1. Live broadcast cultivation

This method is relatively simple and labor-saving, and can be harvested earlier than transplanting. Generally, early cabbage hearts are harvested in the hot and rainy season from June to August or in the late This method is used for sowing cabbage when it is cold and rainy from February to March. However, the disadvantages of direct seeding are that the vegetable moss is uneven in size, easy to become hollow, and bolts irregularly. The vegetable moss is light in color and of poor quality. It also takes a long time to occupy the field for direct seeding. The land utilization rate is low and a large amount of seeds is used. Generally, the amount of seeds used per acre for direct seeding is 300g to 500g.

2. Transplantation and cultivation

Grow the seedlings for 18 to 25 days and then transplant them to field cultivation. This method can improve land utilization, the plants grow neatly, the harvest period is concentrated, the vegetable moss grows evenly, and the quality is good. Save seeds, only about 70 grams of seeds are needed for planting one acre of land. However, transplantation is labor-intensive and requires high skills. This method is generally used for medium and late maturing cabbage cultivation.

3. Soil treatment

For live cultivation of cabbage, there are many weeds in the field. You can use 75% chlorothalonil wettable powder 800-1000 times of liquid spraying or drenching before transplanting. Wet border surface,

4. Field management

(1) Fertilization

In addition to applying sufficient base fertilizer, cabbage must be top-dressed. The base fertilizer can be decomposed fertilizer, and the top dressing should be applied early, thinly, and frequently after planting. Generally, top dressing is done once every 4 to 5 days. For top dressing, quick-acting nitrogen fertilizers, such as urea, decomposed human excrement or peanut bran, etc. can be used, combined with watering. Choy sum mainly uses nitrogen fertilizer, but phosphorus and potassium fertilizers are also very important. Phosphorus and potassium fertilizers can be added to the base fertilizer, such as potassium chloride or compound fertilizer. 20 kilograms of compound fertilizer can be used per acre combined with existing fertilizer as base fertilizer.

(2) Watering

Cai Sum has strict water requirements, so the watering method and time must be correctly mastered. When spraying water, the water droplets should be evenly sprinkled on the border and leaf surfaces, and large water droplets should be avoided. Generally, water should be poured once in the morning and evening on sunny days, and "noon water" should be poured on at 11 a.m. in hot weather. Watering at noon during low temperature periods in winter and spring can increase the soil temperature.

5. Harvesting

When harvesting cabbage, the standard is to use the vegetable moss to be "full of flowers". If harvested too early, the yield will be low, and if harvested late, the quality will be poor. When harvesting, use a knife to cut off the stems at the elongation point. Harvesting vegetable moss should be done in the morning. After harvesting, sprinkle some water on it to keep it moist. Generally, early-maturing species have a shorter harvest period, while late-maturing species have a longer harvest period, up to 10 to 15 days.

Extended information:

The economic value of cabbage

Cai Sum is a popular vegetable in the Jiangnan region of China. In northern China, the production area is very small and the consumption is also very small. It belongs to the ranks of rare special vegetables. The reason why cabbage has not developed in the north is probably as follows: Spring and summer are the right times for cultivating cabbage, but northerners like to eat fruits and vegetables.

At this time, fruits and vegetables are on the market, and vegetables such as cucumbers, tomatoes, and eggplants have squeezed the Chinese cabbage out of the market. The high yield, easy cultivation, and popular food of Chinese cabbage in autumn are unmatched by Chinese cabbage. Naturally, it is impossible for cabbage to replace Chinese cabbage and be cultivated in large quantities; cabbage in the south of the Yangtze River has the advantage of continuing to grow in winter and being harvested and supplied to the market. This advantage cannot be exerted in the north due to severe cold restrictions.

The above is the situation before the 1980s. After the 1990s, with the rapid development of social economy, personnel exchanges became frequent, especially the rapid economic development of Guangdong, with Guangdong personnel spread all over the country.

As a result, the living habits and food requirements of Cantonese people have gradually spread to all parts of the country. The cabbage sum they like to eat has gradually expanded to the market, starting from hotels and restaurants, and the demand is increasing. This social demand naturally stimulates the development of production.