Field Water and Fertilizer Management of Chinese Cabbage in Autumn and Winter

Water and fertilizer management is an important key to high yield of Chinese cabbage. When planting Chinese cabbage in autumn and winter, correct management should be carried out according to climate conditions and water and fertilizer requirements of Chinese cabbage in each production period.

1. Seedling stage: the root system is underdeveloped, the absorption capacity is weak, and the autumn is often high temperature and drought, so it is necessary to supply enough water in time, adhere to small water irrigation, and promote root growth. When breaking the heart, topdressing is carried out once, thinning seedlings each time, combining with intertillage, thin topdressing and seedling raising.

2. Rosette stage: it is the period of rapid growth of Chinese cabbage. During this period, water and fertilizer management must be strengthened to promote vigorous plants. After seedling determination or plant growth, holes or small furrows should be opened between rows or plants to fertilize, compound fertilizer 20kg or ammonium sulfate 20kg per mu should be applied, water should be poured once after top dressing, and watering should be carried out according to the dry and wet conditions of the soil.

3, heading period: is the Chinese cabbage product formation period, need a lot of fertilizer and water, heading period water and fertilizer management, focus on the initial and middle stage of the heading, namely "barrel fertilizer" and "irrigation fertilizer", these two times to use rapid fertilizer, and must be applied in advance, immediately topdressing at the beginning of the core, ammonium sulfate 15-20 kg per mu, in the plant after the barrel and then topdressing once, topdressing combined with irrigation, irrigation method to slow irrigation method is good. Stop irrigation 10 days before harvest to avoid excessive water content in the bulbs and make them resistant to storage. Zhao Yun