I. Variety selection: Choose mid-maturing varieties from September to October. There are 60-day green stalk cabbage heart, green stalk willow cabbage heart, yellow leaf center, and large flower ball center dish. November-In March of the following year, the late-maturing varieties will be protected for cultivation. The varieties include Chixin 29, Chicaixin 2, Guilin twisted leaves, and March Yuecaixin.

Second, land preparation and seeding: first of all, deep soil 25-30 cm deep, smashing soil blocks, fine leveling, combined with deep soil can be applied 3,000 kg of organic fertilizer, 25 kg of superphosphate. In early spring and late autumn, flat sedges can be used. In the early summer to late autumn, high sedges must be planted to prevent rain and waterlogging.

Live broadcast: 150-180 grams per mu. Seedling raising: 400-500 grams per mu. The sowing depth is about 1.2 cm, which can be broadcast or drilled.

Third, thin seedlings and planting: seedlings before 3 leaves of seedlings and time seedlings, 5 seedlings in time. The seedling field can be planted in time when the seedlings have 5 leaves.

4. Reasonable density: The number of early-maturing varieties per mu is 32,000, and the row spacing is 16 × 13 cm. The number of late-maturing varieties per mu is 16,000-17,000, and the row spacing is 22 × 16 cm.

V. Field management: After planting or planting Chinese cabbage, weeding and weeding 1-2 times in the middle and early stages of growth should be timely, which is conducive to soil moisture retention and timely weed elimination. Combined with seedling water and planting water, 20 kg of ammonium sulfate or 10 kg of urea can be applied per mu. Combined with pouring water, ternary compound fertilizer 25 kg / mu was applied with the water.

In order to promote the growth and development of lateral moss, about 5 days after the main stem is harvested, combined with watering acres to apply about 15 kg of urea.

6. Pest and disease control: The main diseases of cabbage heart are downy mildew, black spot disease, soft rot and sclerotinia sclerotiorum, and the pests include cabbage worm, cabbage worm and aphid. It is necessary to carry out pharmaceutical control in a timely manner, and to follow the variety of non-polluted vegetable production and the interval between safe drug use.

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