Main points of cultivation techniques of summer and autumn cabbage

1. Choose suitable varieties

Summer and autumn production should choose early maturity, heat resistance, fast growth, beautiful leaf ball, high-yield and stable product varieties.

2. Seed in time

According to the climatic characteristics of summer and autumn and the time to market, choosing the right planting is the key to obtain high yield and increase income. Generally, it is sown in phases from early June to mid-July, the seedling age is 35-40d, and it is planted in batches. It can be harvested and supplied to the market one after another during the autumn and autumn period from August to October.

3. Cultivate strong seedlings

Strong seedlings are the basis for the high yield of autumn cabbage. Xiaqiu cabbage uses open field seeding or plug tray seedlings. The spreading seedling bed should choose the deep soil layer, loose and fertile land with good drainage. When the seedlings grow to 3-4 true leaves, depending on the seedling growth, climatic conditions and the degree of soil dryness and wetness, the application of light and rot manure or manure water or urea can promote the healthy growth of seedlings. However, the temperature in summer and autumn is high, and there are many rainstorms, so it is necessary to cover the shading net and set up a shade to cool down and prevent rain.

4. Site preparation

The plots to be planted should be those with deep soil layers, loose and fertile soil, good drainage, and strong water retention and fertility. Turn the soil 15-20 days before planting, apply 40 kg of compound fertilizer or 5-10 kg of urea, 20-30 kg of superphosphate, 20 kg of potassium chloride and mix with the appropriate amount of rot compost, or apply 2500-3000 kg of rot and manure. After applying the base fertilizer, dig the drainage channels around the fields, and then dig the trenches to build the border.

5. Colonization

When the seedlings have 5-6 true leaves and the seedling age is 35-40 days, choose cloudy or sunny afternoon planting, planting about 3000-3500 plants per mu. Apply urea once after the living tree, so as to return to green and survive, and promote growth.

6. Strengthen fertilizer and water management

After planting, water 2-3 times to promote seedlings to return to life as soon as possible. After the seedlings survive, properly control the fertilizer and water to squat seedlings, promote root growth, enhance the ability to absorb nutrients, and make it quickly enter the rosette stage. After entering the rosette stage, the early stage and the middle stage of the head, the growth of the plant gradually increased, the leaf area increased, the amount of fertilizer and water gradually increased, and the fertilizer should be topped up in time.

7. Main pest control

Summer and autumn cabbage diseases are mainly soft rot and black rot. Soft rot can be sprayed with 58% metalaxyl manganese zinc 500-600 times solution, and black rot can be sprayed with agricultural streptomycin. Insect pests are Pieris rapae, Plutella xylostella, aphids, yellow strip beetle, Spodoptera exigua, Spodoptera litura, Spodoptera litura, and Spodoptera litura. It can be sprayed with 400 times of BT emulsion and 500 times of avermectin.

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