1, planting time: early-maturing varieties, middle and early August, middle and late-maturing varieties, late August to early September, late-maturing varieties, late August. 2. Planting method: loose and fertile plots rich in organic matter are selected as planting areas, and varieties with strong stress resistance are selected as planting objects. Then dig deep into the soil, furrow, apply organic fertilizer, and then sow seedlings in holes. After the seedlings grow 5-6 true leaves, transplant them in time.

First, the planting time and method of northern Chinese cabbage

1, planting time

North China is suitable for planting Chinese cabbage in autumn. Early-maturing varieties can be planted in early and middle August, middle and late-maturing varieties can be planted in late August to early September, and late-maturing varieties can be planted in late August.

2. Planting method

(1) Soil preparation and fertilization

① Chinese cabbage is generally suitable for planting in sandy loam with loose and fertile soil and rich organic matter content, but the previous crop is not suitable for planting cruciferous crops.

(2) Before sowing 1 week, deeply plough the soil and rake it carefully, then level the furrow to facilitate irrigation and drainage, and apply enough decomposed fertilizer in the furrow.

(2) sowing and raising seedlings

Choose cold-resistant, stress-resistant and disease-free seeds for sowing. There are three ways to sow: drill sowing, hole sowing and machine sowing. 3-4 seeds can be placed in each sowing hole, and the amount of seeds used per mu is about 0.5 kg. After sowing, water 1 time in time to keep the soil moist.

(3) Colonization

① After the seedlings enter the 5-6 leaf stage, they should be transplanted and planted. Transplanting can be carried out in sunny afternoon, and it is necessary to avoid the period with strong light at noon to improve the survival rate of seedlings.

② The transplanting density can be determined according to the soil, Chinese cabbage varieties and other conditions. The spacing between transplanted plants is generally about 20 cm, so it is beneficial to slow down the seedlings by watering them in time after transplanting.

(4) Scientific management

(1) At the heading stage of Chinese cabbage, topdressing nitrogen fertilizer 1 time, and auxiliary application of ammonia fertilizer; At the heading stage of Chinese cabbage, ammonia fertilizer was mainly applied, supplemented by nitrogen fertilizer.

(2) If you suffer from pests such as noctuid and aphid when planting, you can spray low-toxic drugs.

(3) If weeds appear in the field, they can be pulled out manually and try not to use herbicides.

(4) If anthrax occurs, 40% polysulfide suspension can be sprayed 600 times, 50% carbendazim 500 times, 80% anthrax thiram 800 times or cycloserine 1000 times at the initial stage of the disease, and spraying 1 time every 7- 10 days for 2-3 times continuously.

Second, what kind of cabbage is good?

1, Yu Yi Yingchun

(1) This variety is an early-maturing and high-quality spring cabbage, with a single ball weighing about 3-4 kg, folded leaves, cannonball-shaped appearance, light green outer leaves and milky yellow inner leaves, and good quality.

(2) This variety is bolting-resistant and cold-resistant, which is suitable for planting in greenhouses in northern areas such as North China in spring, in cold areas and high altitude areas in summer, and can be planted as autumn cabbage in Huanghuai area.

2. Yu Yi Yulinglong

(1) Yuyi Yulinglong is an excellent early-maturing variety of baby cabbage, with green outer leaves, beautiful appearance, yellow inner leaves and good taste.

(2) If the climate is suitable, it can be harvested about 50 days after planting, and a high clean vegetable rate can be obtained by timely harvesting. The weight of a single ball is about 300-500 grams, which is suitable for packaging and transportation.

(3) The variety has good disease resistance and bolting resistance, and can be planted in spring and autumn. Generally, it is suitable for planting in early spring reserve, open field in spring and autumn, northeast, northwest or high altitude latitude areas in summer.

3. Zhebai 6

(1) This variety is compact in plant type, with a leaf length of about 30 cm and a leaf width of about 16 cm. Its leaves are smooth and hairless, with light green color, waxy taste, good flavor and good quality.

(2) The variety is resistant to soft rot and downy mildew, high resistance to black spot, strong cold resistance, good bolting resistance, and relatively resistant to damp heat.

(3) This variety has fast growth speed and great growth potential. Generally, it takes 25-30 days to harvest in high temperature season and 40-60 days to harvest in winter and spring season.

(4) When planting in spring, it should be in? Cold tail and warm head? Proper topdressing can promote plant growth and inhibit bolting.

4. Huaxin Chinese cabbage

(1) This variety is surrounded by the terminal leaves of hemispherical root varieties and further strengthened, and the top of bulbous leaves turns outwards to form white or light yellow. Playboy? .

(2) This variety is early-maturing, and its growing period is generally about 60-80 days. Its plant is short, but it has strong heat resistance.

(3) This variety is mainly distributed in the middle and lower reaches of the Yangtze River. Bean sprouts? .

5. Loose leaf Chinese cabbage

(1) This variety is the original type of Chinese cabbage and the main variety of leafy vegetables in Dali in the off-season of spring and summer. Its growing period is generally about 50-60 days in spring and 35-40 days in summer.

(2) The leaves of this variety are spread out, the terminal buds are undeveloped, and no bulb is formed, so it has strong cold resistance and heat resistance, and the main product is mesophyll.

6. Early maturing varieties

(1) Jinbai 56: This variety is a first-generation hybrid of early-maturing Chinese cabbage bred by Tianjin Vegetable Research Institute, and its growth period is generally about 50-60 days.

(2) Qiulv 60: This variety is a first-generation hybrid of heading Chinese cabbage bred by Tianjin Vegetable Research Institute, and its growth period is generally about 60-65 days.

(3) Qiulv 55: This variety is a first-generation hybrid of heading Chinese cabbage bred by Tianjin Vegetable Research Institute, and its growth period is generally about 55 days.