When can the Chinese cabbage not be watered

The beginning of autumn is not autumn, and the summer is the beginning of autumn.

Although it is almost half a month since the beginning of autumn, the temperature has not changed much. In most parts of Hubei, high temperatures continue. However, after today's heatstroke, the weather has gradually cooled down a lot in the morning and evening, and the maximum temperature has dropped to 34 35, but it is still relatively high.

Although the temperature at noon is scorching, the Chinese cabbage has been sown for several days.

For the temperature is still relatively high, when we plant cabbage, how to water it so that the cabbage can grow well?

1. Bottom water. Bottom water, I don't know if there is such a name, I myself call the watering before sowing "bottom water", which means the same as bottom fertilizer. Before sowing seeds, water the soil so that it retains sufficient moisture to facilitate seed germination.

When pouring the bottom water, it is better to soak it completely to maximize the amount of water.

However, the main thing that needs to be done here is that the seeds should not be planted immediately after the bottom water has been watered. Because the humidity is too high and the cabbage seeds are small, it is easy to soak the seeds. So after watering, we have to wait a few hours or half a day before sowing the seeds.

Second, the seedling water. When we sow the Chinese cabbage after germination, can not be watered immediately, when the seedlings grow to 5 6 leaves, if you want to transplant, you can transplant, if you do not transplant, you can carry out a seedling topdressing. After top dressing, a watering is carried out.

The temperature is relatively high in the early stage, and we generally water in the afternoon or midnight, when the soil is cooler and watered.

3. Watering during the rosette period. The reason for watering in the rosette stage is that Chinese cabbage needs more fertilizer and water during the period from the rosette stage to the core stage. There is a lack of water, which is not conducive to the growth of the core. During this period, it is also possible to water along with top dressing.

When the Chinese cabbage grows relatively large, we water it mainly to see the dryness and wetness of the soil. During the period of frequent rain, it is basically possible not to water, and for a long period of drought, it is necessary to water frequently, preferably semi-dry and semi-wet. The final number of watering needs to be determined according to the actual situation.

Stop watering 7 days before the harvest of Chinese cabbage, so as not to have high moisture content, brittle and tender tissue, not resistant to handling and easy to cause mechanical damage, affecting the storage effect. In the middle and late stages of cabbage growth, soil drought can trigger dry heartburn.

Such cabbage will continue to develop heartburn during storage. Timely irrigation is also one of the important measures to prevent dry heartburn.

The sowing date of Chinese cabbage in different regions is also different, sowing a few days early, the yield may be higher, but the probability of disease is hit, entering the senescence stage early, the storage tolerance is reduced, and it is easy to burst during the storage period, affecting the quality and commodity value.

A few days late sowing, although the disease is reduced, but it is easy to affect the yield, poor balling, delayed harvest and freezing in the field. In order to obtain high-yield, high-quality, and storage-ready Chinese cabbage, it is better to sow late within the appropriate range of local sowing period.

When the Chinese cabbage can not be watered, it is before the harvest, under normal circumstances, about a week before the harvest, it can not be watered again, so that the cabbage is not easy to be damaged when it is received, it is more convenient to harvest, and the harvesting quality of the cabbage is maintained.

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The cabbage stopped growing several times, and the watering stopped a few days before harvesting the cabbage.

1. Chinese cabbage will stop growing at a temperature of minus 11. Chinese cabbage can grow normally in a temperature of 5 -25, it has a strong ability to tolerate low temperatures, and can grow and develop in a cold environment. Stop watering 7 days before harvesting Chinese cabbage.

The moisture content in the cabbage should not be too high when harvesting, once the cabbage contains too much water, the tissue of the cabbage will be relatively crisp and tender, and the cabbage that is too crisp and tender is not suitable for handling and is easy to be damaged during the handling.

It is summarized into four periods, namely, bottom water moisture formation, seedling stage, rosette stage and bulboding stage.

1. Bottom water moisture of Chinese cabbage: before sowing, water the bottom water once according to the soil moisture to create moisture, which can reduce the soil temperature, which is conducive to seed germination and reduces the probability of virus disease and downy mildew.

2. Watering of Chinese cabbage at the seedling stage: The watering at the seedling stage implements "three water seedlings and five water fixed trees", which is an effective measure to avoid the occurrence of viral diseases and cultivate strong seedlings. That is, the first water is poured 24 hours after sowing; When a small amount of seedlings is just unearthed, water them for the second time; Wait for the seedlings to be fully out of the water for the third time; The seedlings grow to the cross stage, and the seedlings are watered for the fourth time after interspersing; When the true leaves appear to about 10, they should be watered once again.

At the same time, attention should be paid to the drainage at the seedling stage to reduce the occurrence of black rot and soft rot in the later stage.

3. Watering technology at the rosette stage of Chinese cabbage: the growth and growth rate of plants during this period are very large, so the absorption of water and fertilizer increases. The rosette leaf growing at this stage is the organ that produces a large number of photosynthetic products in the bulb setting stage in the future, and sufficient fertilization and watering to ensure the strong growth of rosette leaf is the key to the abundant yield of Chinese cabbage.

However, at the same time, it is also necessary to pay attention to prevent the rosette leaves from growing and delaying the balling period, generally fully watering immediately after applying the fertiliser, and then keep the soil dry and wet during the rosette.

Fourth, the watering requirements of Chinese cabbage balling period: the balling period is the period when Chinese cabbage requires more water. After the first water is watered at the end of squatting, it is necessary to wait for the soil to yellow and moisture, and then water the second time.

