When is the best time to plant summer cabbage? What varieties do you have? Attached summer management technology

Chinese cabbage originated in northern China, is a leaf vegetable of Brassica cruciferae, usually refers to Chinese cabbage. It is introduced to the south and cultivated in all parts of the north and south. So when is the best time to plant summer cabbage? What varieties do you have? What are the management techniques in summer?

When is the best time to plant summer cabbage?

Summer cabbage is a kind of Chinese cabbage listed between summer and autumn, which is in the off-season of vegetable supply and has considerable economic benefits. Summer cabbage is generally arranged for sowing from mid-May to early July.

What kinds of summer cabbage do you have?

Summer cabbage is cultivated in high temperature season in summer and autumn, also known as "hot cabbage" and "Fu cabbage". The representative varieties are Shanghai cabbage, Guangzhou Mal cabbage, Nanjing Aiza No.1 and so on.

Management techniques of Chinese cabbage in summer

First, select excellent varieties: select excellent cabbage varieties with strong heat tolerance, strong resistance and high yield, such as Kangre 45, Xiafeng, Xialu and so on.

Second, sowing date: the suitable sowing time in summer is from the beginning of June to the end of July.

Third, soil preparation and ridging: after the last crop harvest, per mu of rotten organic fertilizer 3000-5000 kg, ternary compound fertilizer 75 kg, calcium superphosphate 20 kg, zinc sulfate 10 kg, deep turning and fine raking after fertilization to achieve land leveling. In order to facilitate drainage, it is best to use high ridges or high ridges during cultivation, with a ridge distance of 4l0 cm and a border width of 100cm. In order to prevent the occurrence of diseases and insect pests, 0.75 kg of methyl thiophanate per mu can be mixed with 10 kg of fine soil and buried under the ridge.

4. Sowing method: in order to save seeds during direct seeding, hole sowing is better, plant spacing is 33 cm to 37 cm, row spacing is 40 cm, plant spacing is 4500cm to 5000 plants per mu, seed consumption is 50cm 100g per mu, cover 0.5 cm thick fine soil after sowing, and hold flat compaction.

V. Field management

1. Interseedling and fixed seedling: the first seedling was carried out at 3-4 leaf stage, and the seedling was fixed at 5-6 leaf stage. Try not to hurt the roots when setting the seedlings, so as to prevent the soft rot of the roots, and protect 45005000 seedlings per mu.

two。 Fertilizer and water management: high temperature in summer, soil moisture evaporation fast, should always keep the soil moist, strictly prevent soil moisture uneven. The amount of water should be increased in high temperature and dry weather and drained in time during or after rain to prevent rotting roots caused by stagnant water in the field. The heart of summer cabbage was watered once in the first 10-15 days, and then ploughed and watered with squatting seedlings, followed by a heart-strengthening fertilizer. During the heading period, attention should be paid to keeping soil moisture, watering in time when the surface is white, combined with watering and applying 10 kg urea or 15 kg ammonium sulfate per mu, mainly in holes or furrows, and the fertilizer application point should be 8 cm away from the plant to avoid root damage. Stop watering 5-7 days before harvest.

3. Vegetable field mulching: for heat preservation and weeding, the seedlings are fixed and covered with wheat straw or rice straw.

4. Pest control: the main diseases of summer cabbage are downy mildew and soft rot. The diseased plants should be pulled out in time. In the prevention and control of downy mildew, 40% ethyl phosphorus aluminum wettable powder 200 × 300 times or 50% Ruidu manganese zinc 500 times 600 times can be sprayed at the initial stage of the disease. In the early stage of the disease, Fengchanling 200g / mu can be sprayed with 100kg water, and agricultural streptomycin wettable powder 3000kg / mu can be sprayed with 4000 times liquid. The main pest of summer cabbage is Pieris rapae, which can be controlled by Jiaoke and Lubao or once net.