Management methods and technical points for the rosette stage of Chinese cabbage
The rosette stage of Chinese cabbage mainly refers to the stage from the growth of its true leaves to head formation. The rosette stage is the most important stage among all the growth stages of Chinese cabbage, and the growth during this stage has a great relationship with its yield, generally lasting about 3-4 weeks. Therefore, the management work during this period is also very important, so today the editor brings you the management methods for the rosette stage of Chinese cabbage. Let's take a look below!
1. Intertillage and weeding
Chinese cabbage needs weeding about 3 times throughout its entire growth period, and one of these times is during the rosette stage. After Chinese cabbage enters the rosette stage, it should be weeded once in time before the rows close. The weeding time should be chosen on a sunny day when the leaves are soft. This prevents the Chinese cabbage leaves from being too firm and being damaged during weeding. When intertilling, the principle of deep furrows and shallow ridges should be followed, and the intertillage depth on the ridge backs should not exceed 5 cm. The depth of the furrows should be kept at about 10 cm, creating a good environment for the growth of Chinese cabbage during the rosette stage. After the rows close, intertillage should be stopped.
2. Fertilizer and water management
After Chinese cabbage enters the rosette stage, its growth speed accelerates, and its demand for nutrients and water also rises sharply. Therefore, at the early rosette stage, a plant-development fertilizer should be applied in time, mainly urea, generally by opening furrows beside the field furrows and applying the fertilizer. When opening the furrows, care must be taken not to damage the roots of the Chinese cabbage, so as to avoid reducing its nutrient absorption capacity. The rosette stage of Chinese cabbage is generally in summer, and the temperature at noon is relatively high, so we should appropriately use small drip irrigation to lower the surface temperature and promote the growth of Chinese cabbage. This prevents a high-temperature and high-humidity environment from causing diseases and pests. Then, after seedling restraint, water once about every week. Flood irrigation should not be used, to prevent excessive water from instead affecting the growth of Chinese cabbage.
3. Seedling restraint to promote rooting
During the period from the middle rosette stage to the heading stage of Chinese cabbage, the amount of watering should be controlled well to promote seedling restraint and prevent excessive vigorous growth. This increases leaf thickness, promotes root growth and development, increases nutrient accumulation in Chinese cabbage, avoids excessively high humidity, and reduces the incidence of diseases and pests in Chinese cabbage. The seedling restraint period for Chinese cabbage is generally about half a month. However, note that if the planted variety has a short growth cycle, fast growth, poor growth vigor, and a late sowing time, and there is drought and lack of water, high temperature and little fertilizer, then seedling restraint should be minimized or not carried out.
4. Disease and pest control
The threat of diseases and pests during the rosette stage is relatively great. Common diseases during this period include viral disease, soft rot, and others. The main conditions for the onset of these diseases are high temperature and high humidity, so we must pay attention to controlling the temperature and humidity in the field to avoid creating conditions for the onset of diseases and pests. Then we should often observe the growth of Chinese cabbage. After discovering the onset of disease, in addition to promptly checking the specific disease and applying the right remedy, we should also promptly remove weeds in the field and pull out diseased plants with no treatment value. This reduces sources of disease in the field, prevents the spread of the disease, and stops losses in time.
Then special attention should be paid to controlling aphids, because aphids not only feed on the stems and leaves of Chinese cabbage, but also carry pathogens of diseases such as viral disease and spread them. So when doing a good job of disease control, everyone should not neglect pest control work either. That is all for today's introduction. This article is for reference only, and I hope it can help everyone!