After the second watering, water every 7 to 8 days until 7 to 8 days before harvest, watering evenly and consistently to keep the soil moist.

The watering of cabbage needs to be divided into situations.

Cabbage growth into the rosette period to "squat seedlings", about 10 days before the heart, suspend watering. This promotes the deep development of the root system, absorbs more water and nutrients, and facilitates the healthy growth of cabbage, thickens the leaves, and increases the yield. The squatting time of the bird god is generally 7 to 10 days, during this period, the cabbage is observed to wilt at noon, and the color changes from light green to dark green.

The soil moisture content is about 16%, stop squatting. When the cabbage begins to wrap the heart, it must be poured once in a row, and it must be watered twice every 2 to 3 days. In the future, it is necessary to keep the soil moist, usually once every 5 to 7 days.

Stop watering 10 days before harvest. Chinese cabbage needs to be watered 4 times during the growth management. In order to have a high and stable yield of Chinese cabbage, we must pay attention to the prevention and control of pests and diseases at the seedling stage.

Chinese cabbage

Cabbage, a Brassica plant of the cruciferous family, is known as the "king of vegetables". Cabbage is native to northern China, cultivated in the north and south, and was introduced to Japan, Europe and the United States in the 19th century. It has wide green leaves and white cabbage gangs, and multiple leaves are tightly wrapped together to form a cylinder.

Most of them form a dense head, and the leaves that are encased in them are pale green or even yellowish because they do not see sunlight. Cabbage and cabbage are two large families of cruciferous vegetables, both of which have numerous members. But in general, the cabbage type has a layer of wax on the leaves (this layer of wax is key to the universality of cabbage), and the color is always a little blue.

Chinese cabbage is generally watered once every 5-7 days, Chinese cabbage is suitable for sowing around the beginning of autumn every year, the temperature at this time is higher, which is conducive to seed germination, before sowing, the soil needs to be cultivated delicately, remove stones and weeds in the soil, and also need to add base fertilizer to the soil to promote the better growth of Chinese cabbage.

- 7 days

Chinese cabbage is generally watered once every 5-7 days, watering needs to water the soil thoroughly, so that the soil is kept moist, pay attention to the rain, but also need to drain the soil in time to avoid Chinese cabbage in a moist environment for a long time, the root system of the plant rots.

2. Sowing time

Chinese cabbage is suitable for sowing around the beginning of autumn every year, the temperature and humidity at this time are higher, which is conducive to the growth of Chinese cabbage seeds to shoot shoots, so as to improve the growth rate of the plant, if the seeds of Chinese cabbage belong to the medium or late ripening of the auspicious mu species, the latest can be sown in the middle of autumn.

3. Provide soil

Chinese cabbage is suitable for planting in loose and fertile soil, before sowing, the soil needs to be cultivated delicately, remove stones and weeds in the soil, so that Chinese cabbage can be unearthed smoothly, and also need to add base fertilizer to the soil to promote the better growth of Chinese cabbage.

4. Pest protection

In the process of Chinese cabbage growth, the plant is prone to soft rot, which shows signs of leaf wilting and rot, so it is necessary to immediately uproot the diseased Chinese cabbage and disinfect the soil to prevent the spread of the disease.

Watering at the seedling stage of cabbage, watering at the rosette stage, and watering at the balling stage.

1. Watering at the seedling stage

The cabbage seedling stage is small, the leaf area is not large, the transpiration effect is not strong, and the water requirement is also less, but the root system is not developed, and the deep soil water can not be used, and the temperature is still relatively high at this time, so it is necessary to water a little water frequently in the drought to make the soil moist, so that the seedlings can not only meet the need for water, but also reduce the ground temperature locally.

Generally, the watering of seedlings at the seedling stage is an effective measure to avoid the occurrence of viral diseases and cultivate strong seedlings. i.e. the first watering 24 hours after sowing; The seedlings are watered a second time when they have just been unearthed in small amounts.

Water the seedlings for the third time after they are fully established; The seedlings grow to the pull cross stage, and the seedlings are watered for the fourth time after interspersing; The true leaves appear to about 10 pieces, and then water the seedlings again. At the same time, attention should be paid to the drainage at the seedling stage to reduce the occurrence of black rot and soft rot in the later stage.

2. Watering during the rosette period

The rosette stage cabbage plants gradually grow, the growth rate is accelerated, the root system is also deepened, and the need for water is much greater than that at the seedling stage, and the water must be sufficient. However, at the same time, the water should not be too much, so as not to delay the bulbosetting period due to the growth of rosette leaves. Generally, the soil is watered thoroughly immediately after the application of fertiliser, and the soil is kept dry and wet during the rosette period.

If the plant grows in the late stage of rosette, it is necessary to take squatting measures. This is done by watering once 7 to 10 days before the balls are set, and then stopping the watering until the leaf color becomes dark green, thick and wrinkled, slightly wilted at noon, and the edge of the center of the plant is green. Watering should not be too much after squatting to prevent the petiole from cracking.

3. Watering during the ball-setting period

The balling stage is the fastest growing period of cabbage, which requires a lot of water, and often uses furrow irrigation or watering to increase soil moisture, and the frequency of watering can be determined according to the climate and soil moisture status.

If there is no rain for a long time or the soil is dry, it should be watered to keep the soil moist as the standard. It rains a lot or the soil has a "night tide" characteristic, so there is no need to water the soil if it is wet.

Generally, after the first watering at the end of squatting, it is necessary to wait before the soil is yellow and moist, and then watered for the second time. After the second watering, water every 7 8 days until 7 8 days before harvest, watering evenly and consistently, keeping the soil moist.