How to choose and keep a seed for cabbage? What are the methods of raising seedlings?

Cabbage, also known as cabbage, is one of our common vegetables, with various practices and rich nutrition. Regular consumption is very beneficial to the human body and is deeply loved by people. Nowadays, there are more farmers growing cabbage, and cabbage can grow several crops a year. When planting cabbage, the most important thing is to raise seedlings. So how to choose and keep the seeds of cabbage? What are the methods of raising seedlings? Next, let's have a look with the editor.

First, how to choose and keep the seeds of cabbage?

Cabbage planting must select full, mildew-free seeds, need to retain seeds of cabbage to select strong plants, disease plants and thin plants can be avoided directly. At the same time, if you miss the planting season, it is also recommended not to leave seeds, you can try to choose to keep seeds in the corner of the field, so that it is both ventilated and does not take up space.

In addition, in the process of keeping seeds, if there are a variety of similar varieties, certain targeted measures can be taken, such as separate pollination, marking and protection, so as to avoid beads. Of course, some special varieties may have to go through special treatment before they can be retained. All in all, the retention of cabbage seeds needs to follow certain conditions, and should know how to deal with it.

Second, how to harvest cabbage seeds?

The most critical link in harvesting cabbage seeds is to grasp the harvest time. If the cabbage seeds can be threshed by gently kneading them with their hands, this is the best harvest practice for cabbage seeds. When the cabbage seeds are harvested, they should be dried in time for a period of time, knead off the shell, clear the magazine, and finally dry and store.

Third, what are the seedling methods of cabbage?

1. Fertilizing and making beds

Yang border can be used for seedling breeding. 200 kg of mature high quality ring fertilizer is applied to each standard Yang border (0.05 mu), followed by 70-80 kg of rotten dried dung or chicken manure, 2-3 kg of superphosphate and 10 kg of plant ash. Turn deeply and rake flat after fertilization, leave the sifted fine soil to cover the soil, cover the sunny bed with plastic film, and sow after 15-20 days when the ground temperature rises.

2. Sowing at the right time

Spring cabbage has strict requirements on sowing date, and the suitable sowing date should be determined according to the winter strength of cabbage, local climatic conditions and seedling raising methods (sunny bed seedling, improved sunny bed seedling, hotbed seedling, greenhouse seedling). For example, the seedling age of late-maturing varieties is long, and most of them are sown in late autumn and early winter, while the seedling age of early-maturing varieties is short, and most of them are sown in early January; seedlings raised in greenhouse and hotbed can be sown from mid-late December to January. Cabbage seeds are easy to germinate, generally do not need seed soaking, germination and other seed treatment, if the germination rate of the purchased seeds is low, it can also be soaked in warm water. Pour water through the seedling bed before sowing, sow the seeds evenly after sowing, and cover the fine soil 1-1.5 cm thick after sowing. Cover the plastic film strictly after sowing, pay attention to the heat preservation of the seedling bed to facilitate seedling emergence, and keep it at 20 ℃-25 ℃ during the day.

3. Seedling management

The management of seedlings sown before winter should be "controlled first and then promoted". First control: after the seedlings come out before overwintering, the temperature is 10 ℃-15 ℃ during the day and 5 ℃-8 ℃ at night to avoid overwintering and cause early bolting. Pay attention to cold protection and heat preservation when overwintering. Post-promotion: increase fertilizer and water, increase temperature and promote seedling growth after seedling separation in the second spring. Divide the seedlings in the 3-leaf stage and choose warm weather. It is best to have several sunny days after the seedlings are divided. When dividing the seedling, dig up the seedling with a shovel, open a shallow ditch according to the row spacing of 10 cm in the seedling border, after watering in the ditch, stick the seedling to the edge of the ditch according to the plant spacing of 8-10 cm when the water seeps to half, so that the root system of the seedling is stretched and then covered with soil, and the depth is the same as the original depth of the seedling. After seedling separation, the seedling bed was controlled for 20 ℃ during the day and 10 ℃ at night to promote root growth. After slowing down the seedlings, the temperature decreased slightly, 15 ℃-20 ℃ in the daytime and 8 ℃-10 ℃ at night to prevent the vernalization of the seedlings caused by too low temperature. Adequate light should be ensured at the seedling stage to promote the robust growth of seedlings. Combined with temperature management, proper ventilation and dehumidification, in cloudy and snowy days, we should pay more attention to reduce humidity, so as to avoid disease.

4. Refining seedlings

The seedlings were watered and cut 7-10 days before planting, and the seedlings were refined at low temperature to reduce the temperature as much as possible without freezing damage, so as to adapt to the low temperature environment in the open field in spring.

5. Strong seedling standard

The morphological characteristics of healthy seedlings of cabbage are as follows: 6-8 true leaves, short Hypocotyl and internodes, thick and dark leaves, stout stems and well-developed roots.

The above is the introduction of cabbage, when farmers harvest cabbage, they should choose when the leaf ball of cabbage is tight and the outer leaves are shining, which can ensure the quality and output of cabbage.

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