When is the planting season of Chinese cabbage seeds?

Chinese cabbage can be divided into spring cabbage, summer cabbage, autumn cabbage and winter cabbage.

1. Suitable sowing date for spring cabbage: Generally, sowing is from late March to early April.

2. Suitable sowing date of summer cabbage: Generally, sowing is from mid-May to early July.

3. Suitable sowing date of autumn Chinese cabbage: Generally, sowing is 3-5 days before and after beginning of autumn, but it can also be postponed or advanced according to the actual weather conditions.

4. Suitable sowing date for Chinese cabbage overwintering: sowing in mid-September or early June 10.

Cabbage likes cold climate, the average temperature is 18-20℃, and it grows best in sunny conditions. It can safely overwinter at -2~-3℃. The temperature above 25℃ is weak, and it is easy to suffer from virus disease. Only a few heat-resistant varieties can be cultivated in summer.

Germinated seeds and green plants of Chinese cabbage complete vernalization within a certain number of days below 65438 05℃, with flower bud differentiation starting from seedling tip and leaf differentiation stopping. Bolting and flowering under long sunshine and high temperature. But the requirements of different varieties for long sunshine are obviously different.

Extended data:

1. When sowing Chinese cabbage in spring, the temperature is low, which is not conducive to seed germination and seedling growth. Sowing early, low temperature, easy bolting, flowering by vernalization, unable to form leaf bulbs, leading to the failure of spring ploughing. Sowing is too late, the temperature in the fruiting period is high, there is much rain, and soft rot is serious, so it is difficult to form leaf bulbs. Therefore, open field or plastic film mulching cultivation is suitable for sowing date, and the daily average temperature should be above 10℃.

So as to form a valve ball before the high temperature period comes. When the daily average outdoor temperature is stable at 5℃, it can be planted in shed or transplanted in cold bed, and the seedling age is about 30 days. When the outside temperature is stable above 10℃, sow in time, strengthen field management after planting, promote trees to live early, emerge early and bear fruit early, and improve yield. There are strict technical requirements for planting Chinese cabbage in spring.

Therefore, it is very important to solve the early bolting problem caused by low temperature and long sunshine in early spring. Varieties with short growth period, early maturity, low temperature tolerance, disease resistance and good nodulation should be selected for cultivation, and leaf bulbs should be formed before the high temperature season. At the same time, it is necessary to apply sufficient organic fertilizer and appropriate quick-acting fertilizer, strengthen intertillage weeding, promote growth, make it quickly enter the rosette stage, and accelerate the formation of leaf bulbs.

2. From sowing to harvesting, Chinese cabbage grows in a climate with suitable temperature in summer, so the sowing period is longer and more flexible. However, the supply of Chinese cabbage in summer from July to August is in a period of high temperature and rain, especially in the vast area south of the Yellow River, which is very unfavorable to heading of Chinese cabbage and serious pests and diseases.

Therefore, the suitable cultivation season and sowing date should be determined according to the characteristics of cultivated varieties. The sowing time of summer cabbage is flexible, and the planting purpose of summer cabbage is to supply the market and meet the requirements of consumers for a balanced supply of cabbage.

3. With the development of breeding, some new varieties of cold-resistant and heat-resistant Chinese cabbage have been cultivated one after another. Nowadays, Chinese cabbage is not only produced in autumn, but also planted in spring and summer, basically achieving annual production. But it is still mainly produced in autumn. Among them, autumn and winter Chinese cabbage has the largest cultivation area, the highest yield and the best quality.

According to the local climate, varieties, water and fertilizer conditions and product supply time, the suitable sowing date can be determined in the northern region. As far as a region is concerned, the sowing date of autumn and winter Chinese cabbage is quite strict, especially in the northern region. The performance is: sowing too early, high temperature, heavy rainfall, weak seedling growth, poor root development, easy to be infected with pests and diseases.

In addition, under the condition of high temperature, the root system will age rapidly, which will cause the whole plant to prematurely age, increase the number of dead leaves in the later stage and fall off seriously during storage. Sowing is too late, the growth date is not enough, the weather is getting colder and colder, and the light is insufficient. Although pests and diseases are reduced, the yield and quality of products are reduced.

4. China has a vast territory, and the climate between north and south is quite different, so the planting range of Chinese cabbage suitable for wintering is small. Generally, the whole growth period of Chinese cabbage is long from sowing to harvesting, and the low temperature or frosty weather at heading stage is not conducive to heading, or even serious freezing injury and death. Therefore, planting overwintering Chinese cabbage should be considered according to the local natural environment and climate characteristics.

Baidu encyclopedia-cabbage