1, temperature management
Use Vance, sheds or Xiaopeng to cultivate and keep it at least 13 degrees in the night. In the early stage, the windproof and dehumidification was performed daily on the basis of heat preservation, and the occurrence of downy mildew was reduced. In the middle and late period, the heat was preserved during the night and the temperature was mainly reduced during the day, until the shed film was completely removed, and the maximum temperature was maintained at about 25 degrees. After the planting, the use of a cover film to protect against the cold, with the temperature rising, gradually breaking the film, about half a month later, when the minimum temperature rises above 15 degrees, it will change to the film or all the film. After the film was removed, weeding and weeding were performed in time to raise the temperature and promote the development of the root system.
2, fertilizer and water management
As the temperature of early spring cabbage cultivation is low and the temperature is raised sharply in the later period of cultivation, it is unfavorable for the growth of the cabbage. Therefore, the suitable season for the growth of spring cabbage is shorter. In the management of spring cabbage, we must grasp the word “promote†and promote it in the end. In order to raise the temperature, Rosettes do not water or water. To promote root development. Later, according to weather and soil conditions, water once every 7 days. It is best to irrigate in the morning and evening to create a cool environment for the bulbous period. In order to prevent the occurrence of soft rot, should not be hit by flood irrigation, irrigation should be rapid withdrawal speed irrigation, no residual water in the ditch. Top dressing is carried out in two batches. After easing seedlings, 15-20 kg of urea can be topdressed.
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