevent damage to the root system, and to avoid spreading diseases such as viruses. Combine cultivating to remove weeds while paying attention to watering. Under drought conditions, water should be poured every 5 to 6 days to keep the soil moist in the field and prevent it from drying out. 4. Fertilizer management. After the seedlings are fixed, 15 kg of urea will be applied per acre with water, and the second top dressing will be carried out during the ball-forming period, and 25 kg of urea can be used for the mu. The balling period is still centered on watering and topdressing. The watering time can be extended appropriately. Every 8 to 9 days, if there is any condition in the early stage of the ball, some fertilizer can be applied.

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