When is the rosette stage of Chinese cabbage? Appearance and management methods
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 is closely related to its yield; it generally lasts about 3-4 weeks. Therefore, 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 to be weeded about 3 times during its entire growth period, and one of those times is during the rosette stage. After Chinese cabbage enters the rosette stage, it should be weeded promptly once 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 hard and being damaged during weeding. During intertillage, 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 rate speeds up, and its demand for nutrients and water also rises sharply. Therefore, at the early stage of the rosette stage, a plant-development fertilizer should be applied promptly, mainly urea, generally by opening furrows beside the field furrows and applying the fertilizer there. When opening the furrows, be careful 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 pests and diseases. Then, after seedling hardening, water about once a week. Do not use large-volume irrigation, to prevent excessive water from instead affecting the growth of Chinese cabbage.
3. Seedling hardening to promote rooting
During the period from the middle of the rosette stage to the heading of Chinese cabbage, the amount of watering should be controlled well to promote seedling hardening of Chinese cabbage and prevent excessive vegetative 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 pests and diseases in Chinese cabbage. The seedling hardening period for Chinese cabbage is generally about half a month. However, note that if the planted variety has a short growth cycle, grows quickly, has poor growth, or is sown late, and if there is drought and lack of water, high temperature and little fertilizer, then seedling hardening should be minimized or not carried out at all.
4. Pest and disease control
The threat of pests and diseases during the rosette stage is relatively great. Common diseases during this period include viral disease and soft rot. 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 pests and diseases to develop. Then we should frequently observe the growth of Chinese cabbage. After discovering disease occurrence, in addition to promptly checking the specific disease and applying the right treatment, we should also promptly remove weeds from the field and pull out diseased plants that have 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 gnaw 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 must 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!