Summer cabbage is a Chinese cabbage that is listed between summer and autumn. However, due to the high temperature and high rainfall in summer, it is a season of high incidence of diseases and insect pests. When planting Chinese cabbage, we must grasp the key links, and we must select suitable products and adopt appropriate management measures in order to achieve stable production and high yields.
The varieties of summer cabbage are required to have the characteristics of heat resistance, antiviral disease, resistance to soft rot, resistance to light, moisture, short growth period, high net rate, high yield and high quality. Such as heat and anti-white 45, early-maturing on the 5th, Xiafeng, Xia Lu, Xia Qiubao, Japan Xia Hui, Xia You, Xia Yang cabbage varieties adapted to summer sowing.
Fine site preparation. In order to reduce the disease and the lack of a certain element in the soil, avoid continuous cropping with crucifer crops. In combination with the short growing period of summer cabbage, organic fertilizer should be re-applied. The growth of summer cabbage is strong, and the demand for water and fertilizer is large but not tolerant. The cultivation method of replanting base fertilizer and semi-high ridge planting should be adopted in production so that the water can run through the ridge and the drainage after the rain, and can be cooked with Mushi. High-quality organic fertilizer 3000 ~ 5000 kg, superphosphate 30 ~ 50 kg, potassium chloride or potassium sulfate 10 ~ 20 kg.
Proper sowing. Sowing from mid-May to early July. Sowing method points sowing and sowing. The amount of seed used for seed drilling is about 0.25 kg, and that for seed sowing is 0.15 kg. In order to ensure that Miao Qi, Miao Wang, regardless of drilling or sowing should pay attention to the following points: 1. After the seeding ditch ditch watering, but the water should not diffuse over the ridge, so as not to cause soil surface hardening, affecting emergence. 2. Request to sow the ditch or the bottom of the hole more flat, cover the soil with loose soil, not too thin or too thick. 3. Cabbage young shoots are most afraid of sun exposure. They are usually planted in the evening or in the afternoon so that young shoots will be excavated in 2 days and then exposed to the sun overnight. 4. Pay attention to pest control.
Field management. 1. Watering in time. The sowing date of summer cabbage is in hot season. To ensure seedlings, seedlings and seedlings are fully seeded, they must be watered in time. Generally use three water Qimiao measures, that is, after sowing a water, soil water poured into the arch, the seedlings poured out after the third water. Watering on the one hand satisfies the need for sprouting and unearthing of Chinese cabbage. What is more important is to reduce soil temperature and prevent the occurrence of viral diseases. If you encounter cloudy days after sowing, you can reduce the number of watering. 2. Seedling management. Early seedlings (several seedlings), seedlings in the evening, strong seedlings. Regardless of seeding and sowing, it is generally necessary to seedlings three times. The first time the heart occurs (if not overcrowded, but not between), the second time in 2 to 3 leaves, the third time in 5 to 6 when the seedlings. Due to the short growth period of summer cabbage, it is generally not seedlings. Timely watering, loose soil, in case of dry and rainy conditions, water every 2 to 3 days, once in the case of rainy days when there is accumulated water in the fields, to prevent seedlings from being affected by waterlogging. 3. The cultivator plan. The cultivator should be shallow to prevent damage to the root system and to prevent transmission of viruses and other diseases. With the cultivator to remove weeds, pay attention to watering. In arid conditions, water should be poured every 5 to 6 days to keep the soil moist and prevent it from drying out. 4. Fertilizer management. After setting the seedlings, 15 kg of urea is applied per acre with water, and the second fertilizer is applied during the ball stage, and 25 kg of urea can be used for mu. The ball stage is still centered on watering and topdressing. The watering time can be prolonged. Once every 8 to 9 days, there is a condition in the early stage of the ball. Then some chemical fertilizers can be applied.
